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Drag force difference between Solver and Post

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Old   November 20, 2008, 18:50
Default Drag force difference between Solver and Post
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Dre
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I am interested in finding the drag force of a blunt body.

When the solution is solving, I create a new monitor for the force on the surface in the Z direction. When I go to CFX Post and use the function calculator to get the force in the Z direction for the surface, I get a different answer than the one in the solver.

So which one is right?
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Old   November 21, 2008, 10:59
Default Re: Drag force difference between Solver and Post
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Dre
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Could it be that CFX Post adds the viscous shear force? Because all of the drag forces in Post are higher then the ones in the Solver.
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Old   November 21, 2008, 13:02
Default Solved, I think
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Dre
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I pretty sure that the difference is in the shear force. I was previously working with very small velocities, so the impact of the shear force was big. But now I'm working with regular velocities, and the impact is negligible.
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