Entrainment Rate of Droplets in the Ripple-Annular Regime for Small Vertical Ducts

Estimation of the radioactive aerosols capture in accidental sequences of nuclear power plants

“…For instance, Ishii and Grolmes [Ishii, 1975] suggest a value of 160; Abolfadl linked the start of entrainment with the onset of turbulence in the film, then he specified a value to the onset of entrainment Reynolds number of 268 based on its available experimental data; Okawa [Okawa, 2003] takes a critical value of 320 from experimental data. Lower values are proposed by other authors, for instance, Nigmatulin [Alipchenkov, 2004] proposes a value for the onset of entrainment Reynolds number of 180, Andreussi et al suggest a value of 94 approximately, Azzopardi [Azzopardi, 1983;Lopez de Bertodano 1998] gave a value of 80 based on wave inception results for both Freon and water.…”