GMS:PCGN Package: Difference between revisions

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The ''MODFLOW PCGN Solver'' dialog has the following options:
The ''MODFLOW PCGN Solver'' dialog has the following options:
* Comments (Text)
* ''Comments (Text)'' – Allows up to 199 characters.
* Max number of outer iterations (ITER_MO)
* Max number of outer iterations (ITER_MO)
* Max number of inner iterations (ITER_MI)
* Max number of inner iterations (ITER_MI)

Revision as of 17:46, 8 July 2016

MODFLOW
Pre-processing
MODFLOW Commands
Building a MODFLOW Model
Map to MODFLOW
Calibration
Packages Supported in GMS
Saving a MODFLOW Simulation
Importing MODFLOW Files
Unsupported MODFLOW Features
Run MODFLOW
Post-processing
MODFLOW Display Options
MODFLOW Post-Processing Viewing Options
Reading a MODFLOW Simulation
Tutorials
Packages
Flow: BCF6, HUF, LPF, UPW
Solvers:

DE4, GMG, NWT, PCG,

PCGN, LMG, SIP, SOR,

SMS
Other:

BAS6, BFH, CHD1, CLN,

DRN1, DRT1, EVT1, ETS1,

GAGE, GHB1, GNC, HFB1,

HUF, LAK3, MNW1, MNW2,

OUT1, RCH1, RIV1, SFR2,

STR1, SUB1, SWI2, WEL1,

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) – Allows up to 199 characters.
  • 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

The MODFLOW PCGN Solver package dialog.