Changes between Version 456 and Version 457 of doc/app/initialization_parameters

Timestamp:

Feb 4, 2020 2:54:28 PM (5 years ago)

Author:

Giersch

Comment:

--

doc/app/initialization_parameters

@@ -1825 +1825 @@
 }}}
 {{{#!td style="vertical-align:top"
-no prescribed\\
-scalarflux
+9999999.9
 }}}
 {{{#!td
 Scalar flux at the surface (in kg m^-2^ s^-1^ (particle flux) or ppm m s^-1^ (gaseous flux)).\\\\
-If a non-zero value is assigned to this parameter, the respective scalar flux value is used as bottom (horizontally homogeneous) boundary condition for the scalar concentration equation. This additionally requires that a Neumann condition must be used for the scalar concentration (see [#bc_s_b bc_s_b]), because otherwise the resolved scale may contribute to the surface flux so that a constant value cannot be guaranteed. Also, changes of the surface scalar concentration (see [#s_surface_initial_change s_surface_initial_change]) are not allowed.\\\\
+If a value is assigned to this parameter, the respective scalar flux value is used as bottom (horizontally homogeneous) boundary condition for the scalar concentration equation. This additionally requires that a Neumann condition must be used for the scalar concentration (see [#bc_s_b bc_s_b]), because otherwise the resolved scale may contribute to the surface flux so that a constant value cannot be guaranteed. Also, changes of the surface scalar concentration (see [#s_surface_initial_change s_surface_initial_change]) are not allowed.\\\\
 If no surface scalar flux is assigned ('''surface_scalarflux''' = ''0.0''), it is calculated at each time step by u,,*,, {{{*}}} s,,*,, (of course only with [#constant_flux_layer constant_flux_layer] switched on). Here, s,,*,, is calculated from Monin-Obukhov similarity theory assuming a logarithmic scalar concentration profile between k=0 and k=1. In this case, a Dirichlet condition (see bc_s_b) must be used as bottom boundary condition for the scalar concentration.
 }}}