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      <div class="ays_cb_and_a"><span>Created on </span><strong><time>October 30, 2022</time></strong><span> By </span><img alt="" src="//cfdflowengineering.com/wp-content/plugins/a3-lazy-load/assets/images/lazy_placeholder.gif"
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                  srcset="https://secure.gravatar.com/avatar/?s=64&amp;d=mm&amp;r=g 2x" class="avatar avatar-32 photo avatar-default" height="32" width="32" decoding="async"></noscript><strong>Dr. Sharad
                Pachpute</strong></noscript></noscript></noscript></div> <img src="//cfdflowengineering.com/wp-content/plugins/a3-lazy-load/assets/images/lazy_placeholder.gif" data-lazy-type="image"
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        <p class="ays-fs-title">Basic of CFD and Fluid Mechanics -QUIZ</p>
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          <p>Basic of CFD and Fluid Mechanics will be examined</p>
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        <p>Which of these terms represents the inertia term in the momentum equation</p>
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        <p>Which of the following is the source term in the momentum equation for natural convection</p>
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        <div class="ays-field ays_list_view_item"> <input type="hidden" name="ays_answer_correct[]" value="0"> <input type="radio" name="ays_questions[ays-question-19]" id="ays-answer-72-3" value="72"> <label for="ays-answer-72-3">Pressure
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        <p><strong>The staggered grid is useful to overcome&nbsp;</strong></p>
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            Pressure (scalar) and Velocities (vector)</label> </div>
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            Pressure (scalar) and Velocities (vector)</label> </div>
        <div class="ays-field ays_list_view_item"> <input type="hidden" name="ays_answer_correct[]" value="1"> <input type="radio" name="ays_questions[ays-question-18]" id="ays-answer-70-3" value="70"> <label for="ays-answer-70-3">Interpolation
            between cells</label> </div>
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        <p>The outflow boundary condition is used in the CFD domain for the boundary</p>
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        <div class="ays-field ays_list_view_item"> <input type="hidden" name="ays_answer_correct[]" value="0"> <input type="radio" name="ays_questions[ays-question-17]" id="ays-answer-64-3" value="64"> <label for="ays-answer-64-3">Near the
            Inlet</label> </div>
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        <p><strong>The continuity equations for incompressible flow (divergence of velocity vector,V)</strong></p>
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        <p><strong>Which&nbsp; is essential CFD input to carry out simulation</strong></p>
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        <div class="ays-field ays_list_view_item"> <input type="hidden" name="ays_answer_correct[]" value="0"> <input type="radio" name="ays_questions[ays-question-15]" id="ays-answer-56-3" value="56"> <label for="ays-answer-56-3">Governing
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        <p><strong>In CFD modeling, what are the two major types of numerical boundary conditions?</strong></p>
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        <p><strong>In the first order Updwind scheme, which variation is considered?</strong></p>
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        <div class="ays-field ays_list_view_item"> <input type="hidden" name="ays_answer_correct[]" value="1"> <input type="radio" name="ays_questions[ays-question-13]" id="ays-answer-48-3" value="48"> <label for="ays-answer-48-3">Linear</label>
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        <div class="ays-field ays_list_view_item"> <input type="hidden" name="ays_answer_correct[]" value="0"> <input type="radio" name="ays_questions[ays-question-13]" id="ays-answer-49-3" value="49"> <label for="ays-answer-49-3">Quadratic</label>
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        <p><strong>How many variables of Boundary conditions are to be specified for 2D flow?</strong></p>
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        <p><strong>To simulate any laminar flow with any geometry, which of the following equations are solved</strong></p>
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        <p>For incompressible flow, &nbsp;dependent variables in the Navier-Stokes equations are</p>
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  <div class="step " data-question-id="9" data-type="radio" il_cc1="2">
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        <p>For numerical simulations, &nbsp;what are the independent variables in the Navier-Stokes equations after discretization?</p>
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        <p>The momentum equation is based on</p>
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        <p>A control volume-based model results in which equation?</p>
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        <p>The continuity equation is derived based on</p>
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                  srcset="https://secure.gravatar.com/avatar/?s=64&amp;d=mm&amp;r=g 2x" class="avatar avatar-32 photo avatar-default" height="32" width="32" decoding="async"></noscript><strong>Dr. Sharad
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        <p>For constant air properties, the forced convective heat transfer rate depends on</p>
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        <p>Convective heat transfer is calculated by which of the reference temperature</p>
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        <p>Thermal conductivity for anisotropic is defined as</p>
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        <p>Which of the following Laws is based on convective heat transfer between a surface and adjacent fluid</p>
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        <p>For the homogenous material, the rate of heat transfer normal to the plane wall is given by which of the following equation?</p>
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        <p>The unit heat transfer is given as</p>
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        <p>which of the following law the heat transfer takes place?</p>
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        <p><strong>In natural convection, the source term due to buoyancy&nbsp; in the energy equation is calculated by</strong></p>
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        <p><strong>In natural convection, the coefficient of expansion of fluid (<em>β</em>) for an ideal gas is calculated as</strong></p>
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    #ays-quiz-container-5 .ays-quiz-question-note-message-box,
    #ays-quiz-container-5 .ays_quiz_question,
    #ays-quiz-container-5 .ays_quiz_question *:not([class^='enlighter']) {
      color: #000;
    }

