How is the turbulence model called in openfoam?
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> turbulence
00041 incompressible::turbulenceModel::New(U, phi, laminarTransport)
in the class turbulenceModel, the function correct appears as follows:
00127 void turbulenceModel::correct()
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.
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.
explanation of virtual functions:
(see Virtual Members)
Thank you so much for your help.
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