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Navier Stokes equation with source steady-state

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Old   January 12, 2011, 21:54
Post Navier Stokes equation with source steady-state
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I have a Navier-Stokes equation with steady-state.When I was a student,I solved this problem do not have a source.But now,I must solve with source and that source is pressure gradient.But I do not have source directly, I just have a mass flow rate \dot{m}=\rho*u*S.I do not know how to find this source?
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