GMS:NWT Package: Difference between revisions
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** MODERATE – Indicates that default solver input values will be defined that work well for moderately nonlinear models. | ** MODERATE – Indicates that default solver input values will be defined that work well for moderately nonlinear models. | ||
** COMPLEX – Indicates that default solver input values will be defined that work well for highly nonlinear models. | ** COMPLEX – Indicates that default solver input values will be defined that work well for highly nonlinear models. | ||
==General Specified Options== | ==General Specified Options== | ||
*Coefficient to reduce weight applied to head change (DBDTHETA) | *Coefficient to reduce weight applied to head change (DBDTHETA) | ||
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*Proportional decrease in root-mean-squared error (BACKTOL) | *Proportional decrease in root-mean-squared error (BACKTOL) | ||
*Reduction factor for residual control that reduces head change (BACKREDUCE) | *Reduction factor for residual control that reduces head change (BACKREDUCE) | ||
==GMRES Specified Options== | ==GMRES Specified Options== | ||
*Max number of iterations for the linear solution (MAXITINNER) | *Max number of iterations for the linear solution (MAXITINNER) | ||
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*Tolerance for convergence of linear solver (STOPTOL) | *Tolerance for convergence of linear solver (STOPTOL) | ||
*Number of iterations between restarts of GMRES (MSDR) | *Number of iterations between restarts of GMRES (MSDR) | ||
==χMD Specified Options== | ==χMD Specified Options== | ||
*Acceleration method (IACL) | *Acceleration method (IACL) | ||
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*Head closure criteria for inner (linear) iterations (HCLOSEXMD) | *Head closure criteria for inner (linear) iterations (HCLOSEXMD) | ||
*Max number of iterations for linear solution (MXITERXMD) | *Max number of iterations for linear solution (MXITERXMD) | ||
==References== | ==References== | ||
For more information on the NWT package see the USGS documentation at: [http://water.usgs.gov/nrp/gwsoftware/modflow2000/MFDOC/nwt_newton_solver.htm water.usgs.gov/nrp/gwsoftware/modflow2000/MFDOC/nwt_newton_solver.htm] | For more information on the NWT package see the USGS documentation at: [http://water.usgs.gov/nrp/gwsoftware/modflow2000/MFDOC/nwt_newton_solver.htm water.usgs.gov/nrp/gwsoftware/modflow2000/MFDOC/nwt_newton_solver.htm] | ||
