“…For example, the "burnout and post-burnout" heat flux in light-water cooled nuclear reactors (Collier, 1961;Petrovichev et al, 1971; Cousins et al, 1965), the effectiveness of the emergency core cooling systems in water reactors (Semeria and Martinet, 1965;Yamanouchi, 1968;Duffey, 1973), and the performance of the film cooling of jet and rocket engines (Kinney et al, 1957;Knuth, 1954) can be significantly affected by the entrainment of the liquid film into the gas core flow. We also note that the prediction of sodium film and cladding relocation in the liquid metal fast breeder reactors (Henry et al, 1974;Grolmes et al, 1974) as well as gas-cooled fast reactors under accident conditions could be affected by a reliable entrainment criterion.…”