Pressure loss prediction
Hallo..
I have a case of pressure loss prediction of a control valve (3d problem). 4 boundary areas: -Inlet section (condition: pressure inlet) -Outlet section (condition: ????) -Pipe wall (condition: wall) -Valve disc wall (condition: wall) My input are: -Geometry -Inlet flow data (p,T,W..) I want to obtain the valve outlet pressure using K-Epsilon. What's the best way for you? What conditition can I set (best way) for the outlet section? Thanks a lot... |
Re: Pressure loss prediction
See if this demo helps you.. although this is in CFX but could help you...
http://www-harwell.ansys.com/demoroo...ls.php?id=8,31 In your case you could use: Inlet velcity BC Outlet pressure BC (0 value) Pressure drop will be pressure developed at inlet. Thanks, AJ |
Re: Pressure loss prediction
Well,
The "inverse" medology (inlet velocity-outlet pressure) is very nice, I will try it now for the CV prediction.... The CFX demo is nice too, but I think it's very simple because the input data are the inlet total pressure and the outlet staic pressure: INLET: Total pressure = 12psi OUTLET: Average static pressure (0Pa) Thank you Kind Regards Ivan |
Re: Pressure loss prediction
Ok,
case with inlet velocity and outlet pressure: I tried a inviscid test and the results are great! Of course, I can't evaluate the pressure drop by inviscid calculation bat I think the guideline is ok. Now I have K-Epsilon convergence problems, but i hope it's a grid problem..... We'll see... Thank you |
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