A multi-scale study of the permeability of compressed nonwoven filter media

M. Kabel, R. Kirsch, S. Rief*, S. Staub, Fraunhofer Institute for Industrial Mathematics (ITWM), Germany

The deformation of filter media and its impact on their flow and filtration properties has become an aspect of increasing importance when predicting filter efficiency and lifetime. While the deformation of the media due to the flow during operation was the subject of many experimental and simulation studies, only a few works addressed the effects caused by deformations of nonwoven filter materials due to manufacturing.

In particular, the change of material properties due to compression was the object of research. Media compression occurs during calendering), combination of media with supporting or spacer meshes (see [3]) and pleating (see [4]). In each of these scenarios, it turned out that taking into account the changes in the material volume fraction of the nonwoven is essential for an appropriate computer-aided prediction of flow and filtration.

The present contribution is devoted to the investigation of the permeability of compressed nonwoven filter media, similar to a previous work that was motivated by a better understanding of flow-induced material compression (see [2]). A filter material used in oil filtration was chosen for the investigation...

Session: F10 - Numerical Analysis of Filter Media Pore Size and Structure
Day: 24 October 2019
Time: 10:45 - 12:00 h

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