    #ays-quiz-container-5 textarea,
    #ays-quiz-container-5 input::first-letter,
    #ays-quiz-container-5 select::first-letter,
    #ays-quiz-container-5 option::first-letter {
      color: initial !important;
    }

    #ays-quiz-container-5 p::first-letter:not(.ays_no_questions_message) {
      color: #000 !important;
      background-color: transparent !important;
      font-size: inherit !important;
      font-weight: inherit !important;
      float: none !important;
      line-height: inherit !important;
      margin: 0 !important;
      padding: 0 !important;
    }

    #ays-quiz-container-5 .select2-container,
    #ays-quiz-container-5 .ays-field * {
      font-size: 15px !important;
    }

    #ays-quiz-container-5 .ays_quiz_question p {
      font-size: 16px;
    }

    #ays-quiz-container-5 .ays-fs-subtitle p {
      text-align: center;
    }

    #ays-quiz-container-5 .ays_quiz_question {
      text-align: center;
      margin-bottom: 10px;
    }

    #ays-quiz-container-5 .ays_quiz_question pre {
      max-width: 100%;
      white-space: break-spaces;
    }

    #ays-quiz-container-5 .ays-quiz-timer p {
      font-size: 16px;
    }

    #ays-quiz-container-5 section.ays_quiz_redirection_timer_container hr,
    #ays-quiz-container-5 section.ays_quiz_timer_container hr {
      margin: 0;
    }

    #ays-quiz-container-5 section.ays_quiz_timer_container.ays_quiz_timer_red_warning .ays-quiz-timer {
      color: red;
    }

    #ays-quiz-container-5 .ays_thank_you_fs p {
      text-align: center;
    }

    #ays-quiz-container-5 input[type='button'],
    #ays-quiz-container-5 input[type='submit'] {
      color: #000000 !important;
      outline: none;
    }

    #ays-quiz-container-5 .information_form input[type='text'],
    #ays-quiz-container-5 .information_form input[type='url'],
    #ays-quiz-container-5 .information_form input[type='number'],
    #ays-quiz-container-5 .information_form input[type='email'],
    #ays-quiz-container-5 .information_form input[type='checkbox'],
    #ays-quiz-container-5 .information_form input[type='tel'],
    #ays-quiz-container-5 .information_form textarea,
    #ays-quiz-container-5 .information_form select,
    #ays-quiz-container-5 .information_form option {
      color: initial !important;
      outline: none;
      background-image: unset;
    }

    #ays-quiz-container-5 .wrong_answer_text {
      color: #ff4d4d;
    }

    #ays-quiz-container-5 .right_answer_text {
      color: #33cc33;
    }

    #ays-quiz-container-5 .wrong_answer_text p {
      font-size: 16px;
    }

    #ays-quiz-container-5 .ays_questtion_explanation p {
      font-size: 16px;
    }

    #ays-quiz-container-5 .right_answer_text p {
      font-size: 16px;
    }

    #ays-quiz-container-5 .ays-quiz-question-note-message-box p {
      font-size: 14px;
    }

    #ays-quiz-container-5 .ays_cb_and_a,
    #ays-quiz-container-5 .ays_cb_and_a * {
      color: rgb(0, 0, 0);
      text-align: center;
    }

    /* Quiz textarea height */
    #ays-quiz-container-5 textarea {
      height: 150px;
      min-height: 150px;
    }

    /* Quiz rate and passed users count */
    #ays-quiz-container-5 .ays_quizn_ancnoxneri_qanak,
    #ays-quiz-container-5 .ays_quiz_rete_avg {
      color: #fff !important;
      background-color: #000;
    }

    #ays-quiz-container-5 .ays-questions-container>.ays_quizn_ancnoxneri_qanak {
      padding: 5px 20px;
    }

    #ays-quiz-container-5 div.for_quiz_rate.ui.star.rating .icon {
      color: rgba(0, 0, 0, 0.35);
    }

    #ays-quiz-container-5 .ays_quiz_rete_avg div.for_quiz_rate_avg.ui.star.rating .icon {
      color: rgba(255, 255, 255, 0.5);
    }

