uniformMultiMaterialInterface

Description

This class applies a uniform multi-material correction to the solution of the momentum balance equation in mechanicsSubSolver.

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Options

The parameters for this class are to be set in the multiMaterialCorrection sub-dictionary within the mechanicsOptions subdictionary, which in turn is located within the solverDict.

Parameters in multiMaterialCorrection:

defaultWeights	Parameter of the multiMaterialCorrection subdictionary; defines the fraction of the full correction applied, between 1 and 0. Applying full correction in all directions for every cell may negatively impact convergence. We recommend setting defaultWeights between 0.9 and 1 for a good balance (1 if possible).
defaultWeightsGrad	Defines the fraction of the full correction applied to the gradient contribution in sigmaExp, ranging from 0 to 1. By default it is set equal to defaultWeights. Applying full correction in all directions for every cell may negatively impact convergence. We recommend setting defaultWeights between 0.9 and 1 for a good balance (1 if possible).

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Usage

Here is a code snippet of the solverDict to be used for activating the uniform multi-material correction:

// It is just an example, you can select any mechanicsSolver
mechanicsSolver smallStrain;

// Rest of the solverDict etc...

mechanicsOptions
{
    // Other options if needed

    // This is not necessary, as activating the multiMaterial correction
    // will make RhieChowCorrection false by default
    RhieChowCorrection false;    

    // The presence of this subdictionary activates the multiMaterial 
    // correction
    multiMaterialCorrection
    {
        type uniform;

        defaultWeights 1.0;

        // Not needed in all cases, by default equal 
        // to defaultWeights
        defaultWeightsGrad 1.0;
    }
}

// Rest of the solverDict etc...