Properties of disturbance waves in vertical annular two-phase flow

Application of a high-speed laser-induced fluorescence technique for studying the three-dimensional structure of annular gas–liquid flow

“…It was found that, when the gas stream velocity is increased, the disturbance wave velocity and passing frequency increase, amplitude decreases, and longitudinal length remains nearly constant. An increase in the liquid flow rate leads to slight increases in all of the aforementioned characteristics (e.g., Chu and Dukler 1975;Azzopardi 1986;Han et al 2006;Sawant et al 2008). Properties of disturbance waves evolve with distance below the inlet; in particular, their amplitude and velocity increase and their frequency decreases downstream (Hall Taylor and Nedderman 1968;Wolf et al 2001).…”

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

“…He used a curve-fitting method based on his own data. This correlation is very similar to the one presented above, and is given by Hazuku et al [Sawant, 2008b] Although, as it has been said by Sawant, the presented correlation successfully predicts the low-pressure data, it failed to predict the high-pressure data. Therefore, the following new correlation was proposed where the adjustment constants are obtained based on the Sawant's experimental data, using regression analysis.…”

“…Omebere-Iyari and Azzopardi [Omebere-Iyari, 2007;Sawant, 2008b] correlated, using the Pearce's correlation, a database of disturbance wave velocity, and they also evaluated the diameter dependence of Pearce coefficient. The authors found that K increases from 0.51 to 0.9 when the pipe diameter increases from 0.5 to 2.5 cm.…”

Studying the influence of refrigerant type on thermal efficiency of annular two-phase flows; mass transfer viewpoint

“…Variation of interfacial waves amplitude against Weber number; comparison between experiment of Sawant et al[28] and the present model (We=ρ g j g 2 d/σ((ρ l −ρ g )/ρ g ) 1/3 where j g is superficial velocity).…”

“…5 and 6, respectively. Since the interfacial wave amplitude and wavelength are directly related to the entrainment rate, simulation results of the present study are compared with experimental observations of Sawant et al [28]. The flow and physical conditions of the present problem are set to those of Sawant et al's experiment to have an applicable comparison between the results.…”