From 0a421c99abf15c91b539a0b55ad5b0ba1f56b948 Mon Sep 17 00:00:00 2001
From: Andrew Heather <>
Date: Thu, 24 Jul 2025 14:51:45 +0100
Subject: [PATCH] ENH: checkMesh -writeChecks : support multi-region - see
 EP10:599

---
 .../manipulation/checkMesh/writeMeshChecks.H  | 24 ++++++++++---------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/applications/utilities/mesh/manipulation/checkMesh/writeMeshChecks.H b/applications/utilities/mesh/manipulation/checkMesh/writeMeshChecks.H
index f4c8051fc6..e3d80bb154 100644
--- a/applications/utilities/mesh/manipulation/checkMesh/writeMeshChecks.H
+++ b/applications/utilities/mesh/manipulation/checkMesh/writeMeshChecks.H
@@ -13,28 +13,34 @@ const Enum<writeChecksFormatType> writeChecksFormatTypeNames
 
 writeChecksFormatType writeChecksFormat(writeChecksFormatType::none);
 
-auto writeMeshChecks = [](const fvMesh& mesh, const writeChecksFormatType fmt)
+auto writeMeshChecks = [&](const fvMesh& mesh, const writeChecksFormatType fmt)
 {
     if (UPstream::master())
     {
+        fileName path(mesh.time().globalPath()/"checkMesh");
+        if (mesh.name() != polyMesh::defaultRegion)
+        {
+            path += "_" + mesh.name();
+        }
+
+        OFstream os(path.ext(writeChecksFormatTypeNames[fmt]));
+
+        Info<< "Writing mesh data to " << os.name() << nl << endl;
+
         switch (fmt)
         {
             case writeChecksFormatType::dictionary:
             {
-                OFstream os(mesh.time().globalPath()/"checkMesh.dict");
-
                 IOdictionary data
                 (
                     IOobject
                     (
-                        mesh.time().globalPath()/"checkMesh.dict",
+                        os.name(),
                         mesh,
                         IOobject::NO_READ
                     )
                 );
 
-                Info<< "Writing mesh data to " << os.name() << nl << endl;
-
                 data.writeHeader(os);
 
                 mesh.data().meshDict().write(os, false);
@@ -45,13 +51,9 @@ auto writeMeshChecks = [](const fvMesh& mesh, const writeChecksFormatType fmt)
             }
             case writeChecksFormatType::JSON:
             {
-                OFstream os(mesh.time().globalPath()/"checkMesh.json");
-
-                Info<< "Writing mesh data to " << os.name() << nl << endl;
-
                 JSONformatter json(os);
-
                 json.writeDict(mesh.data().meshDict());
+
                 break;
             }
             default: