View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0002500 | OpenFOAM | Bug | public | 2017-03-15 15:02 | 2017-03-22 18:41 |
| Reporter | olle | Assigned To | henry | ||
| Priority | normal | Severity | major | Reproducibility | always |
| Status | closed | Resolution | unable to reproduce | ||
| Platform | x86_64 | OS | CentOS | OS Version | 6.8 |
| Summary | 0002500: Heat equation source term behaviour differ in chtMultiRegionFoam and chtMultiRegionSimpleFoam | ||||
| Description | I have made a simple test case consising of an isolated solid "box" (there is actually two solids in the model in order to the the multi region approach to work). No fluid regions. The solid is 1x1x1 m and has an internal heat source implemented using fvOptions and the scalarSemiImplicitSource. The heat source is 1 W/m3. Boundaries of the box are either zeroGradient (which don't make sense in a steady state simulation with a constant source) or externalWallHeatFluxTemperature with constant heat transfer coefficient. Running first the transient solver with zeroGradient conditions I get the expected temprature increase rate of the box, corresponding to the power input of the source. Running then the transinet solver the heat transfer coefficient BC I also get the expected steady state temperature. But running the same case with the steady state solver gives no temperature rise at all. | ||||
| Steps To Reproduce | Run the provided test case with the two solvers using the Allrun script - alter system/box/changeDictionaryDict to change BC - alter system/controlDict to change solver - alter the fvSolution and fvSchemes files to fit the solver. | ||||
| Tags | chtMultiregionFoam, fvOptions, Heat transfer | ||||
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I ran the Allrun which failed due to problems with links in the system directory: fvSolution -> /home/setuotma/OpenFOAM/setuotma-4.1/run/sealHeat/sourceTestBox/system/box/fvSolution etc. I fixed these and the case ran with chtMultiRegionSimpleFoam but not chtMultiRegionFoam. Could you provide the script/setup you use for chtMultiRegionFoam? |
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injectionRateSuSp { h (1 0); } is a REALLY small injection rate of enthalpy, I would expect a REALLY small temperature rise which is what you get. If you set the "Su" value to something more reasonably you get the corresponding temperature rise. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2017-03-15 15:02 | olle | New Issue | |
| 2017-03-15 15:02 | olle | File Added: sourceTestBox.tar.gz | |
| 2017-03-15 15:02 | olle | Tag Attached: chtMultiregionFoam | |
| 2017-03-15 15:02 | olle | Tag Attached: fvOptions | |
| 2017-03-15 15:02 | olle | Tag Attached: Heat transfer | |
| 2017-03-20 18:28 | henry | Note Added: 0007953 | |
| 2017-03-20 18:37 | henry | Note Added: 0007954 | |
| 2017-03-22 18:41 | henry | Assigned To | => henry |
| 2017-03-22 18:41 | henry | Status | new => closed |
| 2017-03-22 18:41 | henry | Resolution | open => unable to reproduce |
