[Saima]

hello,

I am working on co-rotating disc flow analysis. Using Spalart-Allmaras.
PInlet= total pressure: 3MPa
T1= 280 K
Poutlet: average pressure= 7 Mpa
To= 280 K
Rotaional speed: 10000 rpm

What parameters i need to modify, can anyone tell me by looking convergence history?

[lcarasik]

Originally Posted by Saima

hello,

I am working on co-rotating disc flow analysis. Using Spalart-Allmaras.
PInlet= total pressure: 3MPa
T1= 280 K
Poutlet: average pressure= 7 Mpa
To= 280 K
Rotaional speed: 10000 rpm

What parameters i need to modify, can anyone tell me by looking convergence history?

Where are you encountering reversed flow and do you know where in the domain is contributing to the high residuals?

[Saima]

Originally Posted by lcarasik

Where are you encountering reversed flow and do you know where in the domain is contributing to the high residuals?

Yes, its both inlet and outlet.

[lcarasik]

Originally Posted by Saima

Yes, its both inlet and outlet.

Add a length of pipe to the inlet and outlet using the extension mesher. This should help reduce backflow.

[rayjanghyun]

i think u need to grow more layer mesh near its boundary...