    #ays-quiz-container-5 .ays_quiz_rete .ays-quiz-rate-link-box .ays-quiz-rate-link {
      color: #000;
    }

    /* Loaders */
    #ays-quiz-container-5 div.lds-spinner,
    #ays-quiz-container-5 div.lds-spinner2 {
      color: #000;
    }

    #ays-quiz-container-5 div.lds-spinner div:after,
    #ays-quiz-container-5 div.lds-spinner2 div:after {
      background-color: #000;
    }

    #ays-quiz-container-5 .lds-circle,
    #ays-quiz-container-5 .lds-facebook div,
    #ays-quiz-container-5 .lds-ellipsis div {
      background: #000;
    }

    #ays-quiz-container-5 .lds-ripple div {
      border-color: #000;
    }

    #ays-quiz-container-5 .lds-dual-ring::after,
    #ays-quiz-container-5 .lds-hourglass::after {
      border-color: #000 transparent #000 transparent;
    }

    /* Stars */
    #ays-quiz-container-5 .ui.rating .icon,
    #ays-quiz-container-5 .ui.rating .icon:before {
      font-family: Rating !important;
    }

    /* Progress bars */
    #ays-quiz-container-5 #ays_finish_quiz_5 .ays-progress {
      border-color: rgba(0, 0, 0, 0.8);
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .ays-progress-bg {
      background-color: rgba(0, 0, 0, 0.3);
    }

    #ays-quiz-container-5 .ays-progress-value {
      color: #000;
      text-align: center;
    }

    #ays-quiz-container-5 .ays-progress-bar {
      background-color: #27AE60;
    }

    #ays-quiz-container-5 .ays-question-counter .ays-live-bar-wrap {
      direction: ltr !important;
    }

    #ays-quiz-container-5 .ays-live-bar-fill {
      color: #000;
      border-bottom: 2px solid rgba(0, 0, 0, 0.8);
      text-shadow: 0px 0px 5px #fff;
    }

    #ays-quiz-container-5 .ays-live-bar-fill.ays-live-fourth,
    #ays-quiz-container-5 .ays-live-bar-fill.ays-live-third,
    #ays-quiz-container-5 .ays-live-bar-fill.ays-live-second {
      text-shadow: unset;
    }

    #ays-quiz-container-5 .ays-live-bar-percent {
      display: none;
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .ays_average {
      text-align: center;
    }

    /* Music, Sound */
    #ays-quiz-container-5 .ays_music_sound {
      color: rgb(0, 0, 0);
    }

    /* Dropdown questions scroll bar */
    #ays-quiz-container-5 blockquote {
      border-left-color: #000 !important;
    }

    /* Quiz Password */
    #ays-quiz-container-5 .ays-start-page>input[id^='ays_quiz_password_val_'],
    #ays-quiz-container-5 .ays-quiz-password-toggle-visibility-box {
      width: 100%;
    }

    /* Question hint */
    #ays-quiz-container-5 .ays_question_hint_container .ays_question_hint_text {
      background-color: #fff;
      box-shadow: 0 0 15px 3px rgba(0, 0, 0, 0.6);
      max-width: 270px;
    }

    #ays-quiz-container-5 .ays_question_hint_container .ays_question_hint_text p {
      max-width: unset;
    }

    #ays-quiz-container-5 .ays_questions_hint_max_width_class {
      max-width: 80%;
    }

    /* Information form */
    #ays-quiz-container-5 .ays-form-title {
      color: rgb(0, 0, 0);
    }

    /* Quiz timer */
    #ays-quiz-container-5 div.ays-quiz-redirection-timer,
    #ays-quiz-container-5 div.ays-quiz-timer {
      color: #000;
      text-align: center;
    }

    #ays-quiz-container-5 div.ays-quiz-timer.ays-quiz-message-before-timer:before {
      font-weight: 500;
    }

    /* Quiz title / transformation */
    #ays-quiz-container-5 .ays-fs-title {
      text-transform: uppercase;
      font-size: 21px;
      text-align: center;
      text-shadow: none;
    }

    /* Quiz buttons */
    #ays-quiz-container-5 .ays_arrow {
      color: #000000 !important;
    }

    #ays-quiz-container-5 input#ays-submit,
    #ays-quiz-container-5 #ays_finish_quiz_5 .action-button,
    div#ays-quiz-container-5 #ays_finish_quiz_5 .action-button.ays_restart_button {
      background: none;
      background-color: #27AE60;
      color: #000000;
      font-size: 17px;
      padding: 10px 20px;
      border-radius: 3px;
      height: auto;
      letter-spacing: 0;
      box-shadow: unset;
    }

    #ays-quiz-container-5 input#ays-submit,
    #ays-quiz-container-5 #ays_finish_quiz_5 input.action-button {}

