CFD's poor prediction of Recuperation temperature -- CFD Online Discussion Forums

April 3, 2001, 23:25	CFD's poor prediction of Recuperation temperature	#1
Om. Guest Posts: n/a	Hi, I am studying a case of internal air flow through a nozzle, and my solver doesn't predict correctly the recuperation temperature (temperature at the wall). I also made tests with Pr = 1, so I should obtain Tr=Ts (Stagnation temperature) but the prediction is very poor (Tr is 10 degrees higher Ts). Can someone suggests why everyone says "It is a difficult task to to obtain accurate temperature at the wall" and why CFD solvers find this difficulty ? thank you, Om.

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