View source for Extend-bazaar/Toolkits/nutSAWallFunction

== Description ==
This code implements Wall function boundary condition for nut which was formulated from analytic solution of SA model.
This wall function works with any RANS turbulence model since it depends only on U and nu.

Reference: 
    @verbatim
        "Modifications and Clarifications for the Implementation
         of the Spalart-Allmaras Turbulence Model"
        S.R. Allmaras,
        F.T. Johnson,
        P.R. Spalart
        Seventh International Conference on Computational Fluid Dynamics 
        (ICCFD7), 2012, pp. 1-11.
    @endverbatim

== Installation ==

{{versionInfo}}{{version3.2-ext}}

* Download from https://github.com/HobbyFoamer/nutSAWallFunction

* Move files by
<bash>
mkdir $FOAM_SRC/turbulenceModels/incompressible/RAS/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutSAWallFunction
mv nutSAWallFunctionFvPatchScalarField.H nutSAWallFunctionFvPatchScalarField.C $FOAM_SRC/turbulenceModels/incompressible/RAS/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutSAWallFunction
</bash>

* Modify $FOAM_SRC/turbulenceModels/incompressible/RAS/Make/files by adding a line for the wall function in nutWallFunctions section. For example:
<bash>
nutWallFunctions = $(wallFunctions)/nutWallFunctions
$(nutWallFunctions)/nutkWallFunction/nutkWallFunctionFvPatchScalarField.C
$(nutWallFunctions)/nutWallFunction/nutWallFunctionFvPatchScalarField.C
$(nutWallFunctions)/nutRoughWallFunction/nutRoughWallFunctionFvPatchScalarField.C
$(nutWallFunctions)/nutSpalartAllmarasWallFunction/nutSpalartAllmarasWallFunctionFvPatchScalarField.C
$(nutWallFunctions)/nutSpalartAllmarasStandardWallFunction/nutSpalartAllmarasStandardWallFunctionFvPatchScalarField.C
$(nutWallFunctions)/nutSpalartAllmarasStandardRoughWallFunction/nutSpalartAllmarasStandardRoughWallFunctionFvPatchScalarField.C
$(nutWallFunctions)/nutLowReWallFunction/nutLowReWallFunctionFvPatchScalarField.C
$(nutWallFunctions)/nutSAWallFunction/nutSAWallFunctionFvPatchScalarField.C <- new line
</bash>

* Compile
<bash>
cd $FOAM_SRC/..
./Allwmake.firstInstall
</bash>

== Usage examples ==
To use this code, insert into nut:

<cpp>
    nut
    {
        type            nutSAWallFunction;
        value           uniform 0;
    }
</cpp>

== Documentation ==
This implementation is based on publication by [https://www.researchgate.net/publication/302963995_Modifications_and_clarifications_for_the_implementation_of_the_Spalart-Allmaras_turbulence_model Allmaras et al (2012)].

== History ==
31 Jan 2019: First upload