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Old   February 24, 2013, 12:47
Default Thrust Calculation
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Orb
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Hi,

I have a rotating machinery with one inlet and one outlet. If I want to find the total thrust force do I just use the Force(Z)-out function? Or do I subtract Force(Z)-out from Force(Z)-in? Which is more a more reasonable result?

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Old   March 1, 2013, 22:11
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Erik
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Should be the net of your control volume shouldn't it? So out minus in?
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Old   March 1, 2013, 22:42
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Great suggestion. Although, I am unsure how ANSYS CFX calculates the force... maybe it already factors in the Force of air in, or maybe not.
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Old   March 3, 2013, 00:02
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Doesn't it actually make sense to add them both? Force of fluid (air) through the inlet should be added to force of fluid (air) leaving the outlet... Both forces in the same direction...
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