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Definition of a linear function as volScalarField

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Old   March 19, 2009, 14:22
Question Definition of a linear function as volScalarField
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Antonio Martins
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Hi 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


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
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,

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Old   October 3, 2010, 16:51
Default openfoam solvers combination
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saeed roosta
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I am trying to combine two solvers of openfoam (nonNewtonianIcoFoam anddieselFoam). I need an algorithm to do it.
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