How to calculate heat transfer coefficient and nusselt numbers using COMSOL

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Sumon Saha

It depends on the expression of Nu. What is your boundary condition? isothermal or isoflux? See the attachment for sample calculation.

Asim Umer

Thanks a lot Dear Sumon Saha.

I am using constant heat flux on a SS tube. I am using copper nanofluids with DI water. If you don't mind i want to discuss some more issues related to my research i.e. Heat Transfer intensification using Nanofluids.