Reply To: Unrealistic Heat Transfer Coefficient and Total Surface Heat Flux values

[w.u.maddumage]

Hi Federico, 

Thanks for the quick reply. I used the Surface Heat Transfer coefficient to get the above values. The reference temperature I used was the coolant oil inlet temperature. Could you please clarify a few points, 

1. When you said ''y+ based HTC and Ref. Temperatures'', do you mean the second method defined in Defining heat transfer coefficient (HTC) - Ansys Knowledge. Where HTC is defined as, HTC =(‘Total Surface Heat Flux’ – ‘Radiation Heat Flux’)/(‘Wall Temperature (outer surface)’ – ‘Static Temperature’).
   
   
2. You mentioned this method cannot be used in closely meshed fins. In my geometry, I do have a closely spaced area (clearence 0.25 mm). Is there a way to figure out whether y+ reaches 300 or not within this 0.25 mm gap?

Best,

Waruna