Gas–solid interaction force from direct numerical simulation (DNS) of binary systems with extreme diameter ratios

查看全文 作　　者：S. [1]Sarkar;S.H.L. [1]Kriebitzsch;M.A. van der [1]Hoef;J.A.M. [1]Kuipers

机构地区：[1]Department of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands

出　　处：《Particuology》索引2009年第7卷第4期,共5页

基　　金：funded by the Nederlandse Organisatievoor Wetenschappelijk Onderzoek(Netherlands Organization forScientific Research,NWO) 摘　　要：Fluid-particle systems as commonly encountered in chemical, metallurgical and petroleum industries are mostly polydisperse in nature. However, the relations used to describe fluid-particle interactions are originally derived from monodisperse systems, with ad hoc modifications to account for polydispersity. In previous work it was shown that for bidisperse systems with moderate diameter ratios of 1:2 to 1:4, this approach leads to discrepancies, and a correction factor is needed. In this work we demonstrate that this correction factor also holds for more extreme diameter ratios of 1:5, 1:7 and 1:10, although the force on the large particles is slightly overestimated when using the correction factor. The main origin of the correction is that the void surrounding the large particles becomes less in case of a bidisperse mixture, as compared to a monodisperse system with the same volume fraction. We further investigated this discrepancy by calculating the volume per particle by means of Voronoi tessellation. 关键词：相互作用力双星系统直径比直接数值模拟 DNS 天然气 VORONOI 固体

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Gas–solid interaction force from direct numerical simulation (DNS) of binary systems with extreme diameter ratios

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