Fluid-solid drag models selection for simulating wheat straw particle movement in anaerobic digester
作者机构：College of Mechanical and Energy EngineeringTongji UniversityShanghai 201804China Institute of New Rural DevelopmentTongji UniversityShanghai 201804China
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2023年第16卷第2期
页 面：249-258页
核心收录：
学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）]
主 题：wheat straw particle drag model shape coefficient image analysis micro PIV measurement
摘 要：Computational fluid dynamics(CFD)has been utilized to simulate the movements of wheat straw particles for agitator speed selection in full-scale wet *** research has found that the current drag model generally used for depicting the motion of spherical particles cannot match the movement behavior of wheat straw particles with their non-spherical *** this study,the sedimentation experiment and horizontal flow experiment of straw particles were determined using a V20-3D camera and a micro Particle Image Velocimetry(PIV)*** analyses of the experimental data and CFD simulation results,the prediction accuracies of the non-spherical drag models of Hölzer and Sommerfeld(HS),Kishore and Gu(KG),Haider and Levenspiel(HL),Richter and Nikrityuk(RN),and Fabio Dioguardi(FD)were evaluated by the motion of individual straw *** results showed that the KG model has a significant advantage over the other drag models,both simulating the particle settling velocities in a one dimensional settling experiment and simulating the predictable trajectory in a two-dimensional horizontal flow ***,the KG drag model was selected to simulate with CFD the wheat straw particle movement to select agitator ***,the realizable k-turbulence model was proven to be superior to the other turbulence models for simulating the continuous phase flow with CFD.
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