Grids and solvers for the free-flow regime in the context of coupling free flow with porous-media flow

There is a broad variety of technical, environmental and medical systems, in which the coupling between free flow and flow through a porous medium plays a crucial role. While the highly nonlinear multiphase processes in the prorous-medium domain have less requirements on the temporal and spacial resolution, the nonlinear turbulent processes in the free-flow domain tend to have more. The complicated flow patterns that emerge e.g. in the case of interfaces with surface topology, require a high spatial resolution locally. This is the main focus of the research project. The fast turbulent processes require a high temporal resolution. Multi-rate time stepping can be realized by a domain decomposition approach. Within a doamain decomposition framework, the Navier-Stokes equations can be solved in a decoupled way. The latter is another issue dealt with in this project.

Prof. Dr.-Ing. Rainer Helmig

Melanie Lipp (M.Sc.)

LH2