View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001349 | OpenFOAM | Bug | public | 2014-07-11 20:44 | 2015-02-25 13:22 |
| Reporter | billie | Assigned To | henry | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | Linux | OS | Ubuntu | OS Version | 13.10 |
| Summary | 0001349: Probes and sampledSet/cloud do not always find element containing probe location while sampledSet/polyLine does | ||||
| Description | It seems when the coordinates lie on element boundaries no element is found for the probed location. The following warning occurs for some locations with the probes function object: --> FOAM Warning : From function findElements::findElements(const fvMesh&) in file probes/probes.C at line 111 Did not find location (0.055 -0.006 0) in any cell. Skipping location. For the sampled set function object of type cloud no warning is printed. The attached case contains a controlDict with four different functions. Function name: probe_Temperature_1 Description: Probes with probe locations on/near element boundaries Result: some elements are not found Function name: probe_Temperature_2 Description: Probes with probe locations slightly shifted so they do not lie on element boundaries Result: all elements are found Function name: probe_Temperature_3 Description: Set of type cloud with probe locations on/near element boundaries Result: some elements are not found Function name: probe_Temperature_4 Description: Set of type polyLine with probe locations on/near element boundaries Result: all elements are found Probe locations for which no element is found: (0.055 -0.006 0) (0.075 -0.006 0) (0.08 -0.006 0) (0.09 -0.006 0) | ||||
| Steps To Reproduce | It should be possible to reproduce the issue with the attached case. I tried to generate a smaller test-case but I was not able to reproduce the issue with a mesh generated by blockMesh. | ||||
| Tags | functionObject, Post-processing, probes, sample | ||||
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I can confirm this behaviour. When I specify a probe, it happens that some locations are not found. Moving the probe a small distance, for example 1e-3, resolves the problem. The same happens with sampling lines, sometimes a point is not found, and moving the line slightly resolves everything. Even tough this bug is possible to work around, it is very annoying and it should be fixed. Especially when doing scripted post-processing, then these "manual" corrections are extremely difficult to handle. In case the test cases supplied are not sufficient, I can provide more cases where this problem arises. Update: The problem is also described here: http://www.cfd-online.com/Forums/openfoam-pre-processing/124412-probe-warning-probe-does-not-work.html |
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I also observe the same behaviour in parallel simulations, with a mesh generated successively using blockMesh and refineHexMesh. Manually shifting the probes did the trick, but this is very cumbersome. |
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Could you test with the latest commit to OpenFOAM-2.3.x: commit 3321553039b607239b3d46121c1976546dc1a1b0 polyMesh::findCell: Add support for octree search and cell tet-decomposition Make this new method the default so that probes find the locations more reliably Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1544 |
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Now all points are found for my case. Thanks for taking care of this issue. |
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Fixed in OpenFOAM-2.3.x |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-07-11 20:44 | billie | New Issue | |
| 2014-07-11 20:44 | billie | File Added: test.tar.xz | |
| 2014-07-11 20:47 | billie | Tag Attached: functionObject | |
| 2014-07-11 20:48 | billie | Tag Attached: Post-processing | |
| 2014-07-11 20:48 | billie | Tag Attached: sample | |
| 2014-07-11 20:48 | billie | Tag Attached: probes | |
| 2014-10-14 11:18 |
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Note Added: 0003248 | |
| 2014-10-14 11:29 |
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Note Edited: 0003248 | |
| 2015-01-20 16:04 |
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Note Added: 0003572 | |
| 2015-02-24 17:11 | henry | Note Added: 0003891 | |
| 2015-02-25 12:55 | billie | Note Added: 0003906 | |
| 2015-02-25 13:22 | henry | Note Added: 0003907 | |
| 2015-02-25 13:22 | henry | Status | new => resolved |
| 2015-02-25 13:22 | henry | Resolution | open => fixed |
| 2015-02-25 13:22 | henry | Assigned To | => henry |
