ongoing: working on impedance bc for planar wg scatt

labmec · Aug 2, 2023 · 9a6ded1 · 9a6ded1
1 parent 00972c2
commit 9a6ded1
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/Material/Electromagnetics/TPZPlanarWgScatt.cpp b/Material/Electromagnetics/TPZPlanarWgScatt.cpp
@@ -87,6 +87,23 @@ void TPZPlanarWgScatt::ContributeBC(const TPZMaterialDataT<CSTATE> &data,
     case 1:
       ///PMC condition just adds zero to both matrices. nothing to do here....
       break;
+    case 2:{ ///impedance boundary condition
+      const STATE k0 = fScaleFactor * 2*M_PI/fLambda;
+      TPZFNMatrix<9,CSTATE> er,ur;
+      GetPermittivity(data.x,er);
+      GetPermeability(data.x,ur);
+      const CSTATE eta = sqrt(ur.GetVal(0,0)/er.GetVal(0,0));
+      const CSTATE coeff = 1i*(k0 / eta);
+      const int nshape=phi.Rows();
+      for(int i = 0 ; i<nshape ; i++){
+        for(int j=0;j<nshape;j++){
+          const CSTATE stiff = coeff * phi(i,0) * phi(j,0);
+          ek(i,j) += stiff*weight;
+        }
+      }
+      break;
+    }
+
     default:
       PZError<<__PRETTY_FUNCTION__;
       PZError<<"\nThis module supports only dirichlet and neumann boundary conditions.\n";