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#1 |
Member
Muzio Grilli
Join Date: Mar 2009
Posts: 36
Rep Power: 17 ![]() |
Hi guys thanks for all the hints you gave me,now i can run rhoSimpleFoam solver and it gives good results, but now i have a new problem.
I'm triyng to test OpenFoam comparing the results it gives in naca0012 profile analisys, i need to calculate lift and drag coefficients but for the drag coefficient it always gives me zero. When i run the application it needs transport properties so i insert the file in the constant directory maybe i need to specify some more files? So i decided to visualize stressComponents but when i run this application it says that there is a dimensional difference between the two members of the equation. Someone can give me some hints? |
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#2 |
Senior Member
Mattijs Janssens
Join Date: Mar 2009
Posts: 1,419
Rep Power: 26 ![]() |
Probably the liftDrag app does not pick up your reference length and area correctly. You might need to have a look at the application itself and change its calculation.
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#3 |
Member
Muzio Grilli
Join Date: Mar 2009
Posts: 36
Rep Power: 17 ![]() |
I Mattijs i looked at the application and i saw that if i calculate the value
(pressureCoeff + viscousCoeff) & flowDirection) two times before the return it gives a drag coefficient different from zero(I don't know if it is good or not but it's a value). otherwise it gives a value that seems to be casual |
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Thread | Thread Starter | Forum | Replies | Last Post |
Lift & Drag | John | FLUENT | 4 | May 3, 2007 05:57 |
Lift and Drag | Pedro Lopes | CFX | 1 | February 19, 2007 08:18 |
Lift and drag | daniel | CFX | 1 | March 27, 2006 10:14 |
Drag and Lift | Daniel Fisher | Phoenics | 2 | April 8, 2005 03:51 |
Lift and drag | Karim Ozar | Main CFD Forum | 4 | March 9, 2000 02:35 |