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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BUJ8-0003-0003

Czasopismo

Journal of KONES

Tytuł artykułu

Filtration performance simulations based on 3D structural data of real filter media

Autorzy Lehmann, M. J.  Hiel, S.  Nibler, E.  Durst, M. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN The performance of a particle filter is primarily determined by its media. Today's filter media is a composition of different layers known as MULTIGRADE or MICROGRADE media. Selecting the right combination of layers requires a lot of experience. Recent progress now enables the simulation of complex structures to support the development by adding information about the media utilization. However, published results point out that the local inhomogeneity of the fiber structure plays an important role. Thus computer models have been developed to reproduce 3D fiber structures. However, these 3D fiber structures are still simplified models, as they have just a few input parameters and do not account for the production process. But state-of-the-art simulation software, such as GeoDict, provides the opportunity to import 3D images of real fiber structures as initial geometry. Micro-tomography now promises to deliver this quantitative data about the real 3D fibrous structure. In this paper first results are presented, indicating that we extracted the true fibrous structure of a synthetic media by segmentation of the raw XCT data with the software MAVI. In contrast to other publications, the packing density of the media was not used as fitting factor, but obtained without a priori knowledge. The results discussed show a reasonably good agreement with measured data for packing density, fiber diameter distribution, initial pressure drop and initial efficiency. However, it is crucial to select a region of interest large enough to be representative.
Słowa kluczowe
EN filtration   filter media   XCT   simulation   fibrous structure  
Wydawca Institute of Aviation
Czasopismo Journal of KONES
Rocznik 2008
Tom Vol. 15, No. 3
Strony 277--284
Opis fizyczny Bibliogr. 16 poz., rys.
Twórcy
autor Lehmann, M. J.
autor Hiel, S.
autor Nibler, E.
autor Durst, M.
Bibliografia
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[2] Schweers, E. Löffler, F, Realistic modeling of the behaviour of fibrous filters through consideration of filter structure, Powder Technology, Vol. 80, Nr 3, pp. 191-206, 1994.
[3] Wiegman, A., Latz, A., Rief, S., Virtual material design and air filtration simulation techniques inside GeoDict and FilterDict, In Proceeding: Annual Conference of American Fitration and Separations Society, Atlanta, 2005.
[4] Schladitz, K., Peters, S., Reinel-Bitzer, D., Wiegman, A., Ohser, J., Design of acoustic trim based on geometric modeling and flow simulation for non-woven, Computational Materials Science, Vol. 38, pp. 56-66, 2006.
[5] Thibault, X., Cloetens, P., Bloch, J. F., Peyrin, F., Non-woven characterization using X-raysynchroton radition micro-tomography, Proceeding: 9th World Filtration Congress (American Filtration and Separations Society), CD-ROM, New Orleans, 2004.
[6] Lehmann, M. J., Hardy, E. H., Meyer, J., Kasper, G., MRI as a key tool for understanding and modeling the filtration kinetics of fibrous media, Magnetic Resonance Imaging, Vol. 23, Nr 2, pp. 341-342, 2005.
[7] Hoferer, J., Lehmann, M. J., Hardy, E. H., Meyer, J., Kasper, G., Highly resolved determination of structure and particle deposition in fibrous filters by MRI, Chemical Engineering Technology, Vol. 29, Nr 7, pp. 816-819, 2006.
[8] Lehmann, M. J., Untersuchungen zur Struktur und zur Beladungskinetik von Tiefenfiltern, Disseration University Karlsruhe, Institute MVM, Universitätsverlag Karlsruhe, digibib.ubka.uni-karlsruhe.de/volltexte/1000003485
[9] Jagnanthan, S., Tafreshi, H. V., Pourdeyhimi, B., A realistic approach for modelling permeability of fibrous media: 3-D imaging coupled with CFD simulation, Chemical Engineering Science, Vol. 63, pp. 244-252, 2008.
[10] www.itwm.fhg.de/bv/projects/MAVI/index_en.php
[11] www.geodict.com
[12] Wiegmann, A., Computation of the permeability of porous materials from their microstructure by FFF Stokes, In: Berichte des Fraunhofer ITWM, Nr 129, 2007.
[13] Kehrwald, D., Parallel lattice Boltzmann simulation of complex flows, Proceedings NAFEMS seminar Die Simulation komplexer Strömungsvorgänge (CFD), Nieerhausen bei Wiesbaden, 2004.
[14] Banzhaf, H., Analytische, numerisch und experimentelle Untersuchungen zur Abscheidung von Partikeln aus Ölen mit Hilfe fasriger Tiefenfiltermedien, Dissertation University Stuttgart Institute IMVT, Shaker Verlag ISBN 3-8322-2335-4, 2004.
[15] Lehmann, M. J., Banzhaf, H., Klein, G. M., Durst, M., Setting a new Milestone in Filter Media Design: Simulating Performance according To Multi Pass Test based on 3D Fiber ,Structures, In: Proceeding 10th World Filtration Congress, pp. II-XXX, Leipzig, 2008.
[16] Lehmann, M. J., Hardy, E. H., Meyer, J., Kasper, G., Fibrous filters: non-invasive determination of local 3D fiber structure by MRI, Proceeding: 9th World Filtration Congress (American Filtration and Separations Society), CD-ROM, New Orleans, 2004.
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