Toward Predicting Filtration and Separation: Progress & Challenges
Andreas Wiegmann, Stefan Rief, Arnulf Latz and Oleg Iliev
FRAUNHOFER ITWM KAISERSLAUTERN
The need for correctly predicting filtration and separation processes is greater than ever.
New legislation, new materials, globalization and short development cycles require deeper
understanding than before. Computer Simulations are a recent and efficient way to gain
knowledge regarding filtration. But modeling and simulation efforts face serious difficulties
in their quest to complement experiment / observation and theory. Filtration is a phenomenon
determined by multiple scales. They range from the flow regime around a moving vehicle to
the atomic regime of adhesion forces between dust particles and an electrically charged filter
medium. Fortunately, powerful computers, sophisticated models and new experimental
equipment are available. Desktop computers with lots of memory and several fast CPUs,
three-dimensional filter media models combined with SEM and µCT images are some of the
exciting developments that allow work today that was unthinkable in the past. We present
examples how filter media models, filter process models, CFD and statistics can provide
insights into filtration from the practical and the academic point of view.