Setting a new milestone in filter media design:
Simulating performance according to multi pass
test beased on 3D fiber structures

The performance of filter media for automotive oil filtration is determined 
according to the Multi Pass test procedure ISO 4548-12. Simulating the Multi 
Pass test has been an elusive challenge in the past, due to the lack of 
appropriate models for the loading kinetics of the entire media. For years, 
simulation of loading single fiber structures is promising to solve the issue 
by detailed build-up of particulate structures. Recent progress in the software 
development of GeoDict/FilterDict and the implementation of MANN+HUMMEL's 
filtration knowledge have led to successful simulations of the performance of 
a virtual media according to the Multi Pass test. The results closely 
correspond to measured data on the test rig. Thus, the former elusive 
goal has been reached and a new milestone in virtual filter media design 
has been set.