View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001293 | OpenFOAM | Bug | public | 2014-05-13 17:08 | 2020-11-21 20:30 |
| Reporter | dhora | Assigned To | henry | ||
| Priority | normal | Severity | feature | Reproducibility | N/A |
| Status | closed | Resolution | suspended | ||
| Summary | 0001293: Improvement of moving (rotating) mesh cases | ||||
| Description | Dear developers I'm using a SIMPLE based solver (transientSimpleDyMFoam) together with OpenFOAM-2.2.x for simulations of centrifugal pumps and discovered that the rotation of the mesh leads to a quite strong distortion of the pressure and velocity fields (e.g. torque increased by 18% after the first corrector loop in one of our cases). I tried to reduce this distortion by rotating the corresponding part of the velocity field with the mesh before the momentum equations are being solved. The idea was that such a modification could simplify the computation of the final solution if we have more or less steady conditions in the rotating domain. The results are quite interesting: reduced distortion of the solution (torque only increased by 4% after the first corrector loop), lower residuals, less iterations and a reduced computation time. The source code (not perfect but working) and a presentation with results of a 2D mixer and a single channel pump can be found here: http://www.extend-project.de/user-forums/extend-groups/14-special-interest-group-on-turbomachinery-group-forum/658-improvement-of-transientsimpledymfoam The modification seems to be a clear improvement and could also be useful for pimpleDyMFoam simulations in OpenFOAM-2.3. Best regards David | ||||
| Additional Information | The monitoring of the values had to be implemented in the solver. A more general approach would still be desirable (http://www.openfoam.org/mantisbt/view.php?id=641). The movingWall boundary condition provides inaccurate results for walls in rotating domains. It's not a burning issue but you can see it if you calculate the relative velocities in the rotating domain. It would require a new boundary condition but could be solved easily. | ||||
| Tags | No tags attached. | ||||
