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Apparent viscosity of mixed particle system in pulsed gas-solid separation fluidized bed 被引量:1
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作者 Zhonglin Gao Chenlong Duan +1 位作者 Yuemin Zhao Pengfei Mao 《Particuology》 SCIE EI CAS CSCD 2022年第12期41-46,共6页
The apparent viscosity reflects the resistance of the fluidized medium in the bed to the beneficiation particles,which directly affects the separation time and mismatch content.So,the falling-ball method was used to m... The apparent viscosity reflects the resistance of the fluidized medium in the bed to the beneficiation particles,which directly affects the separation time and mismatch content.So,the falling-ball method was used to measure the apparent viscosity of a binary medium in a pulsed fluidized bed by varying the gas velocity,pulsation frequency,and fine particle content.The results show that with increasing gas velocity and fine particle content,the apparent viscosity of the bed gradually decreased,whereas it first decreased and then increased with pulsation frequency increasing and achieved a minimum value in the range of 4-6 Hz.Within limits,the adjustment of gas velocity and fine content can effectively reduce the apparent viscosity and improve the separation process.A model for predicting the apparent viscosity in a pulsation separation fluidized bed was established with good accuracy. 展开更多
关键词 Pulsed fluidized bed Mixed medium Apparent viscosity Drag coefficient
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Nonstationary plane contact problem in theory of elasticity for conformal cylindrical surfaces
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作者 Veniamin D.Kubenko Ihor V.Yanchevskyi 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2017年第2期190-197,共8页
A numerical–analytical approach is described to investigate the process of impact interaction between a long smooth rigid body and the surface of a circular cylindrical cavity in elastic space. A non-stationary mixed... A numerical–analytical approach is described to investigate the process of impact interaction between a long smooth rigid body and the surface of a circular cylindrical cavity in elastic space. A non-stationary mixed initial boundary value problem is formulated with a priori unknown boundaries moving with variable velocity. The problem is solved using the methods of the theory of integral transforms, expansion of desired variables into a Fourier series, and the quadrature method to reduce the problem to solving a system of linear algebraic equations at each time step. Some concrete numerical computations are presented.The cylindrical body mass and radius impact on the proile of the transient process of contact interaction has been analysed. 展开更多
关键词 Non-stationary mixed problem Cylindrical cavity in elastic medium Rigid body Contact interaction Fourier expansion
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