3 | | The {{{first example}}} on this page shows a simulation of a single surface-mounted cube in neutral channel flow with constant bulk velocity. A constant bulk velocity means that the volume flow at the inflow boundary equals at each time step the volume flow at the outflow. For volume flow conservation, the initial profiles are used. Besides, cyclic lateral boundary conditions are used. The 3d-model is initialized with constant vertical profiles. Coriolis force is switched off ([../../inipar#omega omega] = 0.0). A constant volume flow (i.e. constant bulk velocity) is maintained ([../../inipar#conserve_volume_flow conserve_volume_flow] = .T.). The flow is explicitly set neutral ([../../inipar#neutral neutral] = .T.), i.e. the prognostic equation for temperature and other buoyancy terms must not be calculated, which saves computation time. To set the channel flow boundary condition, the horizontal velocity components at the domain top are kept zero ([../../inipar#bc_uv_t bc_uv_t] = 'dirichlet_0'). |
4 | | The cube is constructed using the rasterized topography mode ([../../inipar#topography topography] = 'read_from_file') with the default [../../inipar#topography_grid_convention topography_grid_convention] = 'cell_center'. You can find the input files for the simulation in the [source:palm/trunk/TESTS/cases/topo_from_ASCII_file/INPUT/ trunk]. |
| 3 | The {{{first example}}} on this page shows a simulation of a single surface-mounted cube in neutral channel flow with constant bulk velocity. A constant bulk velocity means that the volume flow at the inflow boundary equals at each time step the volume flow at the outflow. For volume flow conservation, the initial profiles are used. Besides, cyclic lateral boundary conditions are used. The 3d-model is initialized with constant vertical profiles. Coriolis force is switched off ([../../initialization_parameters#omega omega] = 0.0). A constant volume flow (i.e. constant bulk velocity) is maintained ([../../initialization_parameters#conserve_volume_flow conserve_volume_flow] = .T.). The flow is explicitly set neutral ([../../initialization_parameters#neutral neutral] = .T.), i.e. the prognostic equation for temperature and other buoyancy terms must not be calculated, which saves computation time. To set the channel flow boundary condition, the horizontal velocity components at the domain top are kept zero ([../../initialization_parameters#bc_uv_t bc_uv_t] = 'dirichlet_0'). |
| 4 | The cube is constructed using the rasterized topography mode ([../../initialization_parameters#topography topography] = 'read_from_file') with the default [../../initialization_parameters#topography_grid_convention topography_grid_convention] = 'cell_center'. You can find the input files for the simulation in the [source:palm/trunk/TESTS/cases/topo_from_ASCII_file/INPUT/ trunk]. |