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1. CFD simulations on hydrogenation of 2-ethylanthraquinone under Taylor flow in microchannels with and without chemical reaction | |||
Yaru Guo,Zhigang Lei,Chengna Dai | |||
Chemical Engineering 06 May 2016 | |||
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Abstract:The characteristics of mass transfer under Taylor flow with and without chemical reaction in circularmicrochannelswere investigated by Computational Fluid Dynamics (CFD) using the hydrogenation process of 2-ethylanthraquinone (EAQ) as a model reaction.The volumetric mass transfer coefficients in liquid phase (kLa) without chemical reaction were calculated for various parameters such as channel diameter, bubble rise velocity, unit cell length, and so on.The trend ofkLa with various parameters was obtained.The enhancement factor ofmass transferβ was introducedto quantitatively analyze mass transfer enhancement phenomenondue to the consumption of hydrogenunder chemical reaction. | |||
TO cite this article:Yaru Guo,Zhigang Lei,Chengna Dai. CFD simulations on hydrogenation of 2-ethylanthraquinone under Taylor flow in microchannels with and without chemical reaction[OL].[ 6 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4686639 |
2. Lattice Boltzmann simulation of the lateral migration of a particle in constant shear flow | |||
LIU Malin | |||
Chemical Engineering 01 May 2014 | |||
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Abstract:The lateral migration of a particle in constant shear flow was investigated using the 3D lattice Boltzmann method. Relationships between particle rotation velocity, lateral velocity, equilibrium lateral position and wall velocity were analyzed and the slip velocity was discussed. Lateral forces, including shear lift force, rotational lift force and lateral drag force, were calculated from the simulation results. The total lateral force changed sign before reaching the equilibrium position. The shear lift force and lateral drag force were much larger than the rotation lift force. The balance between them determined the particle equilibrium lateral position. A new correlation for the shear lift force is proposed by analogy with Saffman's expression. | |||
TO cite this article:LIU Malin. Lattice Boltzmann simulation of the lateral migration of a particle in constant shear flow[OL].[ 1 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4591622 |
3. Slip velocity of a buoyantly neutral particle in shear flow:a mathematical explanation | |||
LIU Malin | |||
Chemical Engineering 02 April 2014 | |||
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Abstract:A calculation of the lateral migration of a buoyantly neutral particle in shear flow using the minimum disturbance principle showed that the slip velocity is important in determining the lateral equilibrium position. A mathematical analysis of the slip velocity using simulation and experimental results is given, which indicated that three factors: particle size, particle initial position and wall effect should be also taken into account in calculating the effective fluid velocity. The analysis, confirmed by lattice Boltzmann method (LBM) simulation, showed that the Segre-Silberberg effect exists in constant shear flow. The validity of the minimum disturbance principle for constant shear flow was verified by the agreement in the particle velocities calculated from the minimum disturbance principle and LBM simulation. | |||
TO cite this article:LIU Malin. Slip velocity of a buoyantly neutral particle in shear flow:a mathematical explanation[OL].[ 2 April 2014] http://en.paper.edu.cn/en_releasepaper/content/4591625 |
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