From 14b68a7f059647ed88aae8b6ad7d838b6734bc13 Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Mon, 18 Aug 2025 13:36:50 +0100
Subject: [PATCH] ENH: createPatch: late adding patchfields. Fixes #3410

Thanks to Alexey Matveichev
---
 .../manipulation/createPatch/createPatch.C    | 28 +++++++++++++------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/applications/utilities/mesh/manipulation/createPatch/createPatch.C b/applications/utilities/mesh/manipulation/createPatch/createPatch.C
index b255fcf58f..cdad1c1fc8 100644
--- a/applications/utilities/mesh/manipulation/createPatch/createPatch.C
+++ b/applications/utilities/mesh/manipulation/createPatch/createPatch.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2017 OpenFOAM Foundation
-    Copyright (C) 2016-2024 OpenCFD Ltd.
+    Copyright (C) 2016-2025 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -1476,14 +1476,11 @@ int main(int argc, char *argv[])
     {
         ++runTime;
     }
-    else
-    {
-        forAll(meshes, meshi)
-        {
-            fvMesh& mesh = meshes[meshi];
 
-            mesh.setInstance(oldInstances[meshi]);
-        }
+    forAll(meshes, meshi)
+    {
+        fvMesh& mesh = meshes[meshi];
+        mesh.setInstance(overwrite ? oldInstances[meshi] : runTime.timeName());
     }
 
     // More precision (for points data)
@@ -1493,6 +1490,21 @@ int main(int argc, char *argv[])
     forAll(meshes, meshi)
     {
         fvMesh& mesh = meshes[meshi];
+
+        // Override bcs with explicitly provided info. Done late so there
+        // are already patch faces
+        forAll(patchInfoDicts[meshi], sourcei)
+        {
+            const dictionary& patchDict = patchInfoDicts[meshi][sourcei];
+            const word& patchName = patchNames[meshi][sourcei];
+            const label patchID = mesh.boundary().findPatchID(patchName);
+            if (patchID != -1 && patchDict.found("patchFields"))
+            {
+                const dictionary& pfd = patchDict.subDict("patchFields");
+                fvMeshTools::setPatchFields(mesh, patchID, pfd);
+            }
+        }
+
         Info<< "\n\nWriting repatched mesh " << mesh.name()
             << " to " << runTime.timeName() << nl << endl;
         mesh.clearOut();    // remove meshPhi