[PL] RichardsComponentTransport: Save element id.

ProcessLib/RichardsComponentTransport/RichardsComponentTransportFEM.h

@@ -103,7 +103,7 @@ public:
         bool is_axially_symmetric,
         unsigned const integration_order,
         RichardsComponentTransportProcessData const& process_data)
-        : _element(element),
+        : _element_id(element.getID()),
           _process_data(process_data),
           _integration_method(integration_order)
     {
@@ -155,7 +155,7 @@ public:
             _integration_method.getNumberOfPoints();
 
         SpatialPosition pos;
-        pos.setElementID(_element.getID());
+        pos.setElementID(_element_id);
 
         auto const num_nodes = ShapeFunction::NPOINTS;
         auto p_nodal_values =
@@ -307,7 +307,7 @@ public:
         unsigned const n_integration_points =
             _integration_method.getNumberOfPoints();
 
-        auto const indices = NumLib::getIndices(_element.getID(), dof_table);
+        auto const indices = NumLib::getIndices(_element_id, dof_table);
         assert(!indices.empty());
         auto const local_x = current_solution.get(indices);
 
@@ -317,7 +317,7 @@ public:
             cache, GlobalDim, n_integration_points);
 
         SpatialPosition pos;
-        pos.setElementID(_element.getID());
+        pos.setElementID(_element_id);
 
         MaterialLib::Fluid::FluidProperty::ArrayType vars;
 
@@ -390,12 +390,12 @@ public:
         std::vector<double>& cache) const override
     {
         SpatialPosition pos;
-        pos.setElementID(_element.getID());
+        pos.setElementID(_element_id);
 
         unsigned const n_integration_points =
             _integration_method.getNumberOfPoints();
 
-        auto const indices = NumLib::getIndices(_element.getID(), dof_table);
+        auto const indices = NumLib::getIndices(_element_id, dof_table);
         assert(!indices.empty());
         auto const local_x = current_solution.get(indices);
 
@@ -427,7 +427,7 @@ public:
     }
 
 private:
-    MeshLib::Element const& _element;
+    unsigned const _element_id;
     RichardsComponentTransportProcessData const& _process_data;
 
     IntegrationMethod const _integration_method;