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*MOMENTUM EQUATION SOLVER
Specify the linear solver and parameters for solving the momentum equations in an Abaqus/CFD analysis.

This option can be used only as a suboption of the *CFD option to enable the linear solver parameters for solving the momentum equations. For a steady-state analysis this option is also used to enable the under-relaxation parameter for the nonlinear momentum solver.

Products: Abaqus/CFD  Abaqus/CAE  

Type: History data

Level: Step

Abaqus/CAE: Step module

References:

Optional parameters:

CONVERGENCE

Set CONVERGENCE=ON to write convergence information in the log file.

Set CONVERGENCE=OFF (default) to suppress convergence information.

DIAGNOSTICS

Set DIAGNOSTICS=ON to write diagnostic information about the solver in the log file.

Set DIAGNOSTICS=OFF (default) to suppress diagnostic information.

TYPE

Set TYPE=DSFGMRES (default) to enable the Diagonally Scaled Flexible Generalized Minimum Residual linear solver.

Set TYPE=DSGMRES to enable the Diagonally Scaled Generalized Minimum Residual linear solver.

Set TYPE=ILUFGMRES to enable the Incomplete LU factorization preconditioned Flexible Generalized Minimum Residual linear solver.

Data line for TYPE=DSFGMRES, TYPE=DSGMRES, and TYPE=ILUFGMRES: 

First (and only) line:

  1. Maximum number of iterations (default=50).

  2. Interval to check linear convergence (default=2).

  3. Linear convergence criterion (default=10–5).

  4. Number of restart vectors (default=15).

  5. Under-relaxation factor (default=0.7). This value is valid only for a steady-state analysis.