View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000625 | OpenFOAM | Bug | public | 2012-08-15 12:58 | 2012-09-06 10:11 |
| Reporter | maHein | Assigned To | henry | ||
| Priority | normal | Severity | major | Reproducibility | always |
| Status | closed | Resolution | no change required | ||
| Platform | Linux | OS | Debian | OS Version | 6.0 |
| Summary | 0000625: conjugate heat transfer - unequal temperature at coupled patches | ||||
| Description | The temperature fields at a coupled boundary patch do not match the temperature field of the adjacent coupled boundary patch of another mesh region. Both patches are defined as "mappedWall" with the "compressible::turbulentTemperatureCoupledBaffleMixed" boundary condition. | ||||
| Steps To Reproduce | Look at the following tutorial test case: $FOAM_TUTORIALS/heatTransfer/chtMultiRegionFoam/multiRegionLiquidHeater Use the Allrun script and compare the following temperature patch fields using Paraview: bottomWater_to_heater <---> heater_to_bottomWater rightSolid_to_topAir <---> topAir_to_rightSolid heater_to_topAir <---> topAir_to_heater The temperature distribution matches in none of these cases. I also tried the other CHT tutorials, same behaviour. | ||||
| Tags | No tags attached. | ||||
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The coupling in chtMultiRegion*Foam is explicit, i.e. it uses uptodate coefficients on either side when evaluating the coupled boundary condition. Only upon convergence will the temperatures/fluxes be equal. |
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what do you mean of 'upon convergence'?Do you mean upon the tolerance ?Is it enough to upon the tolerance of T only? |
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No, the whole system should be converged. Heat transfer is affected by local properties. E.g. heat transfer coefficient depends on turbulence which depends on the flow. Note that the multiRegionHeater tutorials are simplified cases and might not even be steady. |
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The reason for the unequal distribution was due to some odd behaviour of the reader plugin in paraview. The actual temperature fields were correct, but not correct displayed. Using another version of paraview, all CHT temperature fields match perfectly. This bug report can be closed. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2012-08-15 12:58 | maHein | New Issue | |
| 2012-08-20 08:48 |
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Note Added: 0001614 | |
| 2012-09-06 07:59 |
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Note Added: 0001672 | |
| 2012-09-06 09:09 |
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Note Added: 0001673 | |
| 2012-09-06 09:15 | maHein | Note Added: 0001674 | |
| 2012-09-06 09:15 | maHein | Note Edited: 0001674 | |
| 2012-09-06 10:11 | henry | Status | new => closed |
| 2012-09-06 10:11 | henry | Assigned To | => henry |
| 2012-09-06 10:11 | henry | Resolution | open => no change required |
