Changes between Version 171 and Version 172 of doc/app/initialization_parameters

Timestamp:

Mar 28, 2012 11:59:22 AM (13 years ago)

Author:

suehring

Comment:

--

doc/app/initialization_parameters

@@ -759 +759 @@
 The user can choose between the following schemes:\\\\
 '' 'ws-scheme' ''\\\\
-      The 5th order upwind scheme of Wicker and Skamarock (2002, Mon. Wea. Rev, 130, 2088-2097) is used. The dispersion error is     much smaller than the dispersion error of '' 'pw-scheme' ''. The 5th order scheme implies a small numerical dissipation that stabilizes the solution. To assure a stable numerical solution the time integration has to be carried out with [#timestep_scheme timestep_scheme] = '' 'runge-kutta-3' '' . This scheme is based on a formulation of the advection term in flux form, which requires a vanishing divergence of the flow field, else a stable numerical solution is not given. So [#call_psolver_at_all_substeps call_psolver_at_all_substeps] = '' .T. '' has to be used. When [#psolver psolver] = '' 'multigrid' '' the [#residual_limit residual_limit] should be smaller than 1.0E-7 for a sufficient reduction of the divergences. So far the scheme can only be used in conjunction with [#topography topography] = '' 'flat' ''. So far [#bc_lr bc_lr] /= '' 'cyclic' '' or [#bc_ns bc_ns] /= '' 'cyclic' '' are not allowed with [#loop_optimization loop_optimization] = '' 'vector' '' in combination with '' 'ws-scheme' ''.
-
+      The 5th order upwind scheme of Wicker and Skamarock (2002, Mon. Wea. Rev, 130, 2088-2097) is used. The dispersion error is     much smaller than the dispersion error of '' 'pw-scheme' ''. The 5th order scheme implies a small numerical dissipation that stabilizes the solution. To assure a stable numerical solution the time integration has to be carried out with [#timestep_scheme timestep_scheme] = '' 'runge-kutta-3' '' . This scheme is based on a formulation of the advection term in flux form, which requires a vanishing divergence of the flow field, else a stable numerical solution is not given. So [#call_psolver_at_all_substeps call_psolver_at_all_substeps] = '' .T. '' has to be used. 
 '''Note''': Due to the larger stencil of this scheme vertical grid stretching should be handled with care.
 The computation of turbulent fluxes takes place inside the advection routines to get a statistical evaluation consistent to the numerical solution. 
@@ -955 +954 @@
 The user can choose between the following schemes:\\\\
 '' 'ws-scheme' ''\\\\
-      The 5th order upwind scheme of Wicker and Skamarock (2002, Mon. Wea. Rev, 130, 2088-2097) is used. The dispersion error is     much smaller than the dispersion error of '' 'pw-scheme' ''. The 5th order scheme implies a small numerical dissipation that stabilizes the solution. To assure a stable numerical solution the time integration has to be carried out with [#timestep_scheme timestep_scheme] = '' 'runge-kutta-3' '' . This scheme is based on a formulation of the advection term in flux form, which requires a vanishing divergence of the flow field, else a stable numerical solution is not given. So [#call_psolver_at_all_substeps call_psolver_at_all_substeps] = '' .T. '' has to be used. When [#psolver psolver] = '' 'multigrid' '' the [#residual_limit residual_limit] should be smaller than 1.0E-7 for a sufficient reduction of the divergences. So far the scheme can only be used in conjunction with [#topography topography] = '' 'flat' ''. So far [#bc_lr bc_lr] /= '' 'cyclic' '' or [#bc_ns bc_ns] /= '' 'cyclic' '' are not allowed with [#loop_optimization loop_optimization] = '' 'vector' '' in combination with '' 'ws-scheme' ''.
-
+      The 5th order upwind scheme of Wicker and Skamarock (2002, Mon. Wea. Rev, 130, 2088-2097) is used. The dispersion error is     much smaller than the dispersion error of '' 'pw-scheme' ''. The 5th order scheme implies a small numerical dissipation that stabilizes the solution. To assure a stable numerical solution the time integration has to be carried out with [#timestep_scheme timestep_scheme] = '' 'runge-kutta-3' '' . This scheme is based on a formulation of the advection term in flux form, which requires a vanishing divergence of the flow field, else a stable numerical solution is not given. So [#call_psolver_at_all_substeps call_psolver_at_all_substeps] = '' .T. '' has to be used. 
 '''Note''': Due to the larger stencil of this scheme vertical grid stretching should be handled with care.
 The computation of turbulent fluxes takes place inside the advection routines to get a statistical evaluation consistent to the numerical solution.