|
[Sponsors] |
December 14, 2003, 00:08 |
outlet pressure
|
#1 |
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 |
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 |
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 |
Guest
Posts: n/a
|
thanks:
|
|
December 20, 2003, 08:09 |
Re: outlet pressure
|
#5 |
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. |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Problems in pressure when using mass flow rate outlet | rafiktharwat | CFX | 11 | January 2, 2014 18:21 |
pressure oscillation near pressure outlet boundary | kino | Main CFD Forum | 5 | April 13, 2011 12:03 |
Pressure Outlet setting | CoG | STAR-CCM+ | 4 | June 9, 2010 22:47 |
what actually is the 'zero pressure outlet b. c.' | hwe001 | CFX | 4 | June 7, 2010 16:22 |
Backflow occuring at a pressure outlet? | Dave | FLUENT | 1 | August 12, 2004 18:39 |