outlet pressure

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 December 14, 2003, 00:08 outlet pressure #1 grad-student Guest   Posts: n/a Can somebody point me to a reference where computational implementation of specified pressure condition at outlet is described..or a code on net where it is programmed..or brief steps... ...do I still specify dv/d(streamwise) =0 to v-equattion solver like in normal outflow condition (zero u v gradient)..

 December 14, 2003, 23:02 Re: outlet pressure #2 Keith Guest   Posts: n/a As far as I know, if you are working on incompressible fluid, the necessary pressure term is your hydrostatic pressure at the outlet boundary. Correct me if I am wrong, I personally think that the pressure doesn't mater. It is the pressure gradient that drives the flow(go back to fundamental N-S equation). Hope that helps. keith.

 December 15, 2003, 05:47 Re: outlet pressure #3 barbaro Guest   Posts: n/a Try this book: Versteeg and Malalasekera, An Introduction to Computational Fluid Dynamics, pag. 203

 December 18, 2003, 00:19 Re: outlet pressure #4 grad Guest   Posts: n/a thanks:

 December 20, 2003, 08:09 Re: outlet pressure #5 kenn Guest   Posts: n/a once you use partial u and v partial streamline-wise = 0, you should not specified pressure anymore. if you want to use pressure Open boundary conditions, you may have to drop velocity OBC. because, otherwise OBC you provide may conflict each other, and the discrete system may become highly ill-posed.

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