Hydrodynamics three-phase boundary

Abstract. The lectures review the statics and dynamics of the gas-liquid-solid contact line, with the emphasis on the role of intermolecular forces and mesoscopic dynamics in the immediate vicinity of the three-phase boundary. We discuss paradoxes of the existing hydrodynamic theories and ways to resoluve them by taking account of intermoleculr forces, activated slip in the first molecular layer, diffuse character of the gas-liquid interface and interphase transport. 

A clear and operational boundary should be established between slurry reactors and three phase fluid beds. Particle diameter alone (e.g. d < 200 pm for slurry reactors) is not sufficient and boundaries snould be based on hydrodynamic regime, settling velocities and turbulence parameters. 

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