Multiphase systems

From Thermal-FluidsPedia

A multiphase system is one characterized by the simultaneous presence of several phases, the two-phase system being the simplest case. The analysis of multiphase systems can include consideration of multiphase flow and multiphase heat and mass transfer. Based on the phases that are involved in the system, phase change problems can be classified as: (1) solid-liquid phase change (melting and solidification), (2) solid-vapor phase change (sublimation and deposition), and (3) liquid-vapor phase change (boiling/evaporation and condensation).

• Basics of Heat Conduction
• Governing Equations
• Interfacial Phenomena
• <b>Melting and Solidification

Classification, boundary conditions at interface, exact solution,and numerical solution, effect of natural cvonvection.

• Condensation

Basics, dropwise condensation, vertical plate, cylinder and sphere, nongravitational condensate removal, and film condensation in porous media.

• Evaporation

Bascis, horizontal plare, falling film evaporation, direct contact, pores and microchannels, and porous media.

• Boiling

Pool boiling regimes, nucleate boiling, critical heat flux (CHF), transition boiling, minimum heat flux, film boiling, and boiling in porous media.

• Two-Phase Flow

Flow Patterns, flow models, forced convective condensation, forced convective boiling, and micro- and minichannels.