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how can caclulate forceCoeffs of force.dat file after finishing analysis |
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May 14, 2013, 04:49 |
how can caclulate forceCoeffs of force.dat file after finishing analysis
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#1 |
Senior Member
saeideh mohamadi
Join Date: Aug 2012
Posts: 229
Rep Power: 14 |
Hi dear Foamers,
i am analyzing the incompressible flow over a Naca 4412 airfoil, my analysis has been converged at 534th step.now i have a folder that the results for forces are in it, the last line of "force.dat" file is : """# Time forces(pressure, viscous) moment(pressure, viscous) 534 (((1.49508 -6.67508e-18 101.445) (1.17413 2.86026e-21 -0.0507981)) ((-20.2891 1.94745 0.299016) (0.0101596 -0.0244948 0.234827)))""" my Question is that how could i use the number of "forces(pressure, viscous)" to calculate the "cd and cl" or "moment(pressure, viscous)" to compute "cm" ?? please help me understand the issue, thank you very much Regards. |
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May 26, 2013, 02:08 |
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#2 |
Senior Member
Tarak
Join Date: Aug 2010
Location: State College, PA
Posts: 111
Rep Power: 15 |
Check the forceCoeffs directory
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May 26, 2013, 08:20 |
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#3 |
Senior Member
saeideh mohamadi
Join Date: Aug 2012
Posts: 229
Rep Power: 14 |
Hi Tarak;
i know that we have forceCoeffs function that also is written in controlDict, that give us, CD, and CL but now i wana know with this forces how could we calculate "CD and CL and CM" would you please give me more explenation, thank you very much |
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