Changeset 16803 for issm/trunk-jpl/src/c/analyses/StressbalanceVerticalAnalysis.cpp

Timestamp:

11/16/13 13:36:32 (11 years ago)

Author:

Mathieu Morlighem

Message:

NEW: done with SSA 3d

File:

• issm/trunk-jpl/src/c/analyses/StressbalanceVerticalAnalysis.cpp (modified) (1 diff)

issm/trunk-jpl/src/c/analyses/StressbalanceVerticalAnalysis.cpp

@@ -100 +100 @@
 }/*}}}*/
 ElementVector* StressbalanceVerticalAnalysis::CreatePVector(Element* element){/*{{{*/
-_error_("not implemented yet");
+
+        /*compute all load vectors for this element*/
+        ElementVector* pe1=CreatePVectorVolume(element);
+        ElementVector* pe2=CreatePVectorBase(element);
+        ElementVector* pe =new ElementVector(pe1,pe2);
+
+        /*clean-up and return*/
+        delete pe1;
+        delete pe2;
+        return pe;
+}/*}}}*/
+ElementVector* StressbalanceVerticalAnalysis::CreatePVectorVolume(Element* element){/*{{{*/
+
+        /*Intermediaries*/
+        int         approximation;
+        IssmDouble  Jdet;
+        IssmDouble  dudx,dvdy,dwdz;
+        IssmDouble  du[3],dv[3],dw[3];
+        IssmDouble* xyz_list = NULL;
+
+        /*Fetch number of nodes for this finite element*/
+        int numnodes = element->GetNumberOfNodes();
+
+        /*Initialize Element vector and basis functions*/
+        ElementVector* pe    = element->NewElementVector();
+        IssmDouble*    basis = xNew<IssmDouble>(numnodes);
+
+        /*Retrieve all inputs and parameters*/
+        element->GetVerticesCoordinates(&xyz_list);
+        element->GetInputValue(&approximation,ApproximationEnum);
+        Input* vx_input=element->GetInput(VxEnum); _assert_(vx_input);
+        Input* vy_input=element->GetInput(VyEnum); _assert_(vy_input);
+        Input* vzFS_input=NULL;
+        if(approximation==HOFSApproximationEnum || approximation==SSAFSApproximationEnum){
+                vzFS_input=element->GetInput(VzFSEnum); _assert_(vzFS_input);
+        }
+
+        /* Start  looping on the number of gaussian points: */
+        Gauss* gauss=element->NewGauss(2);
+        for(int ig=gauss->begin();ig<gauss->end();ig++){
+                gauss->GaussPoint(ig);
+
+                element->JacobianDeterminant(&Jdet,xyz_list,gauss);
+                element->NodalFunctions(basis,gauss);
+
+                vx_input->GetInputDerivativeValue(&du[0],xyz_list,gauss);
+                vy_input->GetInputDerivativeValue(&dv[0],xyz_list,gauss);
+                if(approximation==HOFSApproximationEnum || approximation==SSAFSApproximationEnum){
+                        vzFS_input->GetInputDerivativeValue(&dw[0],xyz_list,gauss);
+                        dwdz=dw[2];
+                }
+                else dwdz=0;
+                dudx=du[0];
+                dvdy=dv[1];
+
+                for(int i=0;i<numnodes;i++) pe->values[i] += (dudx+dvdy+dwdz)*Jdet*gauss->weight*basis[i];
+        }
+
+        /*Clean up and return*/
+        delete gauss;
+        xDelete<IssmDouble>(basis);
+        xDelete<IssmDouble>(xyz_list);
+        return pe;
+}/*}}}*/
+ElementVector* StressbalanceVerticalAnalysis::CreatePVectorBase(Element* element){/*{{{*/
+
+        /*Intermediaries */
+        int         i,j,approximation;
+        IssmDouble *xyz_list      = NULL;
+        IssmDouble *xyz_list_base = NULL;
+        IssmDouble  Jdet;
+        IssmDouble  vx,vy,vz,dbdx,dbdy,basalmeltingvalue;
+        IssmDouble  slope[3];
+
+        if(!element->IsOnBed()) return NULL;
+
+        /*Fetch number of nodes for this finite element*/
+        int numnodes = element->GetNumberOfNodes();
+
+        /*Initialize Element vector*/
+        ElementVector* pe    = element->NewElementVector();
+        IssmDouble*    basis = xNew<IssmDouble>(numnodes);
+
+        /*Retrieve all inputs and parameters*/
+        element->GetVerticesCoordinates(&xyz_list);
+        element->GetVerticesCoordinatesBase(&xyz_list_base);
+        element->GetInputValue(&approximation,ApproximationEnum);
+        Input* bed_input=element->GetInput(BedEnum);                                _assert_(bed_input);
+        Input* basal_melting_input=element->GetInput(BasalforcingsMeltingRateEnum); _assert_(basal_melting_input);
+        Input* vx_input=element->GetInput(VxEnum);                                  _assert_(vx_input);
+        Input* vy_input=element->GetInput(VyEnum);                                  _assert_(vy_input);
+        Input* vzFS_input=NULL;
+        if(approximation==HOFSApproximationEnum || approximation==SSAFSApproximationEnum){
+                vzFS_input=element->GetInput(VzFSEnum);       _assert_(vzFS_input);
+        }
+
+        /* Start  looping on the number of gaussian points: */
+        Gauss* gauss=element->NewGaussBase(2);
+        for(int ig=gauss->begin();ig<gauss->end();ig++){
+                gauss->GaussPoint(ig);
+
+                basal_melting_input->GetInputValue(&basalmeltingvalue,gauss);
+                bed_input->GetInputDerivativeValue(&slope[0],xyz_list,gauss);
+                vx_input->GetInputValue(&vx,gauss);
+                vy_input->GetInputValue(&vy,gauss);
+                if(approximation==HOFSApproximationEnum || approximation==SSAFSApproximationEnum){
+                        vzFS_input->GetInputValue(&vz,gauss);
+                }
+                else vz=0.;
+
+                dbdx=slope[0];
+                dbdy=slope[1];
+
+                element->JacobianDeterminantBase(&Jdet,xyz_list_base,gauss);
+                element->NodalFunctions(basis,gauss);
+
+                for(i=0;i<numnodes;i++) pe->values[i]+=-Jdet*gauss->weight*(vx*dbdx+vy*dbdy-vz-basalmeltingvalue)*basis[i];
+        }
+
+        /*Clean up and return*/
+        delete gauss;
+        xDelete<IssmDouble>(basis);
+        xDelete<IssmDouble>(xyz_list);
+        xDelete<IssmDouble>(xyz_list_base);
+        return pe;
+
 }/*}}}*/
 void StressbalanceVerticalAnalysis::GetSolutionFromInputs(Vector<IssmDouble>* solution,Element* element){/*{{{*/