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Forum: OpenFOAM Running, Solving & CFD

October 14, 2013, 04:10

Replies: 31

Problem in simpleFoam airFoil2D forceCoeffs

Views: 17,323

Posted By Rafael_Coelho

Check your liftdir and dragdir axis. It depends...

Check your liftdir and dragdir axis. It depends on your geometry.

Forum: OpenFOAM Running, Solving & CFD

July 28, 2013, 04:52

Replies: 31

Problem in simpleFoam airFoil2D forceCoeffs

Views: 17,323

Posted By Rafael_Coelho

Changing the liftDir and dragDir as suggested by...

Changing the liftDir and dragDir as suggested by tcarrigan:

functions
{
forces
{
type forceCoeffs;
functionObjectLibs ( "libforces.so" );
outputControl timeStep;
outputInterval 1;

Forum: OpenFOAM Running, Solving & CFD

July 28, 2013, 04:33

Replies: 31

Problem in simpleFoam airFoil2D forceCoeffs

Views: 17,323

Posted By Rafael_Coelho

I just ran the airFoil2D case and I got the...

I just ran the airFoil2D case and I got the following results:

forceCoeffs output:
Cm = -15.2719
Cd = -0.231827
Cl = 1.85603
Cl(f) = -14.3439
Cl(r) = 16.2
...

Forum: OpenFOAM Running, Solving & CFD

July 22, 2013, 17:28

Replies: 31

Problem in simpleFoam airFoil2D forceCoeffs

Views: 17,323

Posted By Rafael_Coelho

I just re-installed Openfoam and will run the...

I just re-installed Openfoam and will run the airfoil case as a benchmark. Will post some results late this week.

Forum: OpenFOAM Running, Solving & CFD

July 15, 2012, 07:19

Replies: 31

Problem in simpleFoam airFoil2D forceCoeffs

Views: 17,323

Posted By Rafael_Coelho

Thank you tcarrigan. It makes sense now. I...

Thank you tcarrigan.

It makes sense now. I am using the same code on the wigley tutorial. But the values are very wrong. Do you know if Aref should be the total area or only the wetted (water...

Forum: OpenFOAM Running, Solving & CFD

July 12, 2012, 15:42

Replies: 31

Problem in simpleFoam airFoil2D forceCoeffs

Views: 17,323

Posted By Rafael_Coelho

junkie71189 thanks for your reply. I think the...

junkie71189 thanks for your reply. I think the force is given for the whole surface, so the Cd and Cl are already integrated, right?

tcarrigan, How are you getting these values? Could you please...

Forum: OpenFOAM Running, Solving & CFD

July 8, 2012, 16:08

Replies: 31

Problem in simpleFoam airFoil2D forceCoeffs

Views: 17,323

Posted By Rafael_Coelho

I am facing the same problem. Any news of how to...

I am facing the same problem. Any news of how to get the right Cl Cd?

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