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November 20, 2010, 02:27 |
Drag forces on a cylinder
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#1 |
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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 ?
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Best regards, Santhosh. |
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November 20, 2010, 07:09 |
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#2 |
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Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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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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