View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001437 | OpenFOAM | Bug | public | 2014-11-04 17:15 | 2015-02-25 13:23 |
| Reporter | Assigned To | henry | |||
| Priority | normal | Severity | minor | Reproducibility | have not tried |
| Status | closed | Resolution | no change required | ||
| Platform | Linux | OS | Rocks | OS Version | 6.1 |
| Summary | 0001437: Strange results in Lagrangian Particle Tracking when using cellPoint interpolation | ||||
| Description | I am using icoUncoupledKinematicParcelFoam to track particles in a steady flow field (Re=1000) through a bend pipe. The objective is to find the starting positions (at the inlet boundary) of those particles which will deposit during their flight through the bend. When I am using cellPointFace interpolation scheme for the fluid velocity interpolation I get excellent results (symmetry around the bend pipe symmetry plane - first figure). But when I use cellPoint interpolation the symmetry breaks, which is strange (second figure). Is this possibly due to some kind of bug in the cellPoint interpolation scheme implementation? Uploaded figures show the initial positions at the inlet boundary of deposited particles. In all cases we expect symmetry along the x-axis. | ||||
| Steps To Reproduce | I can send the test case if you ask it. | ||||
| Tags | No tags attached. | ||||
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2014-11-04 17:15
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There is no known bug in the cellPoint interpolation scheme. If the cellPointFace scheme is preferable for your case why not use it? Is there a reason why you would rather use the cellPoint scheme? If you would like this issue investigated further we will need a simple test case which reproduces the problem. |
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Thanks for the feedback. You are right, I can use the more accurate cellPointFace scheme. What questioned me back then was the asymmetry in the initial positions of the deposited particle, in contrast to the symmetry of the flow field. In other words, I expected that in a symmetrical flow field I would have the same particle trajectories in the two sides of the symmetry plane. Of course this might be due to the reduced accuracy of the interpolation scheme. Anyhow, I can send you the test case for further investigation if you think it's worth it. |
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If you would like this issue investigated further we will need a SIMPLE test case which reproduces the problem. If not I will close this report. |
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I 'll use cellPointFace in the future so you can close the report. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-11-04 17:15 |
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New Issue | |
| 2014-11-04 17:15 |
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File Added: figures.zip | |
| 2015-02-24 17:16 | henry | Note Added: 0003892 | |
| 2015-02-24 22:48 |
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Note Added: 0003902 | |
| 2015-02-25 11:19 | henry | Note Added: 0003904 | |
| 2015-02-25 12:41 |
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Note Added: 0003905 | |
| 2015-02-25 13:23 | henry | Status | new => closed |
| 2015-02-25 13:23 | henry | Assigned To | => henry |
| 2015-02-25 13:23 | henry | Resolution | open => no change required |
