View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0003936 | OpenFOAM | Bug | public | 2022-11-27 12:30 | 2022-11-28 14:17 |
| Reporter | nucerl | Assigned To | henry | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | GNU/Linux | OS | Other | OS Version | (please specify) |
| Product Version | 10 | ||||
| Fixed in Version | dev | ||||
| Summary | 0003936: The implemented Weber Number (We) in the IATE model should be a function of Turbulent Fluctuation Velocity, Ut | ||||
| Description | 1 Foam::tmp<Foam::volScalarField> Foam::diameterModels::IATEsource::We() const 2 { 3 return 4 otherPhase().rho()*sqr(Ur())*phase().d()/sigma(); 5 } The returned We in IATEsource.C seems be a function of Relative Velocity, Ur, however in the actual reference model it should be a function of Turbulent Fluctuation Velocity, Ut. In general, Ut is generally used in the We number. Though numerically it does not make a huge difference for a specific case shown in the uploaded screenshot below, the correct form should be implemented for lower We cases. | ||||
| Steps To Reproduce | 1 Foam::tmp<Foam::volScalarField> Foam::diameterModels::IATEsource::We() const 2 { 3 return 4 otherPhase().rho()*sqr(Ut())*phase().d()/sigma(); //ebicer 5 } | ||||
| Tags | No tags attached. | ||||
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The current implementation is exactly according to the specification provided by the sponsor of the project. However as you point out the turbulent eddy impaction term should use the turbulent Weber number not the relative velocity Weber number which is appropriate for bubble breakup due to shearing off, according to Mamoru Ishii, Takashi Hibiki Thermo-Fluid Dynamics of Two-Phase Flow Second Edition I will refer this proposed change to the sponsor. |
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Resolved in OpenFOAM-dev by commit 3aea199ebebd440e0032ad40e61e6c968b248ba5 |
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Resolved by commit 3aea199ebebd440e0032ad40e61e6c968b248ba5 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2022-11-27 12:30 | nucerl | New Issue | |
| 2022-11-27 12:30 | nucerl | File Added: We#1.png | |
| 2022-11-27 12:30 | nucerl | File Added: We#2.png | |
| 2022-11-27 19:43 | henry | Note Added: 0012885 | |
| 2022-11-28 08:49 | henry | Note Added: 0012891 | |
| 2022-11-28 14:17 | henry | Assigned To | => henry |
| 2022-11-28 14:17 | henry | Status | new => resolved |
| 2022-11-28 14:17 | henry | Resolution | open => fixed |
| 2022-11-28 14:17 | henry | Fixed in Version | => dev |
| 2022-11-28 14:17 | henry | Note Added: 0012898 |
