Local heat transfer coefficient around a cylinder
Hello,
I'm trying to get the local Nusselt number around one cylinder in an external air flow. (http://siam51.free.fr/air_flow.bmp) The mesh is fine enough to have y+~1 near the wall. I got the total temperature near the wall, the heat flux near the wall (W/mē) and the total heat flux exchanged (W) To calculate the local heat transfer coefficient, I tried two methods : h1 = [ heat flux near the wall (W/mē) ] / (383263) h2 = [ total heat flux exchanged (W) ] / (383total temperature near the wall) Values are completely different! h1~50450 h2~250600 I wonder what would be the best formula to use? Thanks in advance! 
You have to use static temperature in your calculation not the total temperature.
Quote:

Quote:
i have the same problem! but i have a problem in calculating the local heat transfer around the cylinder! should i choose some points by surfacepointcoordinate?i think cartesian coordinate isn't accurate! plz help me! thanks in advance! 
All times are GMT 4. The time now is 09:01. 