Changes between Version 91 and Version 92 of doc/app/initialization_parameters

Timestamp:

Sep 15, 2010 11:42:02 AM (15 years ago)

Author:

kanani

Comment:

--

doc/app/initialization_parameters

@@ -950 +950 @@
 |----------------
 {{{#!td style="vertical-align:top"
+[=#residual_limit '''residual_limit''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+1.0E-6
+}}}
+{{{#!td
+Largest residual permitted for the multi-grid scheme (in s^-2^m^-3^).\\\\
+This is a parameter to steer the accuracy of the multi-grid scheme (see [#psolver psolver]). The assigned cycle (v- or w-cycle, see [#mg_cycles mg_cycles]) is passed through until the residual falls below the limit given by '''residual_limit'''. If this is not the case after 1000 cycles, the PALM aborts with a corresponding error message.\\\\
+The reciprocal value of this parameter can be interpreted as a factor by the divergence of the provisional velocity field is approximately reduced after the multi-grid scheme has been applied (thus the default value causes a reduction of the divergence by approx. 6 orders of magnitude).  
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#<insert_parameter_name> '''<insert_parameter_name>''']
+}}}
+{{{#!td style="vertical-align:top"
+<insert type>
+}}}
+{{{#!td style="vertical-align:top"
+<insert value>
+}}}
+{{{#!td
+<insert explanation>
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#<insert_parameter_name> '''<insert_parameter_name>''']
+}}}
+{{{#!td style="vertical-align:top"
+<insert type>
+}}}
+{{{#!td style="vertical-align:top"
+<insert value>
+}}}
+{{{#!td
+<insert explanation>
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#<insert_parameter_name> '''<insert_parameter_name>''']
+}}}
+{{{#!td style="vertical-align:top"
+<insert type>
+}}}
+{{{#!td style="vertical-align:top"
+<insert value>
+}}}
+{{{#!td
+<insert explanation>
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#<insert_parameter_name> '''<insert_parameter_name>''']
+}}}
+{{{#!td style="vertical-align:top"
+<insert type>
+}}}
+{{{#!td style="vertical-align:top"
+<insert value>
+}}}
+{{{#!td
+<insert explanation>
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
 [=#<insert_parameter_name> '''<insert_parameter_name>''']
 }}}
@@ -1371 +1438 @@
 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].
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#recycling_width '''recycling_width''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+0.1 * [#nx nx] * [#dx dx]
+}}}
+{{{#!td
+Distance of the recycling plane from the inflow boundary (in m).\\\\
+This parameter sets the horizontal extension (along the direction of the main flow) of the so-called recycling domain which is used to generate a turbulent inflow (see [#turbulent_inflow turbulent_inflow]). '''recycling_width''' must be larger than the grid spacing ([#dx dx]) and smaller than the length of the total domain ([#nx nx] * dx).
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#rif_max '''rif_max''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+1.0
+}}}
+{{{#!td
+Upper limit of the flux-Richardson number.\\\\
+With the Prandtl layer switched on (see [#prandtl_layer prandtl_layer]]), flux-Richardson numbers ('''rif''') are calculated for z=zp (k=1) in the 3d-model (in the [[1d-model]] for all heights). Their values in particular determine the values of the friction velocity (1d- and 3d-model) and the values of the eddy diffusivity (1d-model). With small wind velocities at the Prandtl layer top or small vertical wind shears in the 1d-model, '''rif''' can take up unrealistic large values. They are limited by an upper ('''rif_max''') and lower limit (see [#rif_min rif_min]) for the flux-Richardson number. The condition '''rif_max''' > rif_min must be met.
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#rif_min '''rif_min''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+-5.0
+}}}
+{{{#!td
+Lower limit of the flux-Richardson number.\\\\
+For further explanations see [#rif_max rif_max]. The condition rif_max > '''rif_min''' must be met.
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#roughness_length '''roughness_length''']
+}}}
+{{{#!td style="vertical-align:top"
+R
+}}}
+{{{#!td style="vertical-align:top"
+0.1
+}}}
+{{{#!td
+Roughness length (in m).\\\\
+This parameter is effective only in case that a Prandtl layer is switched on (see [#prandtl_layer prandtl_layer]).
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#<insert_parameter_name> '''<insert_parameter_name>''']
+}}}
+{{{#!td style="vertical-align:top"
+<insert type>
+}}}
+{{{#!td style="vertical-align:top"
+<insert value>
+}}}
+{{{#!td
+<insert explanation>
 }}}
 |----------------