GATE ME 2021 Set 2 — Question 20
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Heat Transfer → Convection → Dimensionless Parameters
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Question
In forced convective heat transfer, Stanton number (), Nusselt number (), Reynolds number () and Prandtl number () are related as
Correct answer
(A) St = (Nu)/(Re Pr)
Solution
The Stanton number () is a dimensionless number that measures the ratio of heat transferred into a fluid to the thermal capacity of fluid. It is related to the Nusselt number (), Reynolds number (), and Prandtl number () by the following relationship:where:
- is the convection heat transfer coefficient
- is the density of the fluid
- is the velocity of the fluid
- is the specific heat capacity at constant pressure
- is the thermal conductivity
- is the dynamic viscosity
- is the kinematic viscosity
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