    #ays-quiz-container-5 #ays_finish_quiz_5 .action-button.ays_check_answer {
      padding: 5px 10px;
      font-size: 17px !important;
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .action-button.ays_restart_button {
      white-space: nowrap;
      padding: 5px 10px;
      white-space: normal;
    }

    #ays-quiz-container-5 input#ays-submit:hover,
    #ays-quiz-container-5 input#ays-submit:focus,
    #ays-quiz-container-5 #ays_finish_quiz_5 .action-button:hover,
    #ays-quiz-container-5 #ays_finish_quiz_5 .action-button:focus {
      background: none;
      box-shadow: 0 0 0 2px #000000;
      background-color: #27AE60;
    }

    #ays-quiz-container-5 .ays_restart_button {
      color: #000000;
    }

    #ays-quiz-container-5 .ays_restart_button_p,
    #ays-quiz-container-5 .ays_buttons_div {
      justify-content: center;
    }

    #ays-quiz-container-5 .ays_finish.action-button {
      margin: 10px 5px;
    }

    #ays-quiz-container-5 .ays-share-btn.ays-share-btn-branded {
      color: #fff;
    }

    /* Question answers */
    #ays-quiz-container-5 .ays-field {
      border-color: #444;
      border-style: solid;
      border-width: 1px;
      box-shadow: none;
    }

    /* Answer maximum length of a text field */
    #ays-quiz-container-5 .ays_quiz_question_text_message {
      color: #000;
      text-align: left;
      font-size: 12px;
    }

    div#ays-quiz-container-5 div.ays_quiz_question_text_error_message {
      color: #ff0000;
    }

    #ays-quiz-container-5 .ays-quiz-answers .ays-field:hover {
      opacity: 1;
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .ays-field {
      margin-bottom: 10px;
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .ays-field.ays_grid_view_item {
      width: calc(50% - 5px);
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .ays-field.ays_grid_view_item:nth-child(odd) {
      margin-right: 5px;
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .ays-field input:checked+label:before {
      border-color: #27AE60;
      background: #27AE60;
      background-clip: content-box;
    }

    #ays-quiz-container-5 .ays-quiz-answers div.ays-text-right-answer {
      color: #000;
    }

    /* Questions answer image */
    #ays-quiz-container-5 .ays-answer-image {
      width: 50%;
    }

    /* Questions answer right/wrong icons */
    #ays-quiz-container-5 .ays-field input~label.answered.correct:after {
      content: url('https://cfdflowengineering.com/wp-content/plugins/quiz-maker/public/images/correct.png');
    }

    #ays-quiz-container-5 .ays-field input~label.answered.wrong:after {
      content: url('https://cfdflowengineering.com/wp-content/plugins/quiz-maker/public/images/wrong.png');
    }

    /* Dropdown questions */
    #ays-quiz-container-5 #ays_finish_quiz_5 .ays-field .select2-container--default .select2-selection--single {
      border-bottom: 2px solid #27AE60;
      background-color: #27AE60;
    }

    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__placeholder,
    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered,
    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow {
      color: #ffffff;
    }

    #ays-quiz-container-5 .select2-container--default .select2-search--dropdown .select2-search__field:focus,
    #ays-quiz-container-5 .select2-container--default .select2-search--dropdown .select2-search__field {
      outline: unset;
      padding: 0.75rem;
    }

    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered,
    #ays-quiz-container-5 .select2-container--default .select2-results__option--highlighted[aria-selected] {
      background-color: #27AE60;
    }

    #ays-quiz-container-5 .ays-field .select2-container--default,
    #ays-quiz-container-5 .ays-field .select2-container--default .selection,
    #ays-quiz-container-5 .ays-field .select2-container--default .dropdown-wrapper,
    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered,
    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered .select2-selection__placeholder,
    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow,
    #ays-quiz-container-5 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow b[role='presentation'] {
      font-size: 16px !important;
    }

    #ays-quiz-container-5 .select2-container--default .select2-results__option {
      padding: 6px;
    }

    /* Dropdown questions scroll bar */
    #ays-quiz-container-5 .select2-results__options::-webkit-scrollbar {
      width: 7px;
    }

    #ays-quiz-container-5 .select2-results__options::-webkit-scrollbar-track {
      background-color: rgba(255, 255, 255, 0.35);
    }

    #ays-quiz-container-5 .select2-results__options::-webkit-scrollbar-thumb {
      transition: .3s ease-in-out;
      background-color: rgba(0, 0, 0, 0.55);
    }

    #ays-quiz-container-5 .select2-results__options::-webkit-scrollbar-thumb:hover {
      transition: .3s ease-in-out;
      background-color: rgba(0, 0, 0, 0.85);
    }

    /* Audio / Video */
    #ays-quiz-container-5 .mejs-container .mejs-time {
      box-sizing: unset;
    }

