流场中轻浮颗粒下拉方式数值模拟与对比分析
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摘要
基于Fluent软件,采用VOF和DPM模型对振动混合器和叶轮搅拌器中轻浮颗粒的分散过程进行数值模拟,分析了颗粒分散效果的影响因素。结果表明,与叶轮搅拌相比,振动混合器在相同离底间隙的条件下,轻浮颗粒的下拉效果更好,消耗功率更少。
Based on Fluent software,VOF and DPM models were applied to simulate the dispersion of light-floating particles in vibratory mixer and impeller agitator,and the factors affecting the dispersion effect of light-floating particles were investigated.The results show that the vibratory mixer has better pull-down effect and less power consumption than the impeller agitator under the same bottom clearance condition.
Based on Fluent software,VOF and DPM models were applied to simulate the dispersion of light-floating particles in vibratory mixer and impeller agitator,and the factors affecting the dispersion effect of light-floating particles were investigated.The results show that the vibratory mixer has better pull-down effect and less power consumption than the impeller agitator under the same bottom clearance condition.
引文
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[3]王刚,李江,陈念铀.武钢第三炼钢厂铁水脱硫工艺的应用与发展设想[J].炼钢,2002,18(6):15-19.
[4] Brauer H.Mixing processes in stirred vessels and in reciprocating-jet-reactor[J].Inzynieria Chemicznai Procesowa,1994,15(1):15-36.
[5] Brauce H,Annachhrate A P.Nitrification and denitrification in a system of reciprocating jet bioreactor[J].Bioprocess and Biosystems Engineering,1992,7(6):269-275.
[6] Ryszard W.The vibromixers-a current state of research and trends of further investigations[C]//18th International Conference in Process Engineering and Chemical Plant Design,Berlin,19-23Sep.2011:124-134.
[7]Wjtowicz R.Choice of an optimal agitated vessel for the drawdown of floating solids[J].Industrial and Engineering Chemistry Research,2014,53(36):13989-14001.
[8]Khazam O,Kresta S M.Mechanisms of solids drawdown in stirred tanks[J].Canadian Journal of Chemical Engineering,2008,86(4):622-634.
[9] Tamburini A,Cipollina A,Micale G,et al.CFD simulations of dense solid-liquid suspensions in baffled stirred tanks:prediction of the minimum impeller speed for complete suspension[J].Chemical Engineering Journal,2012,193-194:234-255.
[10]Sun J L,Tu H W,Chen Y N,et al.A study on trim optimization for a container ship based on effects due to resistance[J].Journal of Ship Research,2016,60(1):30-47.
[11]Liu Z,Li M,Xu W T,et al.On the agitation characteristic curve of medium light particles in a stirred tank based on CFD simulation[J].Journal of Chemical Engineering of Japan,2018,51(7):556-565.