The topography you see is a digital terrain model, which was imported as a point-cloud
in geodata-wb, then converted to mesh and shape. The shape was used to slice the
transparent cube. The upper part of the cube (with the terrain profile at the bottom)
is the simulation domain. Cube length approx 300 m. The goal: simulate an avalanche
going down the hill.
When adressing the boundary conditions (for instance "wall no-slip") I explicitly must click
on every single triangle in the boundary dialog. And there are more than 5000 faces! Even if there would
be a possibility to select the faces with an other method, lets say with a rectangular window,
there would be thousands of entrances in the dictionaries. Is that possible? What do you think?
there is a diskussion about that in german forum: