|
[Sponsors] |
April 29, 2009, 08:52 |
pressure oscillations in moving mesh cases
|
#1 |
Member
David Hora
Join Date: Mar 2009
Location: Zürich, Switzerland
Posts: 63
Rep Power: 17 |
Hi all
I'm trying to simulate a pump (inlet casing, rotating impeller, diffuser and volute) with OpenFOAM-1.5-dev. The four domains are connected with GGI interfaces. The turbDyMFoam solver is used as it is a transient simulation. The forces acting on the hub, shroud and blades are monitored with the forces functionObject. Unfortunately the pressure forces oscillate with each time step. The attached image shows the pressure forces in y-direction. Rotation axis is the z-axis. I could reproduce this behaviour in the icoDyMFoam tutorial cases mixerGgi and mixer2D. I tried to use different ddt-Schemes (Euler, backward, CrankNicholson) and tolerances without any improvement. Are there any possibilities to reduce the oscillations? Thanks in advance David |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Problem with moving mesh | Sully | FLUENT | 7 | September 11, 2008 00:38 |
How to make boundary layer mesh moving with wall | wayne | FLUENT | 3 | June 11, 2008 23:23 |
Does star cd takes reference pressure? | monica | Siemens | 1 | April 19, 2007 11:26 |
moving mesh | haribalan | CFX | 1 | June 6, 2006 08:26 |
Moving Mesh and MRF | Romain | FLUENT | 1 | May 16, 2002 03:45 |