Non-physical behaviour - Solid Particle in Fluid
I am currently creating a simulation in which a basin is filled with a fluid containing a particle (density higher than fluid density). During the filling process, a gap (see illustration before and after) is formed between the fluid and the particles when the fluid with particles hits the fluid, which is already in the basin. Furthermore, the particle does not sink but rises, which may not be physically correct. Do you know what other parameters I could vary here to solve this problem. So far I have only tried the coef of sound.
Info: At a later time I would like to have the upper fluid filled through a tube. I work with freecad with implemented sph macro.
I hope you can help me with my problem. Thank you very much!