View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000507 | OpenFOAM | Bug | public | 2012-03-15 10:22 | 2012-04-13 21:46 |
| Reporter | vkrastev | Assigned To | |||
| Priority | normal | Severity | major | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | Linux | OS | Ubuntu | OS Version | 10.10 |
| Summary | 0000507: Sign inconsistency in the compressible Launder-Sharma k-epsilon model | ||||
| Description | Checking the epsilon transport equation in the Launder-Sharma low-Re model I've found a clear inconsistency in the C3 constant sign (at least it is there in the OF-2.1.0 release, I don't know if it has been already fixed in 2.1.x). The following is the (correct) compressibility production term in the standard k-epsilon model implementation: - fvm::SuSp(((2.0/3.0)*C1_ + C3_)*rho_*divU, epsilon_) As you can see, the term multiplied by C1 enters with a negative sign, while the term multiplied by C3 actually becomes positive, as in OF C3 is equal to -0.33 while the correct constant value in the RHS of the epsilon equation should be +0.33. This is the same (incorrect) term in the Launder-Sharma model: + fvm::SuSp((C3_ - 2.0/3.0*C1_)*rho_*divU, epsilon_) The C1 term is again negative, but so it is the C3 one as in OF +C3=-0.33. So, I don't know what is the real influence of such an error, but to me this is clearly a bug. Regards V. | ||||
| Tags | No tags attached. | ||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2012-03-15 10:22 | vkrastev | New Issue | |
| 2012-04-13 17:03 |
|
Status | new => resolved |
| 2012-04-13 17:03 |
|
Resolution | open => fixed |
| 2012-04-13 17:03 |
|
Assigned To | => user21 |
| 2012-04-13 17:06 |
|
Note Added: 0001238 | |
| 2012-04-13 17:06 |
|
Status | resolved => feedback |
| 2012-04-13 17:06 |
|
Resolution | fixed => reopened |
| 2012-04-13 17:07 |
|
Status | feedback => resolved |
| 2012-04-13 17:07 |
|
Resolution | reopened => fixed |
