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amgSymSolver.H File Reference


Detailed Description

View amgSymSolver.H
License
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Description
Agglomerated algebraic multigrid solver tuned for the FV elliptic matrices.

  Characteristics:
  - Specific for elliptic matrices (symmetric positive definite, diagonally
    equal or better).
  - Choice of smoother: Gauss-Seidel (assymetric).
  - Restriction operator: summation (zero-order).
  - Prolongation operator: injection (zero-order).
  - Agglomeration algorithm: single-pass pairwise agglomeration with change
    of direction between levels.
  - Coarse matrix creation: central coefficient: summation of fine grid
    central coefficients with the removal of intra-cluster face;
    off-diagonal coefficient: summation of off-diagonal faces.
  - Coarse matrix scaling: performed by correction scaling, using steepest
    descent optimisation.
  - Type of cycle: Saw-tooth (V-cycle with no pre-smoothing). Top-level
    matrices below 100 equations solved using CG.

Source files

Definition in file amgSymSolver.H.

Go to the source code of this file.

Namespaces

namespace  Foam

Classes

class  amgSymSolver

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