- **OpenFOAM**
(*http://www.cfd-online.com/Forums/openfoam/*)

- - **How is the turbulence model called in openfoam?**
(*http://www.cfd-online.com/Forums/openfoam/109441-how-turbulence-model-called-openfoam.html*)

How is the turbulence model called in openfoam?Hi,
I am looking into how the RAS models are called (for example how k and epsilon equations are called to be solved in pisofoam). I had some questions about this. Take PISOFOAM as an example, I know that turbulence->correct(); is used to solve the k and epsilon equations and correct the turbulent viscosity. And then turbulence is defined in creatFields. H as follows:00039 autoPtr<incompressible::turbulenceModel> turbulence00040 (00041 incompressible::turbulenceModel::New(U, phi, laminarTransport)00042 );in the class turbulenceModel, the function correct appears as follows: 00127 void turbulenceModel::correct()00128 {00129 transportModel_.correct();00130 }In fact, in transportModel, there is no function defination for correction(). Thus I do not know how the main solver, PISOFOAM, continue to call the k and epsilon equations. I really appreciate it if anyone can give me some help with this problem. hz283 |

Hi hz283,
Foam::incompressible::turbulenceModel is an abstract class where the function correct() is virtual, so the child class, e.g. RASmodel, has to redefine it. RASmodel declares it also as a virtual method, so the next child, e.g. kEpsilon, has to redefine it as well. In the definition of correct() in kEpsilon finally the additional two equations for k and epsilon are solved. References: http://foam.sourceforge.net/docs/cpp/a02160.html http://foam.sourceforge.net/docs/cpp/a01654.html http://foam.sourceforge.net/docs/cpp/a00971.html explanation of virtual functions: http://www.cplusplus.com/doc/tutorial/polymorphism/ (see Virtual Members) Have fun, Jörn |

Hi Jorn,
Thank you so much for your help. hz283 |

All times are GMT -4. The time now is 07:10. |