Practical Course SC & V Free Boundary Value Problems Dr. Miriam Mehl Institut für Informatik Scientific Computing in Computer Science

Examples

Domain Representation imaginary fluid particles fluid cell: #particles 1 empty cell: #particles = 0 obstacle cell

Domain Representation

Domain Implementation particles Particle_Lines cell types 3 possibilities each update for each time step!!! celleastwestnorthsouth

Algorithmic Changes extended initialization time loop: –update cell types –set u,v,p at the free boundary –perform computations inside the fluid –set u,v at the free boundary –update particle positions

Boundary Values edges between fluid and empty cells edges adjacent to fluid cells pressure in surface cells

Boundary Conditions equlibrium: surface tension surface stress neglection of surface tension zero stress components