ENH: multiLevel decomposition method.

applications/utilities/parallelProcessing/decomposePar/decomposeParDict

@@ -19,6 +19,7 @@ FoamFile
 
 numberOfSubdomains  4;
 
+
 //- Keep owner and neighbour on same processor for faces in zones:
 // preserveFaceZones (heater solid1 solid3);
 
@@ -28,15 +29,40 @@ numberOfSubdomains  4;
 //preservePatches (cyclic_half0 cyclic_half1);
 
 
-method          scotch;
+// method          scotch;
 // method          hierarchical;
 // method          simple;
 // method          metis;
 // method          manual;
+method          multiLevel;
+
+multiLevelCoeffs
+{
+    level0
+    {
+        numberOfSubdomains  2;
+        method simple;
+        simpleCoeffs
+        {
+            n           (2 1 1);
+            delta       0.001;
+        }
+    }
+    level1
+    {
+        numberOfSubdomains  2;
+        method scotch;
+    }
+}
+
+
+// Desired output
+
+
 
 simpleCoeffs
 {
-    n           (2 2 1);
+    n           (2 1 1);
     delta       0.001;
 }
 

applications/utilities/parallelProcessing/decomposePar/domainDecompositionDistribute.C

@@ -109,13 +109,12 @@ void Foam::domainDecomposition::distributeCells()
 
     autoPtr<decompositionMethod> decomposePtr = decompositionMethod::New
     (
-        decompositionDict_,
-        *this
+        decompositionDict_
     );
 
     if (sameProcFaces.empty())
     {
-        cellToProc_ = decomposePtr().decompose(cellCentres());
+        cellToProc_ = decomposePtr().decompose(*this, cellCentres());
     }
     else
     {
@@ -174,7 +173,12 @@ void Foam::domainDecomposition::distributeCells()
 
         // Do decomposition on agglomeration
         // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-        cellToProc_ = decomposePtr().decompose(globalRegion, regionCentres);
+        cellToProc_ = decomposePtr().decompose
+        (
+            *this,
+            globalRegion,
+            regionCentres
+        );
     }
 
     Info<< "\nFinished decomposition in "