From 9f40e04cc1b392aa45838cae10b3e3fc31a1cd60 Mon Sep 17 00:00:00 2001
From: Kutalmis Bercin <kutalmis.bercin@esi-group.com>
Date: Wed, 11 Oct 2023 11:23:08 +0100
Subject: [PATCH] BUG: ThermoSurfaceFilm: reintroduce energy to film sources
 (fixes #2996)

---
 .../ThermoSurfaceFilm/ThermoSurfaceFilm.C     | 49 ++++++++++++++++++-
 .../ThermoSurfaceFilm/ThermoSurfaceFilm.H     | 17 ++++++-
 2 files changed, 64 insertions(+), 2 deletions(-)

diff --git a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C
index 045cc208fb..9162d8a5d0 100644
--- a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C
+++ b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2017 OpenFOAM Foundation
-    Copyright (C) 2019-2021 OpenCFD Ltd.
+    Copyright (C) 2019-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -62,6 +62,53 @@ Foam::ThermoSurfaceFilm<CloudType>::ThermoSurfaceFilm
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
+template<class CloudType>
+template<class filmType>
+void Foam::ThermoSurfaceFilm<CloudType>::absorbInteraction
+(
+    filmType& film,
+    const parcelType& p,
+    const polyPatch& pp,
+    const label facei,
+    const scalar mass,
+    bool& keepParticle
+)
+{
+    DebugInfo<< "Parcel " << p.origId() << " absorbInteraction" << endl;
+
+    // Patch face normal
+    const vector& nf = pp.faceNormals()[facei];
+
+    // Patch velocity
+    const vector& Up = this->owner().U().boundaryField()[pp.index()][facei];
+
+    // Relative parcel velocity
+    const vector Urel(p.U() - Up);
+
+    // Parcel normal velocity
+    const vector Un(nf*(Urel & nf));
+
+    // Parcel tangential velocity
+    const vector Ut(Urel - Un);
+
+    film.addSources
+    (
+        pp.index(),
+        facei,
+        mass,                             // mass
+        mass*Ut,                          // tangential momentum
+        mass*mag(Un),                     // impingement pressure
+        mass*p.hs()                       // energy
+    );
+
+    this->nParcelsTransferred()++;
+
+    this->totalMassTransferred() += mass;
+
+    keepParticle = false;
+}
+
+
 template<class CloudType>
 bool Foam::ThermoSurfaceFilm<CloudType>::transferParcel
 (
diff --git a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H
index 51eaed0d87..da748ebd8c 100644
--- a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H
+++ b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2017 OpenFOAM Foundation
-    Copyright (C) 2021 OpenCFD Ltd.
+    Copyright (C) 2021-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -141,6 +141,21 @@ public:
 
     // Member Functions
 
+        // Interaction models
+
+            //- Absorb parcel into film
+            template<class filmType>
+            void absorbInteraction
+            (
+                filmType&,
+                const parcelType& p,
+                const polyPatch& pp,
+                const label facei,
+                const scalar mass,
+                bool& keepParticle
+            );
+
+
         // Evaluation
 
             //- Transfer parcel from cloud to surface film