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-   -   Stagnation enthalpy vs. static enthalpy? (http://www.cfd-online.com/Forums/cd-adapco/53678-stagnation-enthalpy-vs-static-enthalpy.html)

BK March 3, 2004 08:17

Stagnation enthalpy vs. static enthalpy?
 
My case is transient, supersonic( inviscid flow), compressible flow. In methodology of STAR-CD, "stagnation enthalpy" is recommened as thermal calcualation. And we must determine stagnation temperature. But in my case temperature in INLET is varied from 300 to 5000K. How do I determine stagnation temperature? So, I used the "thermal enthalpy" option about above case. Isn't this result resonable?

Richard March 3, 2004 09:25

Re: Stagnation enthalpy vs. static enthalpy?
 
You should obtain good results with thermal enthalpy. Since the flow is high-speed, I would suggest total enthalpy, but I doubt the results will be much different. I don't think you can use stagnation enthalpy unless all the inflow boundaries have the same total enthalpy, which they don't in your case.

BK March 3, 2004 22:29

Re: Stagnation enthalpy vs. static enthalpy?
 
Thank you for kind answer, Richard.


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