    #ays-quiz-container-5 .mejs-container .mejs-time-rail {
      padding-top: 15px;
    }

    #ays-quiz-container-5 .mejs-container .mejs-mediaelement video {
      margin: 0;
    }

    /* Limitation */
    #ays-quiz-container-5 .ays-quiz-limitation-count-of-takers {
      padding: 50px;
    }

    #ays-quiz-container-5 div.ays-quiz-results-toggle-block span.ays-show-res-toggle.ays-res-toggle-show,
    #ays-quiz-container-5 div.ays-quiz-results-toggle-block span.ays-show-res-toggle.ays-res-toggle-hide {
      color: #000;
    }

    #ays-quiz-container-5 div.ays-quiz-results-toggle-block input:checked+label.ays_switch_toggle {
      border: 1px solid #000;
    }

    #ays-quiz-container-5 div.ays-quiz-results-toggle-block input:checked+label.ays_switch_toggle {
      border: 1px solid #000;
    }

    #ays-quiz-container-5 div.ays-quiz-results-toggle-block input:checked+label.ays_switch_toggle:after {
      background: #000;
    }

    #ays-quiz-container-5.ays_quiz_elegant_dark div.ays-quiz-results-toggle-block input:checked+label.ays_switch_toggle:after,
    #ays-quiz-container-5.ays_quiz_rect_dark div.ays-quiz-results-toggle-block input:checked+label.ays_switch_toggle:after {
      background: #000;
    }

    /* Hestia theme (Version: 3.0.16) | Start */
    #ays-quiz-container-5 .mejs-container .mejs-inner .mejs-controls .mejs-button>button:hover,
    #ays-quiz-container-5 .mejs-container .mejs-inner .mejs-controls .mejs-button>button {
      box-shadow: unset;
      background-color: transparent;
    }

    #ays-quiz-container-5 .mejs-container .mejs-inner .mejs-controls .mejs-button>button {
      margin: 10px 6px;
    }

    /* Hestia theme (Version: 3.0.16) | End */
    /* Go theme (Version: 1.4.3) | Start */
    #ays-quiz-container-5 label[for^='ays-answer']:before,
    #ays-quiz-container-5 label[for^='ays-answer']:before {
      -webkit-mask-image: unset;
      mask-image: unset;
    }

    #ays-quiz-container-5.ays_quiz_classic_light .ays-field input:checked+label.answered.correct:before,
    #ays-quiz-container-5.ays_quiz_classic_dark .ays-field input:checked+label.answered.correct:before {
      background-color: #27AE60 !important;
    }

    /* Go theme (Version: 1.4.3) | End */
    #ays-quiz-container-5 .ays_quiz_results fieldset.ays_fieldset .ays_quiz_question .wp-video {
      width: 100% !important;
      max-width: 100%;
    }

    /* Classic Dark / Classic Light */
    /* Dropdown questions right/wrong styles */
    #ays-quiz-container-5.ays_quiz_classic_dark .correct_div,
    #ays-quiz-container-5.ays_quiz_classic_light .correct_div {
      border-color: green !important;
      opacity: 1 !important;
      background-color: rgba(39, 174, 96, 0.4) !important;
    }

    #ays-quiz-container-5.ays_quiz_classic_dark .correct_div .selected-field,
    #ays-quiz-container-5.ays_quiz_classic_light .correct_div .selected-field {
      padding: 0px 10px 0px 10px;
      color: green !important;
    }

    #ays-quiz-container-5.ays_quiz_classic_dark .wrong_div,
    #ays-quiz-container-5.ays_quiz_classic_light .wrong_div {
      border-color: red !important;
      opacity: 1 !important;
      background-color: rgba(243, 134, 129, 0.4) !important;
    }

    #ays-quiz-container-5.ays_quiz_classic_dark .ays-field,
    #ays-quiz-container-5.ays_quiz_classic_light .ays-field {
      text-align: left;
      /*margin-bottom: 10px;*/
      padding: 0;
      transition: .3s ease-in-out;
    }

    #ays-quiz-container-5 .ays-quiz-close-full-screen {
      fill: #000;
    }

    #ays-quiz-container-5 .ays-quiz-open-full-screen {
      fill: #000;
    }

    #ays-quiz-container-5 .ays_quiz_login_form p {
      color: #000;
    }

    @media screen and (max-width: 768px) {
      #ays-quiz-container-5 {
        max-width: 100%;
      }

      #ays-quiz-container-5 .ays_quiz_question p {
        font-size: 16px;
      }

      #ays-quiz-container-5 .select2-container,
      #ays-quiz-container-5 .ays-field * {
        font-size: 15px !important;
      }

      div#ays-quiz-container-5 input#ays-submit,
      div#ays-quiz-container-5 #ays_finish_quiz_5 .action-button,
      div#ays-quiz-container-5 #ays_finish_quiz_5 .action-button.ays_restart_button {
        font-size: 17px;
      }

