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February 6, 2009, 18:58 |
Hi,
I am simulating laminar
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Member
Daniel Harlacher
Join Date: Mar 2009
Location: Davis, CA, United States
Posts: 60
Rep Power: 17 |
Hi,
I am simulating laminar flow around a sphere (Re = 50 - 300) and I was wondering if someone has done a similar computation as well. My Problem is that I am getting a very good looking pressureplot, but my Drag is just too high. If someone has a case setup that produces confirmed lift and drag values for whatever shaped object (2D or 3D) in OF 1.5 I would be very interested, because I don't seem to get it to work properly. I pretty much read through the "Lift/Drag in 1.5" Thread but I am open for any suggestion. the Data right now is: sphere: Diameter: 1m transportProperties: nu 1.5e-05 controlDict: functions ( forces { type forces; functionObjectLibs ("libforces.so"); //Lib to load patches (sphere_GmshSphere); // change to your patch name rhoInf 1.22; //Reference density for fluid CofR (0 0 0); //Origin for moment calculations } forceCoeffs { type forceCoeffs; functionObjectLibs ("libforces.so"); patches (sphere_GmshSphere); //change to your patch name rhoInf 1.22; CofR (0 0 0); liftDir (0 1 0); dragDir (1 0 0); pitchAxis (0 0 0); magUInf 0.000753; lRef 1; Aref 0.785398; } ); Hope you can help me somehow... Thanks a lot - harly |
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