Modeling of Rayleigh convection in gas-liquid interfacial mass transfer using lattice Boltzmann method

► A lattice Boltzmann method was established for simulating Rayleigh convection. ► A random perturbation model was proposed for evoking the convection. ► The model parameters were identified by comparing simulation with experiment and theory. ► The method can capture the onset and temporal-spatial evolution of the convection. ► The liquid-phase mass transfer rate is effectively enhanced by Rayleigh convection.