# Heat transfer coefficient calculation.

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 January 14, 2008, 12:58 Heat transfer coefficient calculation. #1 Jimmy Guest   Posts: n/a Hi guys, I am using Star-CD to simulate coolant flows. We need to input Tbulk when calculating the HCoefficient. From my understanding, Tbulk should be the bulk temperature relative to the reference temperature (not absolute temperature), but I didn't find anything from the Star-CD manuals to support this. Who can confirm this for me? Thanks, Jimmy

 January 14, 2008, 13:10 Re: Heat transfer coefficient calculation. #2 James Guest   Posts: n/a You could confirm it by getting the boundary heat flux, temperature and hcoeff for the same boundary cell and doing the calculation by hand. Alternatively work up a small OPERATE script to calculate Hcoeff for all boundaries then subtract Prostar's Hcoeff from it and confirm that all cells show essentially zero. I believe that you are correct in your understanding of Hcoeff.

 January 14, 2008, 13:17 Re: Heat transfer coefficient calculation. #3 Jimmy Guest   Posts: n/a Thank you very much for your help. Now I use the relative bulk temperature (Tbulk-Tref) to calculate the Hcoefficient, the result looks reasonable.

 February 19, 2008, 17:53 Re: Heat transfer coefficient calculation. #4 alaa fra Guest   Posts: n/a softwar

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