# a problem in calculating pressure drop in Fluent?

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 May 17, 2004, 23:46 a problem in calculating pressure drop in Fluent? #1 yu chun Guest   Posts: n/a May I ask you a question about how to calculate pressure drop in a long tube(acutually there is a big reservior in the middle). I got some converged results and evaluated pressure drop(P_inlet - P_outlet). When I calculated each of inlet and outlet pressures, these results are like: Area-Weighted Average Static Pressure (pascal) -------------------------------- -------------------- outlet_pressure 0 Area-Weighted Average Static Pressure (pascal) -------------------------------- -------------------- inlet_velocity 386.72406 I think the net prssure(or pressure drop) is ~387 pascal. However, when I cosidered both of inlet and outlet pressures, the result(net or pressure drop) is different as before. Area-Weighted Average Static Pressure (pascal) -------------------------------- -------------------- inlet_velocity 386.72406 outlet_pressure 0 Net 193.36203 Net pressure=193. Why do these happen? Or net pressure and prssure drop are different? How can I calculate pressure drop from a point 1 to a point 2 in Fluent? Thanks for your answer in advance.

 May 18, 2004, 04:40 Re: a problem in calculating pressure drop in Flue #2 George Guest   Posts: n/a the "Net pressure" is just an average (again area-weighted) from all surfaces you have selected. Bye George

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