      /* Quiz title / mobile font size */
      div#ays-quiz-container-5 .ays-fs-title {
        font-size: 21px;
      }

      /* Question explanation / mobile font size */
      #ays-quiz-container-5 .ays_questtion_explanation p {
        font-size: 16px;
      }

      /* Wrong answers / mobile font size */
      #ays-quiz-container-5 .wrong_answer_text p {
        font-size: 16px;
      }

      /* Right answers / mobile font size */
      #ays-quiz-container-5 .right_answer_text p {
        font-size: 16px;
      }

      /* Note text / mobile font size */
      #ays-quiz-container-5 .ays-quiz-question-note-message-box p {
        font-size: 14px;
      }
    }

    /* Custom css styles */
    /* RTL direction styles */
  </style>
  <style>
    #ays-quiz-container-5 p {
      margin: 0.625em;
    }

    #ays-quiz-container-5 .ays-field.checked_answer_div input:checked+label {
      background-color: rgba(39, 174, 96, 0.6);
    }

    #ays-quiz-container-5.ays_quiz_classic_light .enable_correction .ays-field.checked_answer_div input:checked+label,
    #ays-quiz-container-5.ays_quiz_classic_dark .enable_correction .ays-field.checked_answer_div input:checked+label {
      background-color: transparent;
    }

    #ays-quiz-container-5 .ays-field.checked_answer_div input:checked+label:hover {
      background-color: rgba(39, 174, 96, 0.8);
    }

    #ays-quiz-container-5 .ays-field:hover label {
      background: rgba(39, 174, 96, 0.8);
      /* border-radius: 4px; */
      color: #fff;
      transition: all .3s;
    }

    #ays-quiz-container-5 #ays_finish_quiz_5 .action-button:hover,
    #ays-quiz-container-5 #ays_finish_quiz_5 .action-button:focus {
      box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;
      background: #27AE60;
    }
  </style>
  <script>
    if (typeof aysQuizOptions === 'undefined') {
      var aysQuizOptions = [];
    }
    aysQuizOptions['5'] =
      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WORKING PRINCIPLE OF BIOMASS COMBUSTION AND ITS CFD MODELLING

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Introduction to Biomass Combustion in Stove The working of biomass combustion
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Industrial Burners: Types, Parts, Design, and Combustion Technology for Low
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TURBULENCE MODELING IN CFD SIMULATIONS

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Scope of Turbulence Modeling In fluid mechanics, flow flow are classified as
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CFD MODELLING OF HVAC FOR ENHANCING PERFORMANCE

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Heating Ventilation and Air Conditioning  HVAC (Heating, Ventilation, and Air
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CFD MODELING OF HEAT EXCHANGERS

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Heat Exchangers Heat exchangers are devices used to transfer heat between two
fluids, typically a hot and a cold fluid. …

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UNDERSTANDING OF FIRE DYNAMICS AND ITS CFD MODELING

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Understanding of Fire Dynamics  Fire dynamics is the study of how fires start,
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ONLINE QUIZ ON HEAT TRANSFER MODELLING

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TURBULENT FLOW MODELING QUIZ

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mathematical model to predict the effects …

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FUNDAMENTALS OF TURBOMACHINERY AND GOVERNING LAWS

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What are the fundamentals of Fluid Machinery? Introduction What is fluid
machinery? A fluid machinery (turbo-machinery) is a mechanical device …

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DATA CENTRE COOLING AND ITS CFD MODELING

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Why Data Centre Cooling is Important?   Introduction to Data Centre Data Centre
is similar CPU of our PC or …

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WORKING PRINCIPLE OF THERMAL OXIDIZERS AND ITS APPLICATIONS

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What is a thermal Oxidizer? A thermal Oxidizer is an essential part of chemical
or thermal power plants to control …

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COMBUSTION TECHNOLOGY IN AUTOMOBILE

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 Modern Combustion Technology in Automobile by Dr. Sharad Pachpute Introduction
to Combustion in Automobile  Basic of combustion would help to …

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CFD MODELING OF BATTERY WITH TRANSPORT EQUATIONS

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How to simulate a CFD model of Battery using ANSYS FLUENT?   Introduction to
Scope of  Battery Modeling Energy storage …

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CFD MODELING OF FLOW OVER A CYLINDER

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 CFD Modeling of Laminar and Turbulent Flow  Over a Circular Cylinder  By Dr.
Sharad N. Pachpute Flow Over a Cylinder …

