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Old   November 20, 2010, 02:27
Default Drag forces on a cylinder
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I'm simulating in ANSYS CFX , the flow past a 2D planar cylinder ( of course it is a Dummy 3D problem in CFX.). I've used the following expressions to calculate the Total drag force on the cylinder:

Total drag force = force_x()@cylinder.

Another total drag force =
areaInt(Wall Shear X)@cylinder + areaInt_x(p)@cylinder.

While working with these expressions, which area does CFX consider , the projected area of the cylinder(= Diameter * length) (or) its total surface area ?
Best regards,
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Old   November 20, 2010, 07:09
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It integrates over the surface, using the element faces as the things being summed up. So the areas being summed are the element face areas.
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