Changes between Version 230 and Version 231 of doc/app/initialization_parameters

Timestamp:

Mar 24, 2014 6:21:58 PM (11 years ago)

Author:

suehring

Comment:

--

doc/app/initialization_parameters

@@ -1151 +1151 @@
 {{{#!td
 Parameter to choose the advection/timestep scheme to be used for the subgrid-scale TKE.\\\\
-By default, the advection scheme and the timestep scheme to be used for the subgrid-scale TKE are set by the initialization parameters [#scalar_advec scalar_advec] and [#timestep_scheme timestep_scheme], respectively. '''use_upstream_for_tke''' = ''.T.'' forces the Euler-scheme and the upstream-scheme to be used as timestep scheme and advection scheme, respectively. By these methods, the strong (artificial) near-surface vertical gradients of the subgrid-scale TKE are significantly reduced. This is required when subgrid-scale velocities are used for advection of particles (see particle package parameter [../parpar#use_sgs_for_particles use_sgs_for_particles]).
+By default, the advection scheme and the timestep scheme to be used for the subgrid-scale TKE are set by the initialization parameters [#scalar_advec scalar_advec] and [#timestep_scheme timestep_scheme], respectively. '''use_upstream_for_tke''' = ''.T.'' forces the Euler-scheme and the upstream-scheme to be used as timestep scheme and advection scheme, respectively. By these methods, strong artificial near-surface vertical gradients of the subgrid-scale TKE, as they will be caused by non-diffusive advection schemes, are avoided. '''use_upstream_for_tke''' = ''.T.'' is required when subgrid-scale velocities are used for advection of particles (see particle package parameter [../parpar#use_sgs_for_particles use_sgs_for_particles]) and [#scalar_advec scalar_advec] /= 'ws-scheme'.
 }}}