Changes between Version 296 and Version 297 of doc/app/initialization_parameters

Timestamp:

Aug 12, 2016 10:03:33 AM (8 years ago)

Author:

suehring

Comment:

--

doc/app/initialization_parameters

@@ -2572 +2572 @@
 Non-flat '''topography''' modes may assign a kinematic sensible [#wall_heatflux wall_heatflux] and a kinematic [#wall_humidityflux wall_humidityflux] (requires [#humidity humidity] = .T.) or a [#wall_scalarflux wall_scalarflux] (requires [#passive_scalar passive_scalar] = .T.) at the five topography faces.\\\\
 All non-flat '''topography''' modes require the use of [#psolver psolver] /= '' 'sor' '',  [#alpha_surface alpha_surface] = 0.0, [#galilei_transformation galilei_transformation] = ''.F.'', [#cloud_droplets cloud_droplets] = ''.F.'' (has not been tested), and [#constant_flux_layer constant_flux_layer] = ''.T.''.\\\\
+
+'''Note: ''' In case there are holes in the topography that are resolved by only one grid point, the topography array in filtered so that such holes are filled up to the minimum topography height of the directly adjoining grid points in the x- and the y-direction. This is necessary, because for such chimney-like features resolved by one grid point, the continuity equation is not fulfilled on a discrete grid, as the only degree of freedom for the pressure solver is the vertical. Such holes are suspected to lead to unrealistic velocity blow-ups, hence, they are filled up. \\
+
 Note that an inclined model domain requires the use of [#topography topography] = '' 'flat' '' and a nonzero alpha_surface.
 }}}