GATE ME 2015 Set 1 — Question 18
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Heat Transfer → Convection → Thermal Boundary Layer
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Question
For flow of viscous fluid over a flat plate, if the fluid temperature is the same as the plate temperature, the thermal boundary layer is
Correct answer
(D) not formed at all
Solution
A thermal boundary layer is a region in a fluid flow where temperature gradients exist due to heat transfer between a surface and the fluid. If the fluid temperature () is the same as the plate temperature (), there is no temperature difference and no heat transfer occurs. Consequently, no temperature gradient develops in the fluid, and a thermal boundary layer is not formed at all.
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