/// <summary>
/// Test on a Cartesian grid, with an exact polynomial solution.
/// </summary>
public static SipControl TestCartesian1(int xRes = 32, double xStretch = 1.0, int yRes = 16, double yStretch = 1.01, int pDG = 2)
{
var RR = new SipControl();
RR.ProjectName = "ipPoison/cartesian";
RR.savetodb = false;
RR.FieldOptions.Add("T", new FieldOpts()
{
Degree = pDG, SaveToDB = FieldOpts.SaveToDBOpt.TRUE
});
RR.FieldOptions.Add("Tex", new FieldOpts()
{
Degree = pDG * 2
});
RR.InitialValues_Evaluators.Add("RHS", X => 1.0);
RR.InitialValues_Evaluators.Add("Tex", X => (0.5 * X[0].Pow2() - 10 * X[0]));
RR.ExactSolution_provided = true;
RR.GridFunc = delegate() {
double[] xNodes = CreateNodes(xRes, xStretch, 0, 10);
double[] yNodes = CreateNodes(yRes, yStretch, -1, +1);
var grd = Grid2D.Cartesian2DGrid(xNodes, yNodes);
grd.EdgeTagNames.Add(1, BoundaryType.Dirichlet.ToString());
grd.EdgeTagNames.Add(2, BoundaryType.Neumann.ToString());
grd.DefineEdgeTags(delegate(double[] X) {
byte ret;
if (Math.Abs(X[0] - 0.0) <= 1.0e-6)
{
ret = 1;
}
else
{
ret = 2;
}
return(ret);
});
return(grd);
};
RR.AddBoundaryCondition(BoundaryType.Dirichlet.ToString());
RR.AddBoundaryCondition(BoundaryType.Neumann.ToString());
RR.GridPartType = BoSSS.Foundation.Grid.GridPartType.none;
return(RR);
}
/// <summary>
/// Test on a curved grid.
/// </summary>
public static SipControl TestCurved()
{
var R = new SipControl();
R.ProjectName = "ipPoison/curved";
R.savetodb = false;
R.FieldOptions.Add("T", new FieldOpts()
{
Degree = 2, SaveToDB = FieldOpts.SaveToDBOpt.TRUE
});
R.FieldOptions.Add("Tex", new FieldOpts()
{
Degree = 15
});
R.InitialValues_Evaluators.Add("RHS", X => 0.0);
R.InitialValues_Evaluators.Add("Tex", X => (Math.Log(X[0].Pow2() + X[1].Pow2()) / Math.Log(4.0)) + 1.0);
R.ExactSolution_provided = true;
R.GridFunc = delegate() {
var grd = Grid2D.CurvedSquareGrid(GenericBlas.Linspace(1, 2, 3), GenericBlas.Linspace(0, 1, 11), CellType.Square_9, true);
grd.EdgeTagNames.Add(1, BoundaryType.Dirichlet.ToString());
grd.DefineEdgeTags(X => 1);
return(grd);
};
R.AddBoundaryCondition(BoundaryType.Dirichlet.ToString(), "T",
delegate(double[] X) {
double x = X[0], y = X[1];
return(Math.Sqrt(x * x + y * y));
});
return(R);
}
/// <summary>
/// Poisson Equation on a (-1,1)x(-1,1), Dirichlet everywhere
/// </summary>
public static SipControl Square(int xRes = 21, int yRes = 16, int deg = 5)
{
//Func<double[], double> exRhs = X => 2 * X[0] * X[0] + 2 * X[1] * X[1] - 4;
//Func<double[], double> exSol = X => (1.0 - X[0] * X[0]) * (1.0 - X[1] * X[1]);
//Func<double[], double> exSol = X => (1.0 - X[1]);
//Func<double[], double> exRhs = X => 0.0;
Func <double[], double> exSol = X => - Math.Cos(X[0] * Math.PI * 0.5) * Math.Cos(X[1] * Math.PI * 0.5);
Func <double[], double> exRhs = X => (Math.PI * Math.PI * 0.5 * Math.Cos(X[0] * Math.PI * 0.5) * Math.Cos(X[1] * Math.PI * 0.5)); // == - /\ exSol
var R = new SipControl();
R.ProjectName = "ipPoison/square";
R.savetodb = false;
//R.DbPath = "D:\\BoSSS-db";
R.FieldOptions.Add("T", new FieldOpts()
{
Degree = deg, SaveToDB = FieldOpts.SaveToDBOpt.TRUE
});
R.FieldOptions.Add("Tex", new FieldOpts()
{
Degree = 4
});
R.InitialValues_Evaluators.Add("RHS", exRhs);
R.InitialValues_Evaluators.Add("Tex", exSol);
R.ExactSolution_provided = true;
R.GridFunc = delegate() {
double[] xNodes = GenericBlas.Linspace(-1, 1, xRes);
double[] yNodes = GenericBlas.Linspace(-1, 1, yRes);
var grd = Grid2D.Cartesian2DGrid(xNodes, yNodes);
grd.EdgeTagNames.Add(1, BoundaryType.Dirichlet.ToString());
grd.DefineEdgeTags(delegate(double[] X) {
byte ret = 1;
return(ret);
});
return(grd);
};
R.AddBoundaryCondition(BoundaryType.Dirichlet.ToString(), "T", exSol);
R.NoOfSolverRuns = 1;
return(R);
}
/// <summary>
/// Test on a Cartesian grid, with a sinusodial solution.
