mathcomp.assemble.discontinuousgalerkin
Class DGAssembler

java.lang.Object
  mathcomp.monitor.DefaultReportable
      mathcomp.monitor.DefaultAlgorithm
          mathcomp.assemble.Assembler
              mathcomp.assemble.discontinuousgalerkin.DGAssembler

All Implemented Interfaces:

java.lang.Runnable, Algorithm, Reportable

Direct Known Subclasses:

TimeIndependentAssembler

public abstract class DGAssembler
extends Assembler

Field Summary

Fields inherited from class mathcomp.assemble.Assembler

dirichletBoundaryValues, solScale

Constructor Summary

DGAssembler()

Method Summary

void	createDof(Grid grid, java.util.Set dof) All global Objects, that represent a degreeOfFreedom are added to dof.
Surface[]	createSurfaces(Vector x) Generates and returns an array of Surface Objects.
double	evalApproxSolution(Node n, Triangle t, Vector x) Evaluates the FEM solution in a Node.
double[]	evalBasisFuncGradOnRef(int localBasisNumber)
double	evalBasisFuncOnRef(Node u, int localBasisNumber)
double	evalExactSolution(Node n) For error calculations we need to know the exact solution of a problem.
double	evalF(Node n) Evaluates the right hand side function f on the Node n
abstract double	evalG(Node n, double time) computes the value of the right hand side coefficient function of the convection-diffusion problem.
abstract double	evalUd(Node n, double time) Computes the value of the time dependent Dirichlet data in the point (n, time) of the convection-diffusion problem.
Edges	getEdges()
ErrorCalculator	getErrorCalculator()
void	iniQuadrature() Used to initialize the quadrature rules that are going to be used.

Methods inherited from class mathcomp.assemble.Assembler

addDirichletNodes, assembleGlobal, calcDirichletBoundary, createSurfaces, evalApproxGradient, evalExactGradient, getDof, getElementMatrix, getEpsilon, getExactPartialX, getExactPartialY, getGrid, getInfoUrl, getM, getPreferredGridFileName, getSolScale, getY, report, run, setEpsilon, setGrid, setM, setTauIndex, setY, toString

Methods inherited from class mathcomp.monitor.DefaultAlgorithm

algoAbortIfNeeded, algoCancel, algoClear, algoCount, algoIncrement, algoMax, isAlgoCancel, setAlgoCount, setAlgoMax

Methods inherited from class mathcomp.monitor.DefaultReportable

getReport, setReport

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface mathcomp.monitor.Reportable

getReport, setReport

Constructor Detail

DGAssembler

public DGAssembler()

Method Detail

createDof

public void createDof(Grid grid,
                      java.util.Set dof)

Description copied from class: Assembler

All global Objects, that represent a degreeOfFreedom are added to dof.

Specified by:

createDof in class Assembler

Parameters:

grid - the current grid

dof - the Set where the DOFs have to be put in

evalBasisFuncOnRef

public double evalBasisFuncOnRef(Node u,
                                 int localBasisNumber)

evalBasisFuncGradOnRef

public double[] evalBasisFuncGradOnRef(int localBasisNumber)

iniQuadrature

public void iniQuadrature()

Used to initialize the quadrature rules that are going to be used.

evalApproxSolution

public double evalApproxSolution(Node n,
                                 Triangle t,
                                 Vector x)

Description copied from class: Assembler

Evaluates the FEM solution in a Node. To do that we do need the triangle. We need this method for an easy l2 and l\infty error calculation.

Specified by:

evalApproxSolution in class Assembler

Parameters:

n - Node where the solution has to be evaluated

t - the triangle that contains the Node n

x - the solution vector

Returns:

the value of the solution in n

evalExactSolution

public double evalExactSolution(Node n)

Description copied from class: Assembler

For error calculations we need to know the exact solution of a problem. If we don't know that, return 0.0 for every node n.

Overrides:

evalExactSolution in class Assembler

Parameters:

n - node where the exact solution should be evaluated

evalG

public abstract double evalG(Node n,
                             double time)

computes the value of the right hand side coefficient function of the convection-diffusion problem.

evalUd

public abstract double evalUd(Node n,
                              double time)

Computes the value of the time dependent Dirichlet data in the point (n, time) of the convection-diffusion problem.

createSurfaces

public Surface[] createSurfaces(Vector x)

Description copied from class: Assembler

Generates and returns an array of Surface Objects. This contains the data for the java3D plots. For every basis type, this draws only triangles by evaluating the solution in the corner nodes of the triangle. By convention th order of the four objects is [approx, error, exact, empty]

Overrides:

createSurfaces in class Assembler

Parameters:

x - the FE-solution vector

Returns:

the generated Suface object

getErrorCalculator

public ErrorCalculator getErrorCalculator()

Overrides:

getErrorCalculator in class Assembler

evalF

public double evalF(Node n)

Description copied from class: Assembler

Evaluates the right hand side function f on the Node n

Specified by:

evalF in class Assembler

Parameters:

n - the Node where f is evaluated

Returns:

the evaluation value

getEdges

public Edges getEdges()