July 31, 2020 at 1:11 pmKeyur KanadeAnsys EmployeeI'm trying to hand calculate my wall fraction and heat transfer results for a boundary layer developed on a flat plate. I'm using the 1D correlations for these. I'm confused about the fluid properties. What temperature should I use to estimate my fluid properties?
July 31, 2020 at 1:11 pmprajputAnsys Employee
If the temperature difference between your wall and ambient fluid is small, you should be able to use the wall temperature or ambient fluid temperature to estimate the fluid properties. However, if the temperature difference is really large, I'd recommend that you use an arithmetic mean temperature between T_wall and T_amb. This average temperature is sometimes referred to as the 'film temperature' .
I hope this helps.
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