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IDProjectCategoryView StatusLast Update
0002496OpenFOAM[All Projects] Bugpublic2017-03-13 18:12
ReporterAMRBlackAssigned Tohenry 
PrioritynormalSeverityminorReproducibilityhave not tried
Status resolvedResolutionfixed 
PlatformGNU/LinuxOSUbuntuOS Version15.04
Product Version4.x 
Fixed in Version 
Summary0002496: Sign of coefficient for RDT-based compression term used in some k-epsilon based models may be reversed
DescriptionWhen check the RDT-based compression term used kEpsilon, RNGkEpsilon and LaunderSharmaKE model, I found that the sign of C3 may be reversed by accident. Please check it.

ref: EL TAHRY, S. (1983). k-epsilon equation for compressible reciprocating engine flows. Journal of Energy, 7(4), 345-353.
Tagsturbulence models

Activities

henry

2017-03-13 18:12

manager   ~0007923

Thanks for the bug-report. Yes an inconsistency has crept in between the definition/implementation of the "C3" dilatation term and the default value of the coefficient. This is now fixed in

OpenFOAM-dev: commit 76213ac30147e5d63d63354b41d9e4ffcdef2392

OpenFOAM-4.x: commit 7d5fe2f3d93f93b47428a31af71ee0256c4ec5da

turbulenceModels::RAS: Corrected sign of "C3" dilatation term
    
Set default value of C3 to 0
Set C3 to -0.33 in the engineFoam/kivaTest tutorial.

Issue History

Date Modified Username Field Change
2017-03-13 01:51 AMRBlack New Issue
2017-03-13 01:51 AMRBlack Tag Attached: turbulence models
2017-03-13 18:12 henry Assigned To => henry
2017-03-13 18:12 henry Status new => resolved
2017-03-13 18:12 henry Resolution open => fixed
2017-03-13 18:12 henry Note Added: 0007923