Are the heat transfer coefficients for the heat exchanger for the fluid or the pipe?

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The Simscape block "Heat Exchanger (G-TL)" has parameters called "Gas-wall heat transfer coefficient" and "Liquid-wall heat transfer coefficient" under its settings for Gas 1 and Thermal Liquid 2 respectively. The unit is (W/m^2 *K). Is this meant to be a property of the pipes holding the fluids or the fluids themselves? The help page didn't seem to have the answer.

Answers (1)

Shanmukha Voggu
Shanmukha Voggu on 28 Oct 2021
Hi Claud,
Heat transfer coefficient depends on both the thermal properties of a medium, the hydrodynamic characteristics of its flow, and the hydrodynamic and thermal boundary conditions and Heat transfer coefficient is not a thermo-physical property for the fluid as it is dependent on the temp gradient at the solid-fluid interface.
Refer this for more information.


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