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The numerical solution is obtained in COMSOL Multiphysics by using the Conjugate Heat Transfer interface, which couples the fluid flow and heat transfer phenomena. Schematics of laminar flow (top) and turbulent flow (bottom) past a horizontal plate. Mathematically, his the ratio of the heat flux at the wall to the temperature difference between the wall and fluid i.e., The heat transfer coefficient is indicative of the effectiveness for the rate of heat transport through a domain between the surface and the fluid. The rate at which heat transfer occurs in both cases is governed by a temperature difference and a proportionality coefficient called the heat transfer coefficient. Similarly, convection is the primary mode of heat transport in the case of two fluids (through a solid surface), such as with heat exchangers. Heat transfer in the fluid is predominantly governed by convection. Let us consider a heated wall or surface over which a fluid is flowing. In this blog post, we discuss and demonstrate how the COMSOL Multiphysics® software can be used to evaluate the heat transfer coefficient for plate geometries. ![]() ![]() Often determined with the aid of correlations and empirical relations, the heat transfer coefficient provides information about heat transfer between solids and fluids. In many engineering applications involving conjugate heat transfer, such as designing heat exchangers and heat sinks, it’s important to calculate the heat transfer coefficient.
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