View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0002045 | OpenFOAM | Bug | public | 2016-04-07 12:42 | 2016-04-07 14:57 |
| Reporter | fs1982 | Assigned To | henry | ||
| Priority | normal | Severity | major | Reproducibility | always |
| Status | resolved | Resolution | no change required | ||
| Platform | GNU/Linux | OS | Ubuntu | OS Version | 14.04 |
| Summary | 0002045: Unbounded alpha when using PIMPLE in multiphaseEulerFoam | ||||
| Description | If the bubbleColumn tutorial provided with OpenFoam for multiphaseEulerFoam is used and in fvSolution the value for nOuterCorrectors is set to a value higher than 1, the alpha values in the first time-step and the second PIMPLE-iteration will be much largerthan one. Interestingly, with reactingMultiphaseEulerFoam everything works fine. | ||||
| Steps To Reproduce | ./Allrun | ||||
| Tags | No tags attached. | ||||
|
|
|
|
|
In order to maintain boundedness of the phase-fraction the fluxes MUST be conservative. Thus if the alpha solution is included in the PIMPLE loop the pressure must be sufficiently well converged each time-step so it is unwise to use relTol. If I set p_rgh { solver GAMG; smoother DIC; nPreSweeps 0; nPostSweeps 2; nFinestSweeps 2; cacheAgglomeration true; nCellsInCoarsestLevel 10; agglomerator faceAreaPair; mergeLevels 1; tolerance 1e-8; relTol 0; } then your case runs correctly, at least in OpenFOAM-dev, I didn't test 3.0.x but it should be the same. |
|
|
I tested it with multiphaseEulerFoam in OF 3.0.x and you are right. Thank you for your help. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2016-04-07 12:42 | fs1982 | New Issue | |
| 2016-04-07 12:42 | fs1982 | File Added: bugReport.zip | |
| 2016-04-07 13:49 | henry | Note Added: 0006093 | |
| 2016-04-07 14:18 | fs1982 | Note Added: 0006094 | |
| 2016-04-07 14:56 | henry | Note Edited: 0006093 | |
| 2016-04-07 14:57 | henry | Status | new => resolved |
| 2016-04-07 14:57 | henry | Fixed in Version | => 3.0.x |
| 2016-04-07 14:57 | henry | Resolution | open => no change required |
| 2016-04-07 14:57 | henry | Assigned To | => henry |
