The Impacts of Surface Microchannels on the Transport Properties of Porous Fibrous Media Using Stochastic Pore Network Modeling

Materials

Wei Zhou¹  Xiang Huang²  Kaiyong Jiang²  Bin Liu²  Daxiang Deng³ 

[1] Department of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China;Fujian Key Laboratory of Special Energy Manufacturing, Xiamen Key Laboratory of Digital Vision Measurement, Department of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China;School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China;

关键词: random pore network modeling;    tailored structure;    transport property;   

DOI  :  10.3390/ma14247546

来源: DOAJ

【 摘 要 】

A stochastic pore network modeling method with tailored structures is proposed to investigate the impacts of surface microchannels on the transport properties of porous fibrous media. Firstly, we simplify the original pore network extracted from the 3D images. Secondly, a repeat sampling strategy is applied during the stochastic modeling of the porous structure at the macroscale while honoring the structural property of the original network. Thirdly, the microchannel is added as a spherical chain and replaces the overlapped elements of the original network. Finally, we verify our model via a comparison of the structure and flow properties. The results show that the microchannel increases the permeability of flow both in the directions parallel and vertical to the microchannel direction. The microchannel plays as the highway for the pass of reactants while the rest of the smaller pore size provides higher resistance for better catalyst support, and the propagation path in the network with microchannels is more even and predictable. This work indicates that our modeling framework is a promising methodology for the design optimization of cross-scale porous structures.

【 授权许可】

Unknown