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how to add body force in a duct

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Old   March 27, 2004, 23:13
Default how to add body force in a duct
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Hi, I am trying to simulate the flow in a duct with a small fan. Since I don't care the details of the fan, I would like to simulate the fan using an axial body force in the duct at the fan.Does anyone know how to add a body force in FLUENT? Suppose I know the pressure ratio of the small fan.
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