GATE ME 2015 Set 3 — Question 21
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Heat Transfer → Convection → Dimensionless Parameters
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Question
The ratio of momentum diffusivity () to thermal diffusivity (), is called
Correct answer
(A) Prandtl number
Solution
The Prandtl number () is a dimensionless number defined as the ratio of momentum diffusivity (kinematic viscosity, ) to thermal diffusivity ():It provides a measure of the relative thickness of the velocity and thermal boundary layers.
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