Add switch to deactivate checking of LSMatrix

Author: JanGaertner

README.md

@@ -116,6 +116,9 @@ FoamFile
                           // inverse can have. Only change if you know what you
                           // are doing!
 
+    checkCondition  false;// Check the condition of the pseudo inverse matrix
+                          // If the central stencil has at least one zero entry
+                          // the matrix is removed for all stencils of this cell.
 // ************************************************************************* /
 ```
 

libWENOEXT/WENOBase/WENOBase.C

@@ -548,10 +548,16 @@ Foam::scalarRectangularMatrix Foam::WENOBase::calcMatrix
 
     scalarRectangularMatrix AInv  = svdCurrPtr->VSinvUt();
 
-    if (stencilI == 0 && svdCurrPtr->nZeros() != 0)
+    if (checkCondition_ && stencilI == 0 && svdCurrPtr->nZeros() != 0)
     {
         deleteStencil(localCellI,stencilI);
         stencilsID_[localCellI][stencilI][0] = int(Cell::empty);
+        return scalarRectangularMatrix
+        (
+            nDvt_,
+            nCells,
+            scalar(0.0)
+        );
     }
 
     if (AInv.n() != stencilSize-1)
@@ -697,6 +703,8 @@ Foam::WENOBase::WENOBase
 
         maxCondition_ = WENODict.lookupOrAddDefault<scalar>("maxCondition",1e-05);
 
+        checkCondition_ = WENODict.lookupOrAddDefault<Switch>("checkCondition",true);
+        
         // ------------- Initialize Lists --------------------------------------
 
         stencilsID_.setSize(localMesh.nCells());
@@ -773,7 +781,8 @@ Foam::WENOBase::WENOBase
 
         }
 
-        LSMatrixCheck();
+        if (checkCondition_)
+            LSMatrixCheck();
 
 
         Info << "\t5) Calcualte smoothness indicator B..."<<endl;

libWENOEXT/WENOBase/WENOBase.H

@@ -168,6 +168,11 @@ class WENOBase
         //- Lists of oscillation matrices for each stencil of each cell
         List<geometryWENO::DynamicMatrix> B_;
 
+        //- Switch to check the condition of the first stencil of the 
+        //  pseudo inverse matrices. 
+        //  If true it removes the matrix if the central stencil has at least
+        //  one zero entry. (Default is true)
+        Switch checkCondition_;
 
     //- Private member functions