View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0003141 | OpenFOAM | Bug | public | 2018-12-27 06:39 | 2018-12-31 16:25 |
| Reporter | dominic.chandar | Assigned To | henry | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | unable to reproduce | ||
| Platform | GNU/Linux | OS | Ubuntu | OS Version | 15.04 |
| Summary | 0003141: Moment calculation defaults to Zero Centre of Rotation, rigidBodyDynamics | ||||
| Description | in OpenFOAM/src/rigidBodyMeshMotion/rigidBodyMeshMotion/rigidBodyMeshMotion.C : 282 forcesDict.add("CofR", vector::zero); The Centre of rotation seems to default to vector::zero in contrast with the older sixDoF library ( OpenFOAM/src/sixDoFRigidBodyMotion/sixDoFRigidBodyMotionSolver/sixDoFRigidBodyMotionSolver.C: 223) forcesDict.add("CofR", motion_.centreOfRotation()); | ||||
| Additional Information | Present in 4.x, 5.0, 5.x, dev versions | ||||
| Tags | No tags attached. | ||||
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What is the consequence of this difference? Which do you prefer? Do you have any cases which show a difference in behavior? Steps to reproduce etc.? |
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Let's say I have a simple blade whose hub or centre is located at a point (5,5,5) and I am computing the rotation from the moments (Torque) (1-DoF motion). With a zero centre of rotation, the moments would be incorrect. Instead, the moments have to be calculated w.r.t the point (5,5,5). |
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This all depends on the coordinate system used. Please provide equivalent cases which demonstrate a difference in behavior. |
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Please open another report when you can supply a case which demonstrates the issue. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2018-12-27 06:39 | dominic.chandar | New Issue | |
| 2018-12-27 08:16 | henry | Priority | urgent => normal |
| 2018-12-27 08:16 | henry | Severity | major => minor |
| 2018-12-27 08:18 | henry | Note Added: 0010235 | |
| 2018-12-27 08:29 | dominic.chandar | Note Added: 0010236 | |
| 2018-12-27 08:40 | henry | Note Added: 0010237 | |
| 2018-12-31 16:25 | henry | Assigned To | => henry |
| 2018-12-31 16:25 | henry | Status | new => closed |
| 2018-12-31 16:25 | henry | Resolution | open => unable to reproduce |
| 2018-12-31 16:25 | henry | Note Added: 0010248 |
