Detailed investigations of single-phase flows with mass and heat transfer in tubular fixed bed reactors of low aspect ratios

Computational Fluid Dynamics

Universität Erlangen-Nürnberg
Lehrstuhl für Strömungsmechanik

During the past few years, medical people have slowly become interested in numerical simulation techniques. As a new application within the LBA-Diff project, the flow in weak (porous) bones will be investigated to support osteoporosis treatment.As the population ages and life expectancy increases, osteoporosis is expected to escalate. Already almost one in four people over the age of 60 in the industrial countries is afflicted by osteoporosis, a disease where the bones become weak. Fractures are the most common complication linked to this degenerative disease. Unfortunately, however, there is no effective treatment for most of these fractures yet.During the last few years of LBA-Diff and complementary projects, a complete tool chain has been developed to investigate the flow in porous media, in particular packings of spheres. The experimental techniques (CT or NMR/MRI imaging) and the numerical methods (using data from 3-D imaging as input for CFD simulations, lattice Boltzmann flow solver, analysis of detailed information on the pore-scale level) can directly be transferred to this new application area. Preliminary studies confirmed that the lattice Boltzmann approach saves a lot of time compared to e.g. finite element simulations.In the long run, it is planned to include the non-Newtonian behavior of the fluid. However, currently it is not yet known how to model the concrete-like material correctly.