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Simulating transport in and entrainment form nonwoven fibrous, knitted, and opne-cell foam filters

Golkarfard, V.; Mullins, B.; King, A.; Abishek, S.; Kasper, G.; Heikamp, W.


The movement and re-entrainment of liquid droplets from three different filter media, namely fibrous, knitted, and open-cell foam was investigated numerically using computational fluid dynamics (CFD). A range of face velocities were considered which resulted in a range of oil transform rates and steady state saturation levels. It will be shown that liquid volume fraction in filters depends on velocity and time. The minimum velocity required for detachment of droplets was also identified. The main purpose of this research is to investigate the behaviour of pre saturated oil-mist filters in different geometric configuration and also different air flow conditions. In this study, all the produced filter geometries have a packing density (solidity) of 2 % with fiber/element diameter of 9 μm and overall dimensions of: 2mm (z), 0.5 mm (x), and 0.5 mm (y). In order to capture the gas-liquid interface, the Volume of Fluid (VOF) method will be applied. To perform the simulations, the open source computational fluid dynamics (CFD) toolbox, OpenFOAM is used. To verify the accuracy of computations, the calculation of clean pressure drop is compared against well-established pressure approximation in the literature. ... mehr

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DOI: 10.5445/IR/1000063420
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2016
Sprache Englisch
Identifikator urn:nbn:de:swb:90-634204
KITopen-ID: 1000063420
Erschienen in Filtech 2016, 11. - 13. Oktober, Köln [G5 - Mist and Droplet Separation II]
Schlagwörter Computation Fluid Dynamics, Nonwoven Filter Media, Fibrous Filter, Mist Filtration, Drop Re-entrainment, Oleophobic, Foam Filter
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