GMS:PCGN Package
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| Flow: | BCF6, HUF, LPF, UPW |
| Solvers: | SMS |
| Other: | UZF1 |
The PCGN package or Preconditioned Conjugate Gradient Solver with Improved Nonlinear Control is one of the solvers available for MODFLOW-2005. Using the PCGN solver a specific GMS MODFLOW executable (mf2k5_..._parallel.exe) can be run with parallel processing on a single machine (though not across multiple machines on a network) greatly reducing runtime.
The MODFLOW PCGN Solver dialog has the following options:
- Comments (Text)
- Max number of outer iterations (ITER_MO)
- Max number of inner iterations (ITER_MI)
- Head change criterion for convergence (CLOSE_R)
- Residual criterion for convergence (CLOSE_H)
- Relaxation parameter (RELAX)
- Preconditioner fill level (IFILL)
- (0) Less preconditioning
- (1) More preconditioning
- Damping mode (ADAMP)
- (0) Ordinary
- (1) Adaptive
- (2) Enhanced
- Damping restriction (DAMP)
- Damping bound (DAMP_LB)
- Rate (RATE_D)
- Maximum head change (CHGLIMIT)
- Convergence mode (ACNVG)
- (0) Standard
- (1) Adaptive
- (2) Enhanced
- Minimum relative convergence (CNVG_LB)
- Relative convergence increase power (MCNVG)
- Relative convergence enhancement (RATE_C)
- Progress reporting (IPUNIT)
- (-1) None
- (0) Listing file
- (1) CSV file
For more information on this solver see the USGS documentation at http://water.usgs.gov/nrp/gwsoftware/modflow2000/MFDOC/pcgn.htm
| GMS – Groundwater Modeling System | ||
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