/// <summary>
///
/// </summary>
/// <returns></returns>
protected override MsrMatrix ComputeMatrix()
{
MsrMatrix CorrectorMatrix = new MsrMatrix(m_IPOperator.OperatorMatrix);
switch (m_SolverConf.Control.Algorithm)
{
case SolutionAlgorithms.Steady_SIMPLE:
break;
case SolutionAlgorithms.Unsteady_SIMPLE:
// gamma * dt / (beta_0 + gamma * dt)
double UnsteadyFactor = m_BDF.gamma[m_SolverConf.BDFOrder - 1] * m_SolverConf.dt / (m_BDF.beta[m_SolverConf.BDFOrder - 1][0] + m_BDF.gamma[m_SolverConf.BDFOrder - 1] * m_SolverConf.dt);
CorrectorMatrix.Scale(UnsteadyFactor);
break;
default:
throw new NotImplementedException();
}
if (m_PressureStabilization != null)
{
CorrectorMatrix.Acc(-1.0, m_PressureStabilization.OperatorMatrix);
}
CorrectorMatrix.AssumeSymmetric = true;
return(CorrectorMatrix);
}
public void ImplicitEuler(double dt, SubGrid S, SinglePhaseField inout_Levset)
{
var VolMsk = S.VolumeMask;
var EdgMsk = S.InnerEdgesMask;
UnsetteledCoordinateMapping Map = inout_Levset.Mapping;
if (dt <= 0.0)
{
throw new ArgumentOutOfRangeException("Timestep size must be greater than 0.");
}
MsrMatrix Pmtx = PenaltyMatrix(EdgMsk, inout_Levset.Basis, inout_Levset.Basis);
Pmtx.Scale(-1.0);
int[] SubVecIdx = Map.GetSubvectorIndices(S, true, new int[] { 0 });
int L = SubVecIdx.Length;
MsrMatrix SubMtx = new MsrMatrix(L, L);
Pmtx.AccSubMatrixTo(1.0, SubMtx, SubVecIdx, default(int[]), SubVecIdx, default(int[]));
SubMtx.AccEyeSp(1.0 / dt);
double[] RHS = new double[L];
double[] SOL = new double[L];
RHS.AccV(1.0 / dt, inout_Levset.CoordinateVector, default(int[]), SubVecIdx);
using (var solver = new PARDISOSolver()) {
solver.DefineMatrix(SubMtx);
solver.Solve(SOL, RHS);
}
inout_Levset.CoordinateVector.ClearEntries(SubVecIdx);
inout_Levset.CoordinateVector.AccV(1.0, SOL, SubVecIdx, default(int[]));
}
public SolverResult Solve <Tdiag, Tunknowns, Trhs>(double Scale, Tdiag d, Tunknowns x, Trhs rhs)
where Tdiag : System.Collections.Generic.IList <double>
where Tunknowns : System.Collections.Generic.IList <double>
where Trhs : System.Collections.Generic.IList <double>
{
using (var tr = new FuncTrace()) {
// check input arguments
// =====================
if (x.Count != m_OrgMatrix.RowPartitioning.LocalLength)
{
throw new ArgumentException("length of x must be equal to matrix size.");
}
if (rhs.Count != m_OrgMatrix.RowPartitioning.LocalLength)
{
throw new ArgumentException("length of rhs must be equal to matrix size.");
}
if (Math.Abs(Scale) <= double.Epsilon)
{
throw new ArgumentException("scale to small.");
}
// prepare vectors
// ===============
double[] _x;
double[] _rhs;
if (x.GetType() == typeof(double[]))
{
_x = x as double[];
}
else
{
_x = new double[x.Count];
}
if (rhs.GetType() == typeof(double[]))
{
_rhs = (double[])((ICloneable)rhs).Clone();
}
else
{
int L = m_MumpsMatrix.RowPart.LocalLength;
_rhs = new double[L];
for (int i = 0; i < L; i++)
{
_rhs[i] = rhs[i];
}
}
// define matrix
// =============
IMutableMatrixEx Mtx;
//bool throwAwayMtx;
if (d != null || Scale != 1.0)
{
// not very efficient, but _I_dont_care_ !
MsrMatrix _Mtx = new MsrMatrix(m_OrgMatrix);
Mtx = _Mtx;
_Mtx.Scale(Scale);
int dLen = d.Count, L = _Mtx.RowPartitioning.LocalLength, i0 = (int)(_Mtx.RowPartitioning.i0);
if ((L % dLen) != 0)
{
throw new ApplicationException("wrong length of 'd'.");
}
for (int l = 0; l < L; l++)
{
_Mtx[i0 + l, i0 + l] += d[l % dLen];
}
//throwAwayMtx = true;
}
else
{
//throwAwayMtx = false;
Mtx = m_OrgMatrix;
}
// call solver
// ===========
SolverResult r = new SolverResult();
using (new BlockTrace("CALL SOLVER", tr)) {
r.Converged = true;
r.NoOfIterations = 1;
Stopwatch st = new Stopwatch();
st.Reset();
double[] gath_x, gath_b;
GatherOnProc0(_x, _rhs, out gath_x, out gath_b);
r.NoOfIterations = 1;
int rank; int size;
csMPI.Raw.Comm_Rank(this.m_MPI_Comm, out rank);
csMPI.Raw.Comm_Size(this.m_MPI_Comm, out size);
r.Converged = MUMPSInitAndSolve(m_OrgMatrix, gath_b);
csMPI.Raw.Barrier(this.m_MPI_Comm);
unsafe
{
bool snd = r.Converged;
csMPI.Raw.Bcast((IntPtr)(&snd), 1, csMPI.Raw._DATATYPE.BYTE, 0, this.m_MPI_Comm);
r.Converged = snd;
}
ScatterFromProc0(_x, gath_b);
if (x.GetType() == typeof(double[]))
{
// do nothing
}
else
{
x.SetV(_x);
}
csMPI.Raw.Barrier(this.m_MPI_Comm);
st.Stop();
r.RunTime = st.Elapsed;
}
return(r);
}
}