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CFD MODELLING OF LAMINAR FLOW THROUGH PIPE

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CFD Simulation of Laminar Flow through the Pipe Introduction to laminar flow
through Pipe Laminar flow is streamlined flow which …

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BASIC OF FLOW MEASUREMENT TECHNIQUE

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What are Flow Measurement Techniques used in Industries?     Introduction to
Flow Measurement Why Flow measurement is essential? Flow …

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BASICS OF OPENFOAM : OPEN SOURCE CFD SOLVER

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What is the basic structure of Open Source CFD Solver? By Dr. Sharad N. Pachpute
  Introduction to OpenFOAM Open …

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ESSENTIALS OF FLUID MECHANICS FOR CFD ENGINEERS

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What are Essentials Topics of Fluid Mechanics for CFD Modeling by Dr. Sharad N.
Pachpute   Introduction of Fluid Flows …

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ROLE OF VENTILATION TO SAVE COVID-19 PATIENTS

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How to Select a Medical Ventilator to Save Critical COVID-19 Patients by Dr.
Sharad N. Pachpute    Introduction to Ventilator …

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CFD ANALYSIS AND EFFECT OF COVID -19 TRANSMISSION ON HUMAN LUNGS

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What is the Effect of COVID -19 Transmission on Human Lungs By Dr. Sharad N.
Pachpute Flow Physics of Respiratory …

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CFD ANALYSIS OF COVID-19 TRANSMISSION BY PERSON-TO-PERSON SPREADING

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  How do you avoid COVID-19 Transmission by social distancing ? By Dr. Sharad N.
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EFFECT OF MASK ON FLOW PHYSICS OF COVID-19 TRANSMISSION

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Which face mask  is more effective against COVID-19  transmission? By Dr. Sharad
N. Pachpute   Flow Physics of Breathing The …

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BATTERY THERMAL MANAGEMENT SYSTEM FOR ELECTRIC VEHICLES

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What is Battery Thermal Management System (BTMS) A Battery Thermal Management
System (BTMS) is a critical component in modern battery-powered …

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97
Created on October 30, 2022 By Dr. Sharad Pachpute

Basic of CFD and Fluid Mechanics -QUIZ

Basic of CFD and Fluid Mechanics will be examined

1 / 20

Which of these terms represents the inertia term in the momentum equation

∇.(ρuV)
∇.(uV)
∇.(ρV )
∇.(uV)





2 / 20

Which of the following is the source term in the momentum equation for natural
convection

Pressure gradient
Buoyancy
Viscous Stress
Inertia





3 / 20

The staggered grid is useful to overcome 

Coupling of Pressure (scalar) and Velocities (vector)
Decoupling of Pressure (scalar) and Velocities (vector)
Interpolation between cells
Alternative coupling





4 / 20

The outflow boundary condition is used in the CFD domain for the boundary

Near the Inlet
Away from Outlet
Zero gradient for all variables
Zero gradient for all variables except pressure





5 / 20

The continuity equations for incompressible flow (divergence of velocity
vector,V)

∇.V
∇V
∇×V
∇.∇V





6 / 20

Which  is essential CFD input to carry out simulation

Governing Equations
Boundary Condition
Experimental Data
Numerical Scheme





7 / 20

In CFD modeling, what are the two major types of numerical boundary conditions?


Dirichlet and Neumann
Inlet and outlet
Fixed Wall
Symmetry





8 / 20

In the first order Updwind scheme, which variation is considered?

Linear
Quadratic
Parabolic
Hyperbolic





9 / 20

How many variables of Boundary conditions are to be specified for 2D flow?

One
Two
Three
Four





10 / 20

To simulate any laminar flow with any geometry, which of the following equations
are solved

Instantaneous Navier-Stokes equations
Equations for homogenous flow
Momentum Equation
Filtered Equations





11 / 20

For incompressible flow,  dependent variables in the Navier-Stokes equations are

u, v, w
u, v, w, P, ρ
x, y, z, t





12 / 20

For numerical simulations,  what are the independent variables in the
Navier-Stokes equations after discretization?


x, y, z, ρ
x, y, z, t, ρ
x, y, z, t
x, y, z





13 / 20

The momentum equation is based on


Mass conservation
First Law of Thermodynamics
Newtons Second Law of Motion
Kinetics





14 / 20

A control volume-based model results in which equation?


Differential
Integral
Linear
Conservative





15 / 20

In post-processing of CFD results, which plots are irrelevant?


Contour Plot
X-Y Plot
Vector Plot
Bar Plot





16 / 20

The continuity equation is derived based on


Energy conservation
Zeroth Law thermodynamics
First Law of Thermodynamics
Mass conservation





17 / 20

For the implicit method, which is the essential step?

Linearizing the Partial differential equation
Linearizing the difference equation
Normalizing the Partial differential equation
High order Differentiation





18 / 20

Which of the following does not come under the three main elements of CFD
modeling?

