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Parallel computation of two-phase flow in a microchannel using the lattice Boltzmann method

Suresh Alapati/Sangmo Kang/Yong Kweon Suh
The Journal of Mechanical Science and Technology, vol. 23, no. 9, pp.2492-2501, 2009

Abstract : We present a numerical simulation of two-phase flow in a three-dimensional cross-junction microchannel by using the lattice Boltzmann method (LBM). At first, we validated our LBM code with the velocity profile in a 3-dimensional rectangular channel. Then, we developed a lattice Boltzmann code based on the free energy model to simulate the immiscible binary fluid flow. The parallelization of the developed code is implemented on a PC cluster using the MPI program. The numerical results of two-phase flow in the microchannel reveal droplet formation process, which compares well with corresponding experimental results. The size of droplet decreases with increase of the flow-rate ratio and the capillary number. The movement of a droplet through the microchannel induces three-dimensional circulating flow inside the droplet. This complex flow is thought to enhance the mixing and reaction of reagents.

Keyword : Free-energy model; Lattice Boltzmann method; Microchannel; Mixing; Two-phase flow

 
 
 
 
 
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