Changes between Version 182 and Version 183 of doc/app/initialization_parameters

Timestamp:

Sep 27, 2012 11:48:19 AM (12 years ago)

Author:

raasch

Comment:

--

doc/app/initialization_parameters

@@ -1088 +1088 @@
 {{{#!td
 Bottom boundary condition of the TKE.\\\\
-'''bc_e_b''' may be set to '' 'neumann' '' or '' '(u*){{{**}}}2+neumann' ''. '''bc_e_b''' = '' 'neumann' '' yields to e(k=0)=e(k=1) (Neumann boundary condition), where e(k=1) is calculated via the prognostic TKE equation. Choice of '' '(u*){{{**}}}2+neumann' '' also yields to e(k=0)=e(k=1), but the TKE at the Prandtl-layer top (k=1) is calculated diagnostically by e(k=1)=(us/0.1){{{**}}}2. However, this is only allowed if a Prandtl-layer is used ([#prandtl_layer prandtl_layer]). If this is not the case, a warning is given and '''bc_e_b''' is reset to '' 'neumann' ''.\\\\
+'''bc_e_b''' must be set to '' 'neumann' '' i.e. e(k=0)=e(k=1) (Neumann boundary condition), where e(k=1) is calculated via the prognostic TKE equation.\\\\
 At the top boundary a Neumann boundary condition is generally used: (e(nz+1) = e(nz)).
 }}}
@@ -1399 +1399 @@
 Parameter to switch on a Prandtl layer.\\\\
 By default, a Prandtl layer is switched on at the bottom boundary between z = 0 and z = 0.5 * [#dz dz] (the first computational grid point above ground for u, v and the scalar quantities). In this case, at the bottom boundary, free-slip conditions for u and v (see [#bc_uv_b bc_uv_b]) are not allowed. Likewise, laminar simulations with constant eddy diffusivities ([#km_constant km_constant]) are forbidden.\\\\
-With Prandtl-layer switched off, the TKE boundary condition [#bc_e_b bc_e_b] = '' '(u*){{{**}}}2+neumann' '' must not be used and is automatically changed to '' 'neumann' '' if necessary. Also, the pressure boundary condition [#bc_p_b bc_p_b] = '' 'neumann+inhomo' ''  is not allowed.\\\\
+With Prandtl-layer switched off, the pressure boundary condition [#bc_p_b bc_p_b] = '' 'neumann+inhomo' ''  is not allowed.\\\\
 If the Prandtl-layer is switched off and fluxes shall be prescribed at the surface (by setting [#surface_heatflux surface_heatflux]), it is required to set the parameter [#use_surface_fluxes use_surface_fluxes] = ''.T.''.\\\\
 The roughness length is declared via the parameter [#roughness_length roughness_length].