patchWave.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2024 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
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#include "patchWave.H"
#include "polyMesh.H"
#include "wallPoint.H"
#include "globalMeshData.H"
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::patchWave::setChangedFaces
(
    const labelHashSet& patchIDs,
    DynamicList<label>& changedFaces,
    DynamicList<wallPoint>& faceDist
) const
{
    const polyMesh& mesh = cellDistFuncs::mesh();
 
    forAll(mesh.boundaryMesh(), patchi)
    {
        if (patchIDs.found(patchi))
        {
            const polyPatch& patch = mesh.boundaryMesh()[patchi];
 
            const auto areaFraction(patch.areaFraction());
 
            const auto faceCentres(patch.faceCentres());
 
            forAll(faceCentres, patchFacei)
            {
                if
                (
                    !areaFraction
                 || (areaFraction()[patchFacei] > 0.5)    // mostly wall
                )
                {
                    changedFaces.append(patch.start() + patchFacei);
                    faceDist.append(wallPoint(faceCentres[patchFacei], 0.0));
                }
            }
        }
    }
 
    for (const label facei : sourceIDs_)
    {
        changedFaces.append(facei);
 
        faceDist.append
        (
            wallPoint
            (
                mesh.faceCentres()[facei],
                0.0
            )
        );
    }
}
 
 
Foam::label Foam::patchWave::getValues(const MeshWave<wallPoint>& waveInfo)
{
    const List<wallPoint>& cellInfo = waveInfo.allCellInfo();
    const List<wallPoint>& faceInfo = waveInfo.allFaceInfo();
 
    label nIllegal = 0;
 
    // Copy cell values
    distance_.setSize(cellInfo.size());
 
    forAll(cellInfo, celli)
    {
        scalar dist = cellInfo[celli].distSqr();
 
        if (cellInfo[celli].valid(waveInfo.data()))
        {
            distance_[celli] = Foam::sqrt(dist);
        }
        else
        {
            distance_[celli] = dist;
 
            nIllegal++;
        }
    }
 
    // Copy boundary values
    forAll(patchDistance_, patchi)
    {
        const polyPatch& patch = mesh().boundaryMesh()[patchi];
 
        // Allocate storage for patchDistance
        scalarField* patchDistPtr = new scalarField(patch.size());
 
        patchDistance_.set(patchi, patchDistPtr);
 
        scalarField& patchField = *patchDistPtr;
 
        forAll(patchField, patchFacei)
        {
            label meshFacei = patch.start() + patchFacei;
 
            scalar dist = faceInfo[meshFacei].distSqr();
 
            if (faceInfo[meshFacei].valid(waveInfo.data()))
            {
                // Adding SMALL to avoid problems with /0 in the turbulence
                // models
                patchField[patchFacei] = Foam::sqrt(dist) + SMALL;
            }
            else
            {
                patchField[patchFacei] = dist;
 
                nIllegal++;
            }
        }
    }
    return nIllegal;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::patchWave::patchWave
(
    const polyMesh& mesh,
    const labelHashSet& patchIDs,
    const bool correctWalls,
    const labelList& sourceIDs
)
:
    cellDistFuncs(mesh),
    patchIDs_(patchIDs),
    correctWalls_(correctWalls),
    nUnset_(0),
    distance_(mesh.nCells()),
    patchDistance_(mesh.boundaryMesh().size()),
    sourceIDs_(sourceIDs)
{
    patchWave::correct();
}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::patchWave::~patchWave()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::patchWave::correct()
{
    // Set initial changed faces: set wallPoint for wall faces to wall centre
 
    label nPatch = sumPatchSize(patchIDs_) + sourceIDs_.size();
 
    DynamicList<wallPoint> faceDist(nPatch);
    DynamicList<label> changedFaces(nPatch);
 
    // Set to faceDist information to facecentre on walls.
    setChangedFaces(patchIDs_, changedFaces, faceDist);
 
    // Do calculate wall distance by 'growing' from faces.
    MeshWave<wallPoint> waveInfo
    (
        mesh(),
        changedFaces,
        faceDist,
        mesh().globalData().nTotalCells()+1 // max iterations
    );
 
    // Copy distance into return field
    nUnset_ = getValues(waveInfo);
 
    // Correct wall cells for true distance
    if (correctWalls_)
    {
        Map<label> nearestFace(2*nPatch);
 
        if (cellDistFuncs::useCombinedWallPatch)
        {
            // Correct across multiple patches
            correctBoundaryCells
            (
                patchIDs_.sortedToc(),
                true,           // do point-connected cells as well
                distance_,
                nearestFace
            );
        }
        else
        {
            // Backwards compatible
            correctBoundaryFaceCells
            (
                patchIDs_,
                distance_,
                nearestFace
            );
 
            correctBoundaryPointCells
            (
                patchIDs_,
                distance_,
                nearestFace
            );
        }
    }
}
 
 
// ************************************************************************* //