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首页> 外文期刊>International Journal of Heat and Mass Transfer >Fluid flow and heat transfer of cross flow hollow fiber membrane contactors with randomly distributed fibers: A topological study
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Fluid flow and heat transfer of cross flow hollow fiber membrane contactors with randomly distributed fibers: A topological study

机译：具有随机分布纤维的错流中空纤维膜接触器的流体流动和传热：拓扑研究

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摘要

Fluid flow and heat transfer in novel cross flow hollow fiber membrane contactors are studied. The fiber banks are randomly potted in contactor shells and their distribution topology varies from case to case. The packing densities and the inlet flow Reynolds numbers are from 0.35 to 0.5 and 20 to 180, respectively. It is found that the pressure drops and heat transfer coefficients of the contactors are correlated to the topological characteristics of the void spaces among the fibers. Especially, the topological features of the large cavities among the fibers show dominant effect. Two typical large cavities are identified, namely isolated cavities and cut-through cavities. Two non-dimensional parameters sigma and gamma, which are based on the Delaunay subdivision of the cross sectional images of a contactor, are used to characterize the topological features of the void spaces among the fibers. The sigma and gamma characterize the uniformity of the void spaces and the channel size of the cut-through cavities, respectively. The pressure drops/Nusselt numbers of a contactor exhibit power law relations to the topological parameter gamma. The constants in correlations are found to be dependent on the packing densities. The results can be used to predict the pressure drops and Nusselt number of those massively produced hollow fiber membrane contactors with randomly distributed fibers. Solid inserts that are used to reduce the size of cut-through cavities are suggested. (C) 2019 Elsevier Ltd. All rights reserved.
机译：研究了新型错流中空纤维膜接触器中的流体流动和传热。光纤束随机封装在接触器外壳中，其分布拓扑因情况而异。填料密度和入口流量雷诺数分别为0.35至0.5和20至180。发现接触器的压降和传热系数与纤维之间的空隙空间的拓扑特性相关。尤其是，纤维中大空腔的拓扑特征显示出主导作用。确定了两个典型的大型腔，即隔离型腔和直通型腔。基于接触器横截面图像的Delaunay细分的两个无量纲参数sigma和γ用于表征纤维中空隙空间的拓扑特征。 σ和γ分别表示空隙的均匀性和直通型腔的通道尺寸。接触器的压降/努塞尔数与拓扑参数γ呈幂律关系。发现相关常数取决于填充密度。该结果可用于预测那些大量生产的具有随机分布纤维的中空纤维膜接触器的压降和Nusselt数。建议使用实心刀片来减小穿通孔的尺寸。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 作者

    He Kui; Zhang Li-Zhi;

  • 作者单位

    South China Univ Technol, Sch Chem & Chem Engn, Educ Minist, Key Lab Enhanced Heat Transfer & Energy Conservat, Wushan Rd, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Sch Chem & Chem Engn, Educ Minist, Key Lab Enhanced Heat Transfer & Energy Conservat, Wushan Rd, Guangzhou 510640, Guangdong, Peoples R China|South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou 510640, Guangdong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Membrane contactor; Tube bank; Random distribution; Cross flow; Heat and mass transfer;

    机译：膜接触器;管束;随机分布;错流;传热传质;

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