Simulation of enhancement of mass transfer in nano-fluids by lattice Boltzmann method

The process of mass transfer in nano-fluids was simulated by using lattice Boltzmann method based on two different ways, one is based on the finite volume of a particle method and the other is based on the point source of particles method. In those methods, the modified Boltzmann equation and the equation of mass diffusion coefficient in nano-fluids was given, moreover, the numerical results were compared with Xuan Yimin's experimental data. Finally, the mass diffusion coefficient of CO ₂ in nano-fluids were calculated, the results show that the micro-perturbation of nano-particles greatly enhanced on the mass transfer, provide a new way for CO ₂ absorption, and proved that the reason of enhancement of mass transfer in nano-fluid is mainly relied on the convective mass transfer that was caused by the micro-perturbation of nano-particles.