Numerical simulation of multiphase flow in hydrocyclone based on CG vof-dem and CG mixture DEM models
Received:October 09, 2020  Revised:October 12, 2020
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DOI:doi:10.3969/j.issn.1671-9492.2021.04.020
KeyWord:hydrocyclone; discrete element method; computational fluid dynamics; particle motion
     
AuthorInstitution
Yuan Ji Shaanxi Railway Institute
Wang Linjun College of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou
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Abstract:
      In order to solve the problem that the internal flow field is complex and the particle motion law is difficult to master in the separation process of solid particles fed by hydrocyclone. Based on the theory of particle dynamics and the concept of coarse particles (CG), two numerical models are proposed to model multiphase flow in hydrocyclones: one is CG vof-dem model which combines multi-phase flow (VOF) model with discrete element method (DEM); the other is CG mixture DEM which combines mixture model and DEM model. The simulation results show that the CG vof-dem model is suitable for sparse flow quantitatively and only qualitatively for dense flow. On the other hand, CG mixture DEM model can be applied to sparse flow and dense flow quantitatively. The results show that CG mixture DEM model can be used as an effective tool to evaluate the separation performance of hydrocyclones.
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