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August 3, 2016, 06:30 |
co-efficient of drag and lift
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#1 |
Member
subhankar
Join Date: May 2016
Posts: 36
Rep Power: 9 |
Hi everyone,
I have started using openFoam since last two months. I am studying flow past a cylinder kept between two infinitely large plates. Reynolds no. is 500 and strouhal no. is 0.18.I want to get the co-efficient of drag and lift. How can i get the values?Also can you suggest appropriate boundary conditions. Thanks in advance. regards Subhankar |
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August 4, 2016, 10:43 |
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#2 |
Senior Member
Join Date: Sep 2010
Posts: 226
Rep Power: 16 |
Hi,
You can get them by forces functions to place inside system/controDict. For example, if you look to /tutorials/compressible/sonicFoam/ras/nacaAirfoil/system/controlDict you will fine the following: Code:
functions { forces { type forceCoeffs; libs ( "libforces.so" ); writeControl timeStep; writeInterval 1; patches ( WALL10 ); log true; rhoInf 1; CofR (0 0 0); liftDir (-0.239733 0.970839 0); dragDir (0.970839 0.239733 0); pitchAxis (0 0 1); magUInf 618.022; lRef 1; Aref 1; } } Regards, T.D. |
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