Effect of Aperture Structure of Dutch Weave Mesh on Flow Resistivity

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  • Yoshida Yuichi
    Technical Section, Kansai Wire Netting Co., Ltd. Department of Chemical Engineering and Materials Science, Faculty of Science and Engineering, Doshisha University
  • Inoue Yohei
    Department of Mechanical Engineering and Intelligent Systems, Faculty of Informatics and Engineering, The University of Electro-Communications
  • Shimosaka Atsuko
    Department of Chemical Engineering and Materials Science, Faculty of Science and Engineering, Doshisha University
  • Shirakawa Yoshiyuki
    Department of Chemical Engineering and Materials Science, Faculty of Science and Engineering, Doshisha University
  • Hidaka Jusuke
    Department of Chemical Engineering and Materials Science, Faculty of Science and Engineering, Doshisha University

書誌事項

公開日
2015
DOI
  • 10.1252/jcej.14we168
公開者
公益社団法人 化学工学会

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説明

Plain Dutch weave and twilled Dutch weave meshes are superior filter media in terms of their high mechanical strength and tiny apertures. However, because they have high flow resistivity due to their complex flow paths, it is crucial to predict the pressure drop with high accuracy for a filtration process. We, therefore, investigated the effect of the aperture structure of a Dutch weave mesh on the flow resistivity. First, we proposed a calculation model for estimating the aperture size of a twilled Dutch weave mesh to thoroughly understand the aperture structure; whereas, the aperture structure of a plain Dutch weave mesh has already been clarified. Next, numerical simulations were performed using a combination of the lattice Boltzmann and immersed boundary methods. It was found that the drag force of the Dutch weave mesh increased at the inside aperture where the volume fraction increased, and in the twilled Dutch weave mesh, the drag force at the center also varied with the local torsion of the flow path. Based on these findings, we derived an equation for estimating the pressure drop across the Dutch weave mesh, and experimentally verified its validity. This enables a rational and highly accurate prediction of the pressure drop.

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