Changes between Version 55 and Version 56 of doc/app/runtime_parameters

Timestamp:

Sep 14, 2010 7:52:45 AM (15 years ago)

Author:

weinreis

Comment:

--

doc/app/runtime_parameters

@@ -133 +133 @@
 {{{#!td
 Switch to steer the call of the pressure solver.\\\\
-In order to speed-up performance, the Poisson equation for perturbation pressure (see [[psolver]]) can be called only at the last substep of multistep Runge-Kutta timestep schemes (see [[timestep_scheme]]) by setting '''call_psolver_at_all_substeps''' = ''.F.''. In many cases, this sufficiently reduces the divergence of the velocity field. Nevertheless, small-scale ripples (2-delta-x) may occur. In this case and in case of non-cyclic lateral boundary conditions, '''call_psolver_at_all_timesteps''' = ''.T.'' should be used. 
+In order to speed-up performance, the Poisson equation for perturbation pressure (see [[../inipar#psolver|psolver]]) can be called only at the last substep of multistep Runge-Kutta timestep schemes (see [[../inipar#timestep_scheme|timestep_scheme]]) by setting '''call_psolver_at_all_substeps''' = ''.F.''. In many cases, this sufficiently reduces the divergence of the velocity field. Nevertheless, small-scale ripples (2-delta-x) may occur. In this case and in case of non-cyclic lateral boundary conditions, '''call_psolver_at_all_timesteps''' = ''.T.'' should be used. 
 }}}
 |----------------
@@ -147 +147 @@
 {{{#!td
 Time step limiting factor.\\\\
-In the model, the maximum allowed time step according to CFL and diffusion-criterion dt_max is reduced by [[dt]] = dt_max * '''cfl_factor''' in order to avoid stability problems which may arise in the vicinity of the maximum allowed timestep. The condition 0.0 < '''cfl_factor''' < 1.0 applies.\\\\
-The default value of cfl_factor depends on the [[timestep_scheme]] used:\\\\
+In the model, the maximum allowed time step according to CFL and diffusion-criterion dt_max is reduced by [#dt dt] = dt_max * '''cfl_factor''' in order to avoid stability problems which may arise in the vicinity of the maximum allowed timestep. The condition ''0.0'' < '''cfl_factor''' < ''1.0'' applies.\\\\
+The default value of cfl_factor depends on the [[../inipar#timestep_scheme|timestep_scheme]] used:\\\\
 For the third order Runge-Kutta scheme it is '''cfl_factor''' = 0.9.\\\\
 In case of the leapfrog scheme a quite restrictive value of '''cfl_factor''' = 0.1 is used because for larger values the velocity divergence significantly effects the accuracy of the model results. Possibly larger values may be used with the leapfrog scheme but these are to be determined by appropriate test runs.\\\\