Two-Scale Modeling Approach to Predict Permeability of Fibrous Media
We previously demonstrated how one can develop a 3-D geometry to model the fibrous microstructure of a nonwoven fiberweb and use it to simulate its permeability at fiber level [1-6]. Developing 3-D models of most nonwoven fabrics (bonded fiberwebs), however, is cumbersome, as in the case of hydroent...
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doaj-835c0b8910fc43e0a5089560ca7e3cca2020-11-25T03:24:25ZengSAGE PublishingJournal of Engineered Fibers and Fabrics1558-92502008-06-0132-Filtration1318Two-Scale Modeling Approach to Predict Permeability of Fibrous MediaSudhakar JaganathanBehnam Pourdeyhimi, Ph.D.Hooman V. Tafreshi, Ph.D.We previously demonstrated how one can develop a 3-D geometry to model the fibrous microstructure of a nonwoven fiberweb and use it to simulate its permeability at fiber level [1-6]. Developing 3-D models of most nonwoven fabrics (bonded fiberwebs), however, is cumbersome, as in the case of hydroentangled fabrics, for instance. In such cases, microscopic techniques are often used to generate 3-D images of the media’s microstructures. Nevertheless, whether the microstructure is modeled or obtained from 3-D imaging, extensive computational resources are required to use them in fluid flow simulations [7]. To circumvent this problem, a two-scale modeling approach is proposed here that allows us to simulate the entire thickness of a commercial fabric/filter on a personal computer. In particular, the microscale permeability of a hydroentangled nonwoven is computed using 3-D reconstructed microstructures obtained from Digital Volumetric Imaging (DVI). The resulting microstructural permeability tensors are then used in a macroscale porous model to simulate the flow through the material’s thickness and the calculation of its overall permeability.http://www.jeffjournal.org/papers/Volume3/Jaganathan.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sudhakar Jaganathan Behnam Pourdeyhimi, Ph.D. Hooman V. Tafreshi, Ph.D. |
spellingShingle |
Sudhakar Jaganathan Behnam Pourdeyhimi, Ph.D. Hooman V. Tafreshi, Ph.D. Two-Scale Modeling Approach to Predict Permeability of Fibrous Media Journal of Engineered Fibers and Fabrics |
author_facet |
Sudhakar Jaganathan Behnam Pourdeyhimi, Ph.D. Hooman V. Tafreshi, Ph.D. |
author_sort |
Sudhakar Jaganathan |
title |
Two-Scale Modeling Approach to Predict Permeability of Fibrous Media |
title_short |
Two-Scale Modeling Approach to Predict Permeability of Fibrous Media |
title_full |
Two-Scale Modeling Approach to Predict Permeability of Fibrous Media |
title_fullStr |
Two-Scale Modeling Approach to Predict Permeability of Fibrous Media |
title_full_unstemmed |
Two-Scale Modeling Approach to Predict Permeability of Fibrous Media |
title_sort |
two-scale modeling approach to predict permeability of fibrous media |
publisher |
SAGE Publishing |
series |
Journal of Engineered Fibers and Fabrics |
issn |
1558-9250 |
publishDate |
2008-06-01 |
description |
We previously demonstrated how one can develop a 3-D geometry to model the fibrous microstructure of a nonwoven fiberweb and use it to simulate its permeability at fiber level [1-6]. Developing 3-D models of most nonwoven fabrics (bonded fiberwebs), however, is cumbersome, as in the case of hydroentangled fabrics, for instance. In such cases, microscopic techniques are often used to generate 3-D images of the media’s microstructures. Nevertheless, whether the microstructure is modeled or obtained from 3-D imaging, extensive computational resources are required to use them in fluid flow simulations [7]. To circumvent this problem, a two-scale modeling approach is proposed here that allows us to simulate the entire thickness of a commercial fabric/filter on a personal computer. In particular, the microscale permeability of a hydroentangled nonwoven is computed using 3-D reconstructed microstructures obtained from Digital Volumetric Imaging (DVI). The resulting microstructural permeability tensors are then used in a macroscale porous model to simulate the flow through the material’s thickness and the calculation of its overall permeability. |
url |
http://www.jeffjournal.org/papers/Volume3/Jaganathan.pdf |
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