92 | | {{{#!td style="vertical-align:top; text-align:left;width: 150px" |
93 | | [=# ''''''] |
94 | | }}} |
95 | | {{{#!td style="vertical-align:top; text-align:left;style="width: 50px" |
96 | | |
97 | | }}} |
98 | | {{{#!td style="vertical-align:top; text-align:left;style="width: 100px" |
99 | | |
100 | | }}} |
101 | | {{{#!td |
102 | | |
103 | | }}} |
104 | | |---------------- |
105 | | {{{#!td style="vertical-align:top" |
106 | | [=#<insert_parameter_name> '''<insert_parameter_name>'''] |
107 | | }}} |
108 | | {{{#!td style="vertical-align:top" |
109 | | <insert type> |
110 | | }}} |
111 | | {{{#!td style="vertical-align:top" |
112 | | <insert value> |
113 | | }}} |
114 | | {{{#!td |
115 | | <insert explanation> |
| 91 | {{{#!td style="vertical-align:top;width: 150px" |
| 92 | [=#call_psolver_at_all_substeps '''call_psolver_at_all_substeps'''] |
| 93 | }}} |
| 94 | {{{#!td style="vertical-align:top;width: 50px" |
| 95 | L |
| 96 | }}} |
| 97 | {{{#!td style="vertical-align:top;width: 100px" |
| 98 | ''.T.'' |
| 99 | }}} |
| 100 | {{{#!td |
| 101 | Switch to steer the call of the pressure solver.\\\\ |
| 102 | In order to speed-up performance, the Poisson equation for perturbation pressure (see [#psolver psolver]) can be called only at the last substep of multistep Runge-Kutta timestep schemes (see [#timestep_scheme timestep_scheme]) by setting '''call_psolver_at_all_substeps''' = ''.F.''. In many cases, this sufficiently reduces the divergence of the velocity field. Nevertheless, small-scale ripples (2-delta-x) may occur. In this case and in case of non-cyclic lateral boundary conditions, '''call_psolver_at_all_timesteps''' = ''.T.'' should be used. |
| 103 | }}} |
| 104 | |---------------- |
| 105 | {{{#!td style="vertical-align:top" |
| 106 | [=#canopy_mode '''canopy_mode'''] |
| 107 | }}} |
| 108 | {{{#!td style="vertical-align:top" |
| 109 | C*20 |
| 110 | }}} |
| 111 | {{{#!td style="vertical-align:top" |
| 112 | 'block' |
| 113 | }}} |
| 114 | {{{#!td |
| 115 | Canopy mode.\\\\ |
| 116 | Besides using the default value, that will create a horizontally homogeneous plant canopy that extends over the total horizontal extension of the model domain, the user may add code to the user interface subroutine {{{user_init_plant_canopy}}} to allow further canopy modes.\\\\ |
| 117 | The setting of '''canopy_mode''' becomes only active, if [#plant_canopy plant_canopy] has been set ''.T.'' and a non-zero [#drag_coefficient drag_coefficient] has been defined. |