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Lattice Boltzmann Simulation of Droplet Formation in Non-Newtonian Fluids

Published online by Cambridge University Press:  30 April 2015

Y. Shi  and
G. H. Tang
Y. Shi
Affiliation:
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, P.R. China
G. H. Tang*
Affiliation:
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, P.R. China
*
*Corresponding author. Email address: ghtang@mail.xjtu.edu.cn (G. H. Tang)
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Abstract

Newtonian and non-Newtonian dispersed phase droplet formation in non-Newtonian continuous phase in T-junction and cross junction microchannels are investigated by the immiscible lattice BGK model. The effects of the non-Newtonian fluid power-law exponent, viscosity and interfacial tension on the generation of the droplet are studied. The final droplet size, droplet generation frequency, and detachment point of the droplet change with the power-law exponent. The results reveal that it is necessary to take into account the non-Newtonian rheology instead of simple Newtonian fluid assumption in numerical simulations. The present analysis also demonstrates that the lattice Boltzmann method is of potential to investigate the non-Newtonian droplet generation in multiphase flow.

Keywords

76T1068U20Dropletnon-Newtonian fluidlattice Boltzmann methodmultiphase flowmicrochannel
Type
Research Article
Information
Communications in Computational Physics , Volume 17 , Issue 4 , April 2015 , pp. 1056 - 1072
Copyright
Copyright © Global-Science Press 2015 

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