Interfacial heat transfer models for flashing flows: a review

An extensive literature review on existing models for interfacial heat transfer in flashing of pure liquids was carried out. It reveals that recent numerical simulations rely still on empirical closures. A correlation in terms of the Jakob number, Reynolds number and Prandtl number might be the most promising one. However, all the validation against experiment is limited to single spherical droplet or bubble. For large deformed bubbles and high void fractions, there are still no direct validation due to the lack of experimental data and complicated intervening physics. Improvement regarding the effect of bubble interaction, interfacial morphology and turbulence is necessary.