| 66 | | ||[=#PA0041 PA0041] ||plant_canopy = .TRUE. requires a non-zero drag coefficient, given value is canopy_drag_coeff = 0.0 || When simulating a plant canopy, a non-zero [../canpar#canopy_drag_coeff canopy_drag_coeff] must be set in the parameter file under NAMELIST {{{&plant_canopy_parameters}}}. The [/wiki/doc/app/canpar canopy model] in PALM adds an additional sink/source terms to the momentum equations, the prognostic equation for temperature, and the subgrid scale turbulent kinetic energy equation. In case of [../initialization_parameters#humidity humidity] = ''.TRUE.'' or [../initialization_parameters#passive_scalar passive_scalar] = ''.TRUE.'', an additional source/sink term is added to the prognostic equation of the respective scalar.\\ If [../canpar#canopy_drag_coeff canopy_drag_coeff] = 0.0, the additional terms equal zero and there would be no effect on the flow. || |
| | 66 | ||[=#PA0041 PA0041] ||plant_canopy = .TRUE. requires a non-zero drag coefficient, given value is canopy_drag_coeff = 0.0 || When simulating a plant canopy, a non-zero [../plant_canopy_parameters#canopy_drag_coeff canopy_drag_coeff] must be set in the parameter file under NAMELIST {{{&plant_canopy_parameters}}}. The [/wiki/doc/app/plant_canopy_parameters canopy model] in PALM adds an additional sink/source terms to the momentum equations, the prognostic equation for temperature, and the subgrid scale turbulent kinetic energy equation. In case of [../initialization_parameters#humidity humidity] = ''.TRUE.'' or [../initialization_parameters#passive_scalar passive_scalar] = ''.TRUE.'', an additional source/sink term is added to the prognostic equation of the respective scalar.\\ If [../plant_canopy_parameters#canopy_drag_coeff canopy_drag_coeff] = 0.0, the additional terms equal zero and there would be no effect on the flow. || |
| 143 | | ||[=#PA0118 PA0118] ||using the beta function for the construction of the leaf area density profile requires both alpha_lad and beta_lad to be /= 9999999.9 ||If the lad (leaf area density) profile of a vegetation canopy is to be constructed using a beta distribution, parameters [/wiki/doc/app/canpar#alpha_lad alpha_lad], [/wiki/doc/app/canpar#beta_lad beta_lad] must be set and [/wiki/doc/app/canpar#lai_beta lai_beta] must be given a non-zero value. || |
| 144 | | ||[=#PA0119 PA0119] ||using the beta function for the construction of the leaf area density profile requires a non-zero lai_beta, but given value is lai_beta = 0.0 ||If the lad (leaf area density) profile of a vegetation canopy is to be constructed using a beta distribution, parameters [/wiki/doc/app/canpar#alpha_lad alpha_lad], [/wiki/doc/app/canpar#beta_lad beta_lad] must be set and [/wiki/doc/app/canpar#lai_beta lai_beta] must be given a non-zero value. || |
| 145 | | ||[=#PA0120 PA0120] ||simultaneous setting of alpha_lad /= 9999999.9 combined with beta_lad /= 9999999.9 and lad_surface /= 0.0 is not possible, use either vertical gradients or the beta function for the construction of the leaf area density profile ||The lad (leaf area density) profile of a vegetation canopy can be either constructed with a beta function by prescribing parameters [/wiki/doc/app/canpar#alpha_lad alpha_lad], [/wiki/doc/app/canpar#beta_lad beta_lad] and [/wiki/doc/app/canpar#lai_beta lai_beta]; or from piecewise linear segments by prescribing [/wiki/doc/app/canpar#lad_surface lad_surface], [/wiki/doc/app/canpar#lad_vertical_gradient lad_vertical_gradient] and [/wiki/doc/app/canpar#lad_vertical_gradient_level lad_vertical_gradient_level]. || |
| | 143 | ||[=#PA0118 PA0118] ||using the beta function for the construction of the leaf area density profile requires both alpha_lad and beta_lad to be /= 9999999.9 ||If the lad (leaf area density) profile of a vegetation canopy is to be constructed using a beta distribution, parameters [/wiki/doc/app/plant_canopy_parameters#alpha_lad alpha_lad], [/wiki/doc/app/plant_canopy_parameters#beta_lad beta_lad] must be set and [/wiki/doc/app/plant_canopy_parameters#lai_beta lai_beta] must be given a non-zero value. || |
| | 144 | ||[=#PA0119 PA0119] ||using the beta function for the construction of the leaf area density profile requires a non-zero lai_beta, but given value is lai_beta = 0.0 ||If the lad (leaf area density) profile of a vegetation canopy is to be constructed using a beta distribution, parameters [/wiki/doc/app/plant_canopy_parameters#alpha_lad alpha_lad], [/wiki/doc/app/plant_canopy_parameters#beta_lad beta_lad] must be set and [/wiki/doc/app/plant_canopy_parameters#lai_beta lai_beta] must be given a non-zero value. || |
| | 145 | ||[=#PA0120 PA0120] ||simultaneous setting of alpha_lad /= 9999999.9 combined with beta_lad /= 9999999.9 and lad_surface /= 0.0 is not possible, use either vertical gradients or the beta function for the construction of the leaf area density profile ||The lad (leaf area density) profile of a vegetation canopy can be either constructed with a beta function by prescribing parameters [/wiki/doc/app/plant_canopy_parameters#alpha_lad alpha_lad], [/wiki/doc/app/plant_canopy_parameters#beta_lad beta_lad] and [/wiki/doc/app/plant_canopy_parameters#lai_beta lai_beta]; or from piecewise linear segments by prescribing [/wiki/doc/app/plant_canopy_parameters#lad_surface lad_surface], [/wiki/doc/app/plant_canopy_parameters#lad_vertical_gradient lad_vertical_gradient] and [/wiki/doc/app/plant_canopy_parameters#lad_vertical_gradient_level lad_vertical_gradient_level]. || |
