|
[Sponsors] |
February 19, 2010, 06:38 |
Subdivide flow in different outlets
|
#1 |
New Member
Mattia Bozzola
Join Date: Jan 2010
Posts: 2
Rep Power: 0 |
Hi!
I'm trying to simulate with OpenFoam a manifold with two exits. This manifold is controlled downhill by the turbines (one per exit) which impose the exit velocity. I would like to know if some of you know if it is possible to simulate this condition, and in this case how can I simulate it. I resume the boundary conditions: Inlet: I know the discharge. (i can assign the velocity of the flow) Outlet: I know the discharge at which the machines work. So it would be nice to assign some kind of subdivision of the flow. As a first try I imposed a condition of constant pressure (the same) in the outlets. It worked fine. But in my case the pressure should not be the same for both exits. I tried then to impose the pressure constant only on one exit (grad U zero) and on the other exit I imposed a constant velocity, with Grad P =0. I used the simpleFoam solver. The solution seems to work fine, but, after a certain number of steps it explodes. (p grows to infinity) Apparently it is a numerical problem, since physically the numbers seem acceptable. Are there any other type of boundary condition that allow me to simulate this situation? or the problem is in the solver? Thank you Last edited by effettonotte; March 16, 2010 at 03:55. Reason: I forgot an "s" in the title |
|
Tags |
boundary condition, manifold, pressure, simplefoam, solver |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
mass flow outlet??? | davy | FLUENT | 2 | August 18, 2010 07:18 |
ATTENTION! Reliability problems in CFX 5.7 | Joseph | CFX | 14 | April 20, 2010 15:45 |
Reversed flow at pressure outlet | Seeker Phil | FLUENT | 9 | January 2, 2010 05:21 |
pressure outlet (open channel flow) | Willem Brantegem | FLUENT | 2 | April 4, 2007 02:40 |
Terrible Mistake In Fluid Dynamics History | Abhi | Main CFD Forum | 12 | July 8, 2002 09:11 |