/// </summary>
/// <param name="Res">
/// Grid resolution
/// </param>
/// <param name="Dim">
/// spatial dimension
/// </param>
/// <param name="deg">
/// polynomial degree
/// </param>
/// <param name="solver_name">
/// Name of solver to use.
/// </param>
public static SipControl TestCartesian2(int Res, int Dim, SolverCodes solver_name = SolverCodes.exp_softpcg_mg, int deg = 3)
{
if (Dim != 2 && Dim != 3)
{
throw new ArgumentOutOfRangeException();
}
var R = new SipControl();
R.ProjectName = "ipPoison/cartesian";
R.savetodb = false;
R.FieldOptions.Add("T", new FieldOpts()
{
Degree = deg, SaveToDB = FieldOpts.SaveToDBOpt.TRUE
});
R.FieldOptions.Add("Tex", new FieldOpts()
{
Degree = deg * 2
});
R.InitialValues_Evaluators.Add("RHS", X => - Math.Sin(X[0]));
R.InitialValues_Evaluators.Add("Tex", X => Math.Sin(X[0]));
R.ExactSolution_provided = true;
R.NoOfMultigridLevels = int.MaxValue;
R.solver_name = solver_name;
//R.TargetBlockSize = 100;
R.GridFunc = delegate() {
GridCommons grd = null;
if (Dim == 2)
{
double[] xNodes = GenericBlas.Linspace(0, 10, Res * 5 + 1);
double[] yNodes = GenericBlas.SinLinSpacing(-1, +1, 0.6, Res + 1);
grd = Grid2D.Cartesian2DGrid(xNodes, yNodes);
}
else if (Dim == 3)
{
double[] xNodes = GenericBlas.Linspace(0, 10, Res * 5 + 1);
double[] yNodes = GenericBlas.SinLinSpacing(-1, +1, 0.6, Res + 1);
double[] zNodes = GenericBlas.SinLinSpacing(-1, +1, 0.6, Res + 1);
grd = Grid3D.Cartesian3DGrid(xNodes, yNodes, zNodes);
}
else
{
throw new NotSupportedException();
}
grd.EdgeTagNames.Add(1, BoundaryType.Dirichlet.ToString());
grd.EdgeTagNames.Add(2, BoundaryType.Neumann.ToString());
grd.DefineEdgeTags(delegate(double[] X) {
byte ret;
if (Math.Abs(X[0] - 0.0) <= 1.0e-6)
{
ret = 1;
}
else
{
ret = 2;
}
return(ret);
});
return(grd);
};
R.AddBoundaryCondition(BoundaryType.Dirichlet.ToString(), "T",
delegate(double[] X) {
double x = X[0], y = X[1];
if (Math.Abs(X[0] - (0.0)) < 1.0e-8)
{
return(0.0);
}
throw new ArgumentOutOfRangeException();
});
R.AddBoundaryCondition(BoundaryType.Neumann.ToString(), "T",
delegate(double[] X) {
if (Math.Abs(X[1] - 1.0) < 1.0e-8 || Math.Abs(X[1] + 1.0) < 1.0e-8) // y = -1, y = +1
{
return(0);
}
if (X.Length > 2 && (Math.Abs(X[2] - 1.0) < 1.0e-8 || Math.Abs(X[2] + 1.0) < 1.0e-8)) // z = -1, z = +1
{
return(0);
}
if (Math.Abs(X[0] - (+10.0)) < 1.0e-8)
{
return(Math.Cos(10.0));
}
throw new ArgumentOutOfRangeException();
});
return(R);
}
