OpDomainResidualVector Struct Reference

Integrate the domain residual vector (RHS) More...

Inheritance diagram for OpDomainResidualVector:

Collaboration diagram for OpDomainResidualVector:

Public Member Functions
	OpDomainResidualVector (std::string field_name, boost::shared_ptr< MatrixDouble > field_grad_mat)
MoFEMErrorCode	iNtegrate (EntData &data)
	Class dedicated to integrate operator. More...
Public Member Functions inherited from MoFEM::OpBaseImpl< A, EleOp >
	OpBaseImpl (const std::string row_field_name, const std::string col_field_name, const OpType type, boost::shared_ptr< Range > ents_ptr=nullptr)
MoFEMErrorCode	doWork (int row_side, int col_side, EntityType row_type, EntityType col_type, EntData &row_data, EntData &col_data)
	Do calculations for the left hand side. More...
MoFEMErrorCode	doWork (int row_side, EntityType row_type, EntData &row_data)
	Do calculations for the right hand side. More...
void	setAssembleTo (AssembleTo a_to)
	Where to assemble. More...

Private Attributes
boost::shared_ptr< MatrixDouble >	fieldGradMat

Additional Inherited Members
Public Types inherited from MoFEM::OpBaseImpl< A, EleOp >
enum	AssembleTo { AMat , BMat }
using	OpType = typename EleOp::OpType
using	EntData = EntitiesFieldData::EntData
Public Attributes inherited from MoFEM::OpBaseImpl< A, EleOp >
TimeFun	timeScalingFun
	assumes that time variable is set More...
FEFun	feScalingFun
	assumes that time variable is set More...
boost::shared_ptr< Range >	entsPtr
	Entities on which element is run. More...
Protected Member Functions inherited from MoFEM::OpBaseImpl< A, EleOp >
auto	matSelector ()
	Select matrix. More...
template<int DIM>
FTensor::Tensor1< FTensor::PackPtr< double *, DIM >, DIM >	getNf ()
template<int DIM>
FTensor::Tensor2< FTensor::PackPtr< double *, DIM >, DIM, DIM >	getLocMat (const int rr)
virtual MoFEMErrorCode	iNtegrate (EntData &row_data, EntData &col_data)
	Integrate grad-grad operator. More...
virtual MoFEMErrorCode	aSsemble (EntData &row_data, EntData &col_data, const bool trans)
virtual MoFEMErrorCode	iNtegrate (EntData &data)
	Class dedicated to integrate operator. More...
virtual MoFEMErrorCode	aSsemble (EntData &data)
Protected Attributes inherited from MoFEM::OpBaseImpl< A, EleOp >
enum AssembleTo	assembleTo = BMat
int	nbRows
	number of dofs on rows More...
int	nbCols
	number if dof on column More...
int	nbIntegrationPts
	number of integration points More...
int	nbRowBaseFunctions
	number or row base functions More...
int	rowSide
	row side number More...
int	colSide
	column side number More...
EntityType	rowType
	row type More...
EntityType	colType
	column type More...
bool	assembleTranspose
bool	onlyTranspose
MatrixDouble	locMat
	local entity block matrix More...
MatrixDouble	locMatTranspose
	local entity block matrix More...
VectorDouble	locF
	local entity vector More...

Detailed Description

Integrate the domain residual vector (RHS)

\[ \sum\limits_j {\left[ {\int\limits_{{\Omega _e}} {\left( {{a_n}\nabla {\phi _i} \cdot \nabla {\phi _j} - a_n^3\nabla {\phi _i}\left( {\nabla u \cdot \nabla {\phi _j}} \right)\nabla u} \right)d{\Omega _e}} } \right]\delta {U_j}} = \int\limits_{{\Omega _e}} {{\phi _i}fd{\Omega _e}} - \int\limits_{{\Omega _e}} {\nabla {\phi _i}{a_n}\nabla ud{\Omega _e}} \\ {a_n} = \frac{1}{{{{\left( {1 + {{\left| {\nabla u} \right|}^2}} \right)}^{\frac{1}{2}}}}} \]

Definition at line 118 of file minimal_surface_equation.cpp.

Constructor & Destructor Documentation

OpDomainResidualVector()

OpDomainResidualVector::OpDomainResidualVector ( std::string  field_name, boost::shared_ptr< MatrixDouble >  field_grad_mat  )

inline

Definition at line 120 of file minimal_surface_equation.cpp.

      : AssemblyDomainEleOp(field_name, field_name, AssemblyDomainEleOp::OPROW),
        fieldGradMat(field_grad_mat) {}

Member Function Documentation

iNtegrate()

MoFEMErrorCode OpDomainResidualVector::iNtegrate ( EntData &  data )

inlinevirtual

Class dedicated to integrate operator.

Parameters

data	entity data on element row

Returns

error code

Reimplemented from MoFEM::OpBaseImpl< A, EleOp >.

Definition at line 125 of file minimal_surface_equation.cpp.

                                          {
    MoFEMFunctionBegin;
 
    auto &nf = AssemblyDomainEleOp::locF;
 
    // get element area
    const double area = getMeasure();
 
    // get number of integration points
    const int nb_integration_points = getGaussPts().size2();
    // get integration weights
    auto t_w = getFTensor0IntegrationWeight();
    // get gradient of the field at integration points
    auto t_field_grad = getFTensor1FromMat<2>(*fieldGradMat);
 
    // get base functions
    auto t_base = data.getFTensor0N();
    // get derivatives of base functions
    auto t_diff_base = data.getFTensor1DiffN<2>();
 
    // START THE LOOP OVER INTEGRATION POINTS TO CALCULATE LOCAL VECTOR
    for (int gg = 0; gg != nb_integration_points; gg++) {
 
      const double a = t_w * area;
      const double an = 1. / std::sqrt(1 + t_field_grad(i) * t_field_grad(i));
 
      for (int rr = 0; rr != AssemblyDomainEleOp::nbRows; rr++) {
 
        // calculate components of the local vector
        // remember to use -= here due to PETSc consideration of Residual Vec
        nf[rr] += (t_diff_base(i) * t_field_grad(i)) * an * a;
 
        // move to the next base function
        ++t_base;
        // move to the derivatives of the next base function
        ++t_diff_base;
      }
 
      // move to the weight of the next integration point
      ++t_w;
      // move to the gradient of the field at the next integration point
      ++t_field_grad;
    }
 
    MoFEMFunctionReturn(0);
  }

Member Data Documentation

fieldGradMat

boost::shared_ptr<MatrixDouble> OpDomainResidualVector::fieldGradMat

private

Definition at line 173 of file minimal_surface_equation.cpp.

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The documentation for this struct was generated from the following file:

• users_modules/tutorials/scl-5/minimal_surface_equation.cpp