Lattice Boltzmann Study on Influence of Chemical Reaction on Mixing of Miscible Fluids with Viscous Instability in Porous Media

Abstract

Abstract: Using Lattice Boltzmann method on GPU, viscous fingering of chemical fluids in porous media is simulated at pore scale. Influence of chemical reaction on fluid mixing is quantified. A one-variable chemical model admitting two stable states is adopted and a homogeneous artificial medium is generated by Quartet Structure Generation Set (QSGS) method. It shows that chemical reaction makes fingering interfaces sharp, restrains fluid mixing, and causes demixing. Influence is enhanced with increase of chemical reaction rate.

Key words: lattice Boltzmann method, mixing of miscible fluids, chemical reaction, pore-scale, GPU computing

CLC Number:

O363

LEI Timan, MENG Xuhui, GUO Zhaoli. Lattice Boltzmann Study on Influence of Chemical Reaction on Mixing of Miscible Fluids with Viscous Instability in Porous Media[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2016, 33(4): 399-409.

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