Abstract
In this work, we propose a smoothed particle hydrodynamics (SPH) model that can describe multi-fluid flows that are mutually miscible. The model is constructed on the basis of a one-fluid description by correlating relative motions between component fluids to mass transfer between SPH particles. The model can represent complicated phenomena in a multi-fluid by incorporating the Maxwell–Stefan diffusion model and by solving n continuity and momentum equations. The diffusion term and advection term in the model are separately investigated and validated through various benchmarking cases. The results show that the model can successfully describe behaviors of miscible multi-fluids below a particle-resolution scale. The model is expected to be able to describe not only a gaseous mixture, but also a liquid mixture. It is also possible to model the reactive gas or liquid transport by extending the model to incorporate the reaction kinetics. Study of the latter problem is currently underway.
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