एक पाइप के लैमिनार प्रवाह में, अधिकतम वेग ______पर होता है।

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UKPSC JE Civil 8 May 2022 Official Paper-II
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  1. परिधि
  2. केन्द्र
  3. अनुभाग में एकसमान
  4. उपरोक्त में से कोई भी नहीं

Answer (Detailed Solution Below)

Option 2 : केन्द्र
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वृत्ताकार पाइप के माध्यम से श्यान तरल पदार्थ के प्रवाह का वेग वितरण:

\(u\left( r \right) = - \frac{1}{{4\mu }}\frac{{\partial p}}{{\partial x}}\left[ {{R^2} - {r^2}} \right]\)

जब r = 0 होता है अर्थात पाइप के केंद्र पर वेग अधिकतम होता है।

\({u_{max}} = - \frac{1}{{4\mu }}\frac{{\partial p}}{{\partial x}}{R^2}\)

औसत वेग:

\({u_{avg}} = \left( {\frac{1}{{8\mu }}} \right)\left( { - \frac{{\partial p}}{{\partial x}}} \right){R^2}\)

\(\frac{{{u_{max}}}}{{{u_{avg}}}} = 2.0\)

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