Runs with easy topography

A simulation of a single surface-mounted cube in neutral channel flow with constant bulk velocity is presented. Cyclic lateral boundary conditions are used. The 3d-model is initialized with constant vertical profiles. Coriolis force is switched off (omega = 0.0). A constant volume flow (i.e. constant bulk velocity) is maintained (conserve_volume_flow = .T.). The flow is explicitly set 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 (bc_uv_t = 'dirichlet_0'). The cube is constructed using the rasterized topography mode (topography = 'read_from_file') with the default topography_grid_convention = 'cell_center'. You can find the input files for the simulation in the trunk.

In a second example, the cube is constructed using the single building topography mode (topography = 'single_building') with the default topography_grid_convention = 'cell_edge'. The results of the two examples should be the same. The parameter file using the single building topography mode is attached to this page.