Corrected surface-normal gradient scheme

Table of Contents

• Properties
• Usage
• Further information

\[ \snGrad Q = \underbrace{\alpha \frac{Q_P - Q_N}{| \vec{d} |}}_{\mathrm{implicit}} + \underbrace{\left( \hat{\vec{n}} - \alpha \hat{\vec{d}} \right) \dprod \left( \grad Q \right)_f}_{\mathrm{explicit\ correction}} \]

where

\[ \alpha = \frac{1}{cos(\theta)} \]

Properties

• Central-difference snGrad scheme with non-orthogonal correction
• delta coefficients given by: nonOrthDeltaCoeffs
• explicit non-orthogonal correction

Usage

The scheme is specified using:

snGradSchemes
{
    default         none;
    grad(U)         corrected;
}

Further information

Source code

• Foam::fv::correctedSnGrad

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