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.

Viscous fingering with simultaneous chemical reaction at interface is investigated in a micro channel based on lattice Boltzmann method. One-variable chemical model admitting two stable states is adopted. We focus on influence of chemical reaction on viscous fingering. It is found that fluid interface become thinner with increase of reaction rate, while changes of steady state concentration (interfacial concentration where rate of chemical reactions is zero) influence position and morphology of viscous fingering. Isolated droplet can be formed from tip of finger.

We study carbonation process of CaO with lattice Boltzmann method. Specifically,effects of porosities of CaO particles on carbonation rate are investigated. It shows that efficiency depends on porosity nonlinearly due to competition between molar mass and permeability of particles.