ENH: GAMGAgglomeration: updateInterval also for static mesh. Fixes #3387

src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.C

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2019-2024 OpenCFD Ltd.
+    Copyright (C) 2019-2025 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -243,7 +243,15 @@ Foam::GAMGAgglomeration::GAMGAgglomeration
     const dictionary& controlDict
 )
 :
-    MeshObject_type(mesh),
+    MeshObject_type
+    (
+        controlDict.getOrDefault<word>
+        (
+            "name",
+            GAMGAgglomeration::typeName
+        ),
+        mesh
+    ),
 
     maxLevels_(50),
 
@@ -308,10 +316,17 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
     const dictionary& controlDict
 )
 {
+
+
+
     const GAMGAgglomeration* agglomPtr =
         mesh.thisDb().cfindObject<GAMGAgglomeration>
         (
-            GAMGAgglomeration::typeName
+            controlDict.getOrDefault<word>
+            (
+                "name",
+                GAMGAgglomeration::typeName
+            )
         );
 
     if (agglomPtr)
@@ -373,12 +388,16 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
     const GAMGAgglomeration* agglomPtr =
         mesh.thisDb().cfindObject<GAMGAgglomeration>
         (
-            GAMGAgglomeration::typeName
+            controlDict.getOrDefault<word>
+            (
+                "name",
+                GAMGAgglomeration::typeName
+            )
         );
 
     if (agglomPtr)
     {
-        if (agglomPtr->requireUpdate_)
+        if (agglomPtr->requireUpdate_ || agglomPtr->requiresUpdate())
         {
             mesh.thisDb().checkOut(const_cast<GAMGAgglomeration*>(agglomPtr));
             return GAMGAgglomeration::New(matrix, controlDict);
@@ -431,12 +450,16 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
     const GAMGAgglomeration* agglomPtr =
         mesh.thisDb().cfindObject<GAMGAgglomeration>
         (
-            GAMGAgglomeration::typeName
+            controlDict.getOrDefault<word>
+            (
+                "name",
+                GAMGAgglomeration::typeName
+            )
         );
 
     if (agglomPtr)
     {
-        if (agglomPtr->requireUpdate_)
+        if (agglomPtr->requireUpdate_ || agglomPtr->requiresUpdate())
         {
             mesh.thisDb().checkOut(const_cast<GAMGAgglomeration*>(agglomPtr));
             return GAMGAgglomeration::New(mesh, controlDict);

src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.H

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2019-2023 OpenCFD Ltd.
+    Copyright (C) 2019-2025 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -38,8 +38,12 @@ Description
 
         // Whether to cache the agglomeration
         cacheAgglomeration  yes;
-        // Optionally update every updateInterval mesh motion. Default is 1.
+        // Optionally update every updateInterval time steps. Default is 1.
+        // - only applies if cacheAgglomeration
+        // - applies also for static mesh cases
         updateInterval      10;
+        // Optional name (default is GAMGAgglomeration)
+        //name            pAgglomeration;
 
         // Optionally agglomerate coarsest-level across processors
         processorAgglomerator   masterCoarsest;
@@ -188,7 +192,7 @@ protected:
     // Protected Member Functions
 
         //- Does the agglomeration need to be fully updated?
-        bool requiresUpdate() const;
+        virtual bool requiresUpdate() const;
 
         //- Assemble coarse mesh addressing
         void agglomerateLduAddressing(const label fineLevelIndex);