Changes between Version 404 and Version 405 of doc/app/initialization_parameters


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Timestamp:
Oct 4, 2018 4:40:23 PM (6 years ago)
Author:
kanani
Comment:

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  • doc/app/initialization_parameters

    v404 v405  
    18161816}}}
    18171817{{{#!td
    1818 Scalar flux at the surface (in kg m/s)).\\\\
     1818Scalar flux at the surface (in kg m^-2^ s^-1^ (particle flux) or ppm m s^-1^ (gaseous flux)).\\\\
    18191819If a non-zero value is assigned to this parameter, the respective scalar flux value is used as bottom (horizontally homogeneous) boundary condition for the scalar concentration equation. This additionally requires that a Neumann condition must be used for the scalar concentration (see [#bc_s_b bc_s_b]), because otherwise the resolved scale may contribute to the surface flux so that a constant value cannot be guaranteed. Also, changes of the surface scalar concentration (see [#s_surface_initial_change s_surface_initial_change]) are not allowed.\\\\
    18201820If no surface scalar flux is assigned ('''surface_scalarflux''' = ''0.0''), it is calculated at each time step by u,,*,, {{{*}}} s,,*,, (of course only with [#constant_flux_layer constant_flux_layer] switched on). Here, s,,*,, is calculated from Monin-Obukhov similarity theory assuming a logarithmic scalar concentration profile between k=0 and k=1. In this case, a Dirichlet condition (see bc_s_b) must be used as bottom boundary condition for the scalar concentration.
     
    19081908}}}
    19091909{{{#!td
    1910 Scalar flux at the top boundary (in kg m/s).\\\\
     1910Scalar flux at the top boundary (in kg m^-2^ s^-1^ (particle flux) or ppm m s^-1^ (gaseous flux)).\\\\
    19111911If a value is assigned to this parameter, the internal two-dimensional surface scalar flux field {{{sswst}}} is initialized with the value of '''top_scalarflux''' as the top (horizontally homogeneous) boundary condition for the scalar equation. This additionally requires that a Neumann condition must be used for the scalar (see [#bc_s_t bc_s_t]), because otherwise the resolved scale may contribute to the top flux so that a constant flux value cannot be guaranteed.\\\\
    19121912'''Note:'''\\
     
    25062506}}}
    25072507{{{#!td
    2508 Surface value of the passive scalar (in kg).\\\\
     2508Surface value of the passive scalar (in kg m^-3^ (particles) or ppm (gases)).\\\\
    25092509This parameter assigns the value of the passive scalar '''s''' at the surface (k=0). Starting from this value, the initial vertical scalar concentration profile is constructed with [#s_vertical_gradient s_vertical_gradient] and [#s_vertical_gradient_level s_vertical_gradient_level].
    25102510}}}
     
    25202520}}}
    25212521{{{#!td
    2522 Change in surface scalar concentration to be made at the beginning of the 3d run (in kg).\\\\
     2522Change in surface scalar concentration to be made at the beginning of the 3d run (in kg m^-3^ (particles) or ppm (gases)).\\\\
    25232523If '''s_surface_initial_change''' is set to a non-zero value, the near surface scalar flux is not allowed to be given simultaneously (see [#surface_scalarflux surface_scalarflux]).
    25242524}}}
     
    25342534}}}
    25352535{{{#!td
    2536 Scalar concentration gradient(s) of the initial scalar concentration profile (in kg / 100 m).\\\\
     2536Scalar concentration gradient(s) of the initial scalar concentration profile (in kg m^-3^ / 100 m (particles) or ppm / 100m (gases)).\\\\
    25372537The scalar gradient holds starting from the height level defined by [#s_vertical_gradient_level s_vertical_gradient_level] (precisely: for all uv levels k, where zu(k) > s_vertical_gradient_level, s_init(k) is set: s_init(k) = s_init(k-1) + dzu(k) * '''s_vertical_gradient''') up to the top boundary or up to the next height level defined by s_vertical_gradient_level. A total of 10 different gradients for 11 height intervals (10 intervals if s_vertical_gradient_level(1) = 0.0) can be assigned. The surface scalar value is assigned via [#s_surface s_surface].\\\\
    25382538'''Example:'''\\\\
    25392539      '''s_vertical_gradien'''t = ''0.1,'' ''0.05,''\\
    25402540      [#s_vertical_gradient_level s_vertical_gradient_level] = ''500.0,'' ''1000.0,''\\\\
    2541 That defines the scalar concentration to be constant with height up to z = 500.0 m with a value given by. For 500.0 m < z <= 1000.0 m the scalar gradient is 0.1 kg / 100 m and for z > 1000.0 m up to the top boundary it is 0.05 kg / 100 m (it is assumed that the assigned height levels correspond with uv levels).
     2541That defines the scalar concentration to be constant with height up to z = 500.0 m with a value given by. For 500.0 m < z <= 1000.0 m the scalar gradient is 0.1 kg m^-3^ / 100 m and for z > 1000.0 m up to the top boundary it is 0.05 kg m^-3^ / 100 m (it is assumed that the assigned height levels correspond with uv levels).
    25422542}}}
    25432543|----------------
     
    30573057}}}
    30583058{{{#!td
    3059 Prescribed scalar flux in kg m/s at the five topography faces:\\\\
     3059Prescribed scalar flux at the five topography faces (in kg m^-2^ s^-1^ (particle flux) or ppm m s^-1^ (gaseous flux)):\\\\
    30603060'''wall_scalarflux'''(0)    top face\\
    30613061'''wall_scalarflux'''(1)    left face\\