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- - **Definition of a linear function as volScalarField**
(*https://www.cfd-online.com/Forums/openfoam-solving/62788-definition-linear-function-volscalarfield.html*)

Definition of a linear function as volScalarFieldHi Foamers,
I am trying to model non-newtonian flow and in the model I am being using I have a linear function that depends on the trace of stress tensor field, in the form func_lin=1+K*trace(StressS) I am using the PISO algorithm to solve the equations, and I believe to calculate that linear function I need to define a volScalarField, and mapped it in the mesh. I am using the following code to do this volScalarField func_lin ( IOobject ( "func_lin", runTime.timeName(), mesh, IOobject::NO_READ, IOobject::NO_WRITE ), 1.0 + K*tr(stressS) ); K is a scalar constant. Am I right? I think this code initializes the scalar field, that is then recalculated in each iteration. However, when I compare my predictions with analytical results, I do not get good results. I may be due to the definition of the linear function. Can someone help me out? Thanks, Titio |

openfoam solvers combinationHi,
I am trying to combine two solvers of openfoam (nonNewtonianIcoFoam anddieselFoam). I need an algorithm to do it. Roosta |

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