GATE ME 2022 Set 2 — Question 25
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Heat Transfer → Convection → Dimensionless Parameters
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Question
Which of the following non-dimensional terms is an estimate of Nusselt number?
Correct answer
(C) Non-dimensional temperature gradient
Solution
The Nusselt number () is defined as the ratio of convective to conductive heat transfer across a boundary. In non-dimensional form, it is expressed as the temperature gradient at the surface: .
- Option (A) describes the Biot number ().
- Option (B) describes the Peclet number ().
- Option (C) is the correct definition of the Nusselt number in terms of non-dimensional temperature gradient.
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