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

This option is used to enable linear solver parameters for solving the conduction equations in Abaqus/CFD. It must be used in conjunction with the *CFD or *HEAT TRANSFER options.

Products: Abaqus/CFD  

Type: History data

Level: Step

References:

Optional parameters:

CONVERGENCE

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

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

DIAGNOSTICS

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

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

TYPE

Set TYPE=DSCG to enable the Diagonal Scaled Conjugate Gradient linear solver.

Set TYPE=SSORCG to enable the Symmetric Successive Over Relaxation Conjugate Gradient linear solver.

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

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

Set TYPE=AMG to enable the Algebraic Multigrid linear solver.

The default is TYPE=DSCG if the node-centered solver is selected and TYPE=DSFGMRES if the element-centered solver is selected.

Data line for TYPE=DSCG and TYPE=SSORCG: 

First (and only) line:

  1. Maximum number of iterations (default=250).

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

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

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

Data line for TYPE=DSGMRES and TYPE=DSFGMRES: 

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

Data lines for TYPE=AMG: 

First line:

  1. Maximum number of iterations (default=250).

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

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

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

Second line:

  1. Specify the algebraic multigrid smoother as CHEBYCHEV, ILU, ICC, or SSOR (default=ICC).

  2. Number of pre-coarsening smoothing steps (default=1).

  3. Number of post-coarsening smoothing steps (default=1).

  4. Specify the Krylov solver as CG, BCGS, or FGMRES (default=CG).

Third line:

  1. Specify the algebraic multigrid cycle as V or W (default=V).