Process calculation
Pre-processing
Post-processing
Simulation





19 / 20

The region  of interest for CFD analysis is carried is called


Mesh Density
Grid Size
Computational Domain
Area





20 / 20

CFD is the third pillar for numerical fluid flow analysis. What are the other
two traditional approaches?


Analytical and Physical
Theoretical and experimental
Numerical and Pseudo method
Experimental and Statistics





Your score is

The average score is 59%


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https://www.youtube.com/@CFDFlowEngineering

67
Created on January 24, 2023 By Dr. Sharad Pachpute

Online Quiz on Heat Transfer

Fundamental questions on Heat Transfer and its numerical modeling are given in
this quiz

Email to get the Gift  of the PDF booklet: cfdflowengineering@gmail.com

if you score > 80%:

1 / 21

Which of the following methods is not used to discretize the Radiative Transport
Equation for combustion


Discrete Transfer Radiation Method
P1- Radiation Model
Discrete Radiation Model
Surface Radiation Model





2 / 21

The radiative Heat transport equation is numerically solved for


Surface Temperature
Absorbing and scattering Gas Medium
Absorbing and scattering Surfaces
Medium Thermal Properties





3 / 21

Radiation heat transfer is determined by which law


Kirchhoff's law
Newtons Law of Cooling
Thermodynamic laws
Mass Conservation





4 / 21

The relation between momentum and thermal boundary layer  is defined by which of
the following parameter


Velocity/Thermal diffusivity
Viscosity of fluid/ Eddy viscosity
Kinematic viscosity /Thermal diffusivity
Turbulent Models





5 / 21

For turbulent heat transfer over a heated plate, the turbulent diffusivity is
determined using


Turbulent viscosity / Prandtl's Number
Eddy viscosity/Laminar viscosity
Mean Velocity Gradient
Mean Temperature Gradient





6 / 21

Heat transfer coefficient in CFD simulation is calculated using


Nusselt Number Correlation
Reynolds and Prandtl's Number
Energy balance to First Stationary Fluid Layer adjacent to wall
Temperature gradient in thermal boundary layer





7 / 21

what is the unit of heat transfer coefficient?


W/m2-k
W/m-k
W/m2
W/k4





8 / 21

For constant air properties, the forced convective heat transfer rate depends on


Inlet Velocity
Reynolds and Prandtl Number
Temperature Gradients
Properties of sold and fluid





9 / 21

Convective heat transfer is calculated by which of the reference temperature


Surrounding Temperature (Ta)
Fluid Temperature (Tf)
Average of Inlet and surrounding
Standard Temperature (Tst)





10 / 21

Thermal conductivity for anisotropic is defined as


Scalar
Vector
Second Order Tensor
Heat Flux Vector





11 / 21

Which of the following Laws is based on convective heat transfer between a
surface and adjacent fluid


Newtons Law of Cooling
Fourier's Law
Kirchhoff’s law
First Law of Energy





12 / 21

For the homogenous material, the rate of heat transfer normal to the plane wall
is given by which of the following equation?


Q = 2kALx
Q = 2k/L x
Q = kA (T1-T2)/L
Q = 2kAx/ L





13 / 21

The unit heat transfer is given as

Joule
Watt
Pascal
Calorie





14 / 21

which of the following law the heat transfer takes place?

First Law of Thermodynamics
Second Law of Thermodynamics
Newtons Law of Cooling
Kirchhoff's law of Radiation





15 / 21

Which of the following is a method of heat transfer?

Conduction
Convection
Thermal Radiation
All above





16 / 21

In natural convection, the source term due to buoyancy  in the energy equation
is calculated by


Rayleigh number and Prandtl's Number
Bounssinq hypothesis
Reynolds number and Prandtl's Number
Grashof





17 / 21

which of the following terms is added to compute turbulent convective transfer
in RANS equations

Turbulent Heat Diffusion
Turbulent Advection
Unsteady Term
Mean Temperature Gradient





18 / 21

Which of the following radiation models accounts for the effect of flue gas
composition on heat transfer


weighted-sum-of-gray-gases (WSGG) model
Discrete Radiation Model
P1- Model
Surface Radiation Model





19 / 21

In natural convection, the coefficient of expansion of fluid (β) for an ideal
gas is calculated as

∆P/∆x
∆ρ/∆Tρ
∆P/∆Tρ
1/T





20 / 21

To compute the convective heat transfer from the heating surface which numerical
scheme is used

Central scheme
SIMPLE
Upwind
PRESTO!





21 / 21

To compute the view factor for radiative heat transfer, which radiation model is
used in CFD solver


Discrete Radiation Model
P1-Model
DTRM Model
Surface Radiation





Your score is

The average score is 57%


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