Spatially changing external forces
I'm learning DualSPHysics to test it on sea ice simulation. Basically I want a 2D simulation on particles using a suitable rheology, forced by surface winds. The wind forcing is spatially and temporally variable, preferably provided as a 3D (x, y, time) mesh of drag vectors.
I am now quite familiar with the ExternalForces example, but there the external forces are spatially uniform. It is said in the documentation, that the capability for spatially and temporally varying external forces has existed since version 3.0, but I can't seem to find any information on how (except for the very limited case of angular forces that arguably vary in a spatial sense).
Is it possible to specify arbitrary spatially varying forces, and how?
Thank you in advance,
-Jonni Lehtiranta, Operationan Oceanography group, Finnish Meteorological Institute