Changes between Version 420 and Version 421 of doc/app/initialization_parameters

Timestamp:

Jul 9, 2019 5:23:37 PM (6 years ago)

Author:

suehring

Comment:

--

doc/app/initialization_parameters

@@ -941 +941 @@
 '' 'up-scheme' ''\\\\
       First-order upstream scheme. The upstream scheme is guarantees only a stable solution in combination with [#timestep_scheme timestep_scheme] = '' 'euler' ''. Note, this scheme is very diffusive, and hence, not well-suited for turbulence-resolving simulations. 
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#monotonic_limiter_z '''monotonic_limiter_z''']
+}}}
+{{{#!td style="vertical-align:top"
+C*10
+}}}
+{{{#!td style="vertical-align:top"
+.F.
+}}}
+{{{#!td
+Control flag that enables a monotonic flux limiter for the vertical advection of passive scalars according to Skamarock (2006, Mon. Wea. Rev 134, 2241-2250). If the limiter is enabled, vertical scalar advection will be monotone and positive definite but strong gradients may be smoothed. 
+This will avoid numerical oscillation that can cause unrealistically high concentrations within poorly resolved cavities within urban environments, e.g. narrow street canyons, which can spoil the entire simulation results. 
+Please note, the limiter is only effective up to the height of the highest topography.  
+
+Please note, this parameter becomes only effective if [#scalar_advec scalar_advec] = 'ws-scheme' is set. Moreover, please note that the monontonic limiter is currently only implemented for [#loop_optimization loop_optimization] = 'cache'. 
 }}}
 |----------------