图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
多孔介质期刊
影响因子: 1.49 5年影响因子: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v14.i9.40
pages 791-804

MODELING TORTUOSITY IN THIN FIBROUS POROUS MEDIA USING COMPUTATIONAL FLUID DYNAMICS

Rahul Vallabh
North Carolina State University
Joel Ducoste
Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA
Abdel-Fattah Seyam
Collge of Textiles, North Carolina State University, Raleigh, North Carolina 27695, USA
Pamela Banks-Lee
Collge of Textiles, North Carolina State University, Raleigh, North Carolina 27695, USA

ABSTRACT

Eulerian and Lagrangian computational models to predict tortuosity of fibrous porous media were developed using computational fluid dynamics (CFD). The first computation model involved an intermediate step in which air permeability of fibrous porous media was simulated using CFD. Three-dimensional geometries used in these models were generated in ANSYS to simulate fibrous porous microstructure. The proposed computational models were found to be in good agreement with numerical models available in the literature when predicting the relationship between tortuosity and porosity of fibrous media. The proposed models also showed that transverse flow through a fibrous porous media becomes less tortuous with increasing porosity, with the tortuosity value approaching 1 at the upper limits of porosity. While other models found in the literature have expressed tortuosity as a function of porosity only, the proposed computational models show that in addition to the porosity other structural parameters such as fiber diameter and fiberweb thickness have a significant influence on tortuosity. Within the range of small fiberweb thickness, tortuosity was found to asymptotically increase with increasing fiberweb thickness.


Articles with similar content:

EXPERIMENTAL AND COMPUTATIONAL CALCULATION OF LONGITUDINAL SPECIFIC AIR PERMEABILITY IN POPULUS DELTOIDES AND POPULUS EUROAMERICANA WOOD
Journal of Porous Media, Vol.19, 2016, issue 11
Alireza Rahbari, Hamid Reza Taghiyari, Javad Kadkhodapour, Sajad Homayoonfar
SEEPAGE HEAT TRANSFER BETWEEN CLINKER AND COOLING AIR WITH VARIABLE PROPERTIES OF THE GRATE COOLER
Heat Transfer Research, Vol.48, 2017, issue 3
Meiqi Wang, Haoran Liu, Bin Liu, Yan Wen
A REDUCED COMPUTATIONAL MODEL FOR PREDICTION OF ELECTRICAL RESISTANCE IN FIBROUS COMPOSITES
International Journal for Multiscale Computational Engineering, Vol.12, 2014, issue 5
Xiaobo Guo, Maciej S. Kumosa, Yun-Bo Yi
FRACTAL ANALYSIS OF PORE STRUCTURES IN LOW PERMEABILITY SANDSTONES USING MERCURY INTRUSION POROSIMETRY
Journal of Porous Media, Vol.21, 2018, issue 11
Congle Wang, Zhichao Liu, Fuyong Wang, Jian Gao, Xiqun Tan, Liang Jiao
NUMERIC STUDY OF SURFACE ROUGHNESS IN FLAT MICROCHANNEL HEAT SINK
International Heat Transfer Conference 16, Vol.10, 2018, issue
Liang Gong, Hui Lu, Minghai Xu