View Issue Details
ID | Project | Category | View Status | Date Submitted | Last Update |
---|---|---|---|---|---|
0002866 | OpenFOAM | Bug | public | 2018-03-05 11:04 | 2018-03-07 21:38 |
Reporter | rob3rt 0ng | Assigned To | henry | ||
Priority | normal | Severity | minor | Reproducibility | always |
Status | closed | Resolution | no change required | ||
Platform | Unix | OS | Other | OS Version | (please specify) |
Summary | 0002866: Something is critically wrong with the small3dPoolFire tutorial, maybe also with other related density-injection cases | ||||
Description | There is an inherent glitch or bug when specifying the amount of fuel injection in the poolFire3D tutorial case. Regardless of the amount of injection I use, I always obtain the same temperature, velocity and flame length. For example, the flow properties and thermal characteristics of a fire due to accident or bushfire (for example 100 MW) are significantly different than if a lighter (~50 W). However, according to the tutorial they are the same. | ||||
Steps To Reproduce | Change the value of heat release rate or velocity injection of CH4 (0/U) by two or three order of magnitude (i.e. from (0 0.01 0) to (0 0.00001 0)), and you will see almost no difference in terms of temperature, velocity and flame length. | ||||
Tags | poolFire | ||||
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Note that diffusion is permitted through fixedValue boundary condition so even if you set the velocity to 0 fuel will still enter from the inlet. |
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I have run the case with and without inlet velocity and the results are as I would expect, the plume is enhanced by the inlet velocity. Would you rather the case were changed to have a zero inlet so that all fuel entry is by diffusion? |
Date Modified | Username | Field | Change |
---|---|---|---|
2018-03-05 11:04 | rob3rt 0ng | New Issue | |
2018-03-05 11:04 | rob3rt 0ng | Tag Attached: poolFire | |
2018-03-06 00:02 | henry | Priority | immediate => normal |
2018-03-06 00:02 | henry | Severity | major => minor |
2018-03-06 00:06 | henry | Note Added: 0009371 | |
2018-03-06 10:00 | henry | Note Added: 0009374 | |
2018-03-07 21:38 | henry | Assigned To | => henry |
2018-03-07 21:38 | henry | Status | new => closed |
2018-03-07 21:38 | henry | Resolution | open => no change required |