基与OpenFOAM 13，我想单独在collidingParcel中添加一个壁面碰撞模型的话，进入下面的文件中。

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~/OpenFOAM/abcxxx-13/src/IVT13_src/lagrangian/parcel/parcels/derived/collidingParcel/makeCollidingParcelSubmodels.C

因为每个cloud在使用submodel的时候都需要有一个makeXXXmodels.H。
那么你单独为这个cloud生成一个makeXXXmodels.H 即可。
例如我的情况，我需要单独生成一个考虑rotation的壁面模型。
而momentumparcel中并没有考虑omega，而且我也不想在其中添加omega这个变量。
而在Collidingparcel中，直接就有omega，所以我想在collidingparcel中添加这个模型。
但是如果我修改原本的makeParcelPatchInteractionModels_rotation.H的话，那么所有引用此文件的cloud都有这个模型。但是并不是所有cloud都有omega这个变量。
因此，单独给collidingcloud 添加一个 “makeParcelPatchInteractionModels_rotation.H” 即可。

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2020 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "collidingCloud.H"

#include "makeParcelCloudFunctionObjects.H"

// Momentum
#include "makeParcelForces.H"
#include "makeParcelDispersionModels.H"
#include "makeParcelInjectionModels.H"
#include "makeParcelCollisionModels.H"
#include "makeParcelPatchInteractionModels_rotation.H"
#include "makeParcelStochasticCollisionModels.H"
#include "makeParcelSurfaceFilmModels.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

makeParcelCloudFunctionObjects(collidingCloud);

// Momentum sub-models
makeParcelForces(collidingCloud);
makeParcelDispersionModels(collidingCloud);
makeParcelInjectionModels(collidingCloud);
makeParcelCollisionModels(collidingCloud);
makeParcelPatchInteractionModels(collidingCloud);
makeParcelStochasticCollisionModels(collidingCloud);
makeParcelSurfaceFilmModels(collidingCloud);


// ************************************************************************* //
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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2020 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#ifndef makeParcelPatchInteractionModels_H
#define makeParcelPatchInteractionModels_H

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

// #include "LocalInteraction.H"
// #include "NoInteraction.H"
// #include "Rebound.H"
// #include "StandardWallInteraction.H"
#include "IVT13_StandardWallInteraction.H"
#include "IVT13_LocalInteraction.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#define makeParcelPatchInteractionModels(CloudType)                            \
                                                                               \
    makePatchInteractionModel(CloudType);                                      \
                                                                               \
    makePatchInteractionModelType(IVT13_StandardWallInteraction, CloudType);                \
    makePatchInteractionModelType(IVT13_LocalInteraction, CloudType);                \
                                                                               \

    // makePatchInteractionModelType(LocalInteraction, CloudType);                \
    // makePatchInteractionModelType(NoInteraction, CloudType);                   \
    // makePatchInteractionModelType(Rebound, CloudType);                         \
    // makePatchInteractionModelType(StandardWallInteraction, CloudType);


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif
// ************************************************************************* //