GMS:NWT Package: Difference between revisions
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The Newton package (NWT) is one of the solvers available in MODFLOW-NWT. The NWT package is only used with the [[GMS:UPW Package|UPW Package]]. Using the NWT solver requires twice the memory of other MODFLOW solvers because using the Newton method results in an asymmetric matrix. Because of the asymmetric matrix a different matrix solver must be used. The NWT package provides an option to use one of two matrix solvers: a generalized-minimum-residual (GMRES) solver and an Orthomin/stabilized conjugate-gradient solver called ''x''MD (chi-MD). | The Newton package (NWT) is one of the solvers available in MODFLOW-NWT. The NWT package is only used with the [[GMS:UPW Package|UPW Package]]. Using the NWT solver requires twice the memory of other MODFLOW solvers because using the Newton method results in an asymmetric matrix. Because of the asymmetric matrix a different matrix solver must be used. The NWT package provides an option to use one of two matrix solvers: a generalized-minimum-residual (GMRES) solver and an Orthomin/stabilized conjugate-gradient solver called ''x''MD (chi-MD). | ||
For more information on the NWT package see the USGS documentation | 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] | ||
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