Changes between Version 195 and Version 196 of doc/app/initialization_parameters

Timestamp:

Mar 8, 2013 10:50:06 AM (12 years ago)

Author:

raasch

Comment:

--

doc/app/initialization_parameters

@@ -1160 +1160 @@
 {{{#!td
 Bottom boundary condition of the perturbation pressure.\\\\
-Allowed values are '' 'dirichlet' '', '' 'neumann' '' and '' 'neumann+inhomo' ''.  '' 'dirichlet' '' sets p(k=0)=0.0, '' 'neumann' '' sets p(k=0)=p(k=1). '' 'neumann+inhomo' '' corresponds to an extended Neumann boundary condition where heat flux or temperature inhomogeneities near the surface (pt(k=1)) are additionally regarded (see Shen and LeClerc (1995, Q.J.R. Meteorol. Soc., 1209)). This condition is only permitted with the Prandtl-layer switched on ([#prandtl_layer prandtl_layer]), otherwise the run is terminated.\\\\
-Since at the bottom boundary of the model the vertical velocity disappears (w(k=0) = 0.0), the consistent Neumann condition ('' 'neumann' '' or '' 'neumann+inhomo' '') dp/dz = 0 should be used, which leaves the vertical component w unchanged when the pressure solver is applied. Simultaneous use of the Neumann boundary conditions both at the bottom and at the top boundary ([#bc_p_t bc_p_t]) usually yields no consistent solution for the perturbation pressure and should be avoided.
+Allowed values are '' 'dirichlet' '' and '' 'neumann' ''.  '' 'dirichlet' '' sets p(k=0)=0.0, '' 'neumann' '' sets p(k=0)=p(k=1).\\\\
+Since vertical velocity is zero at the rigid lower boundary (w(k=0) = 0.0), the consistent Neumann condition ('' 'neumann' '') dp/dz = 0 should be used, which leaves the vertical component w unchanged, when the pressure solver is applied. Simultaneous use of the Neumann boundary conditions both at the bottom and at the top boundary ([#bc_p_t bc_p_t]) is allowed.
 }}}
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