Momentum transfer in a vertical down flow liquid jet ejector: case of self gas aspiration and emulsion flow

Design aspects of ejectors: Effects of suction chamber geometry

“…Since it is the suction chamber where the two streams of the primary and secondary fluid meet, its geometry is bound to Kroll (1947) --Well rounded 20--25 7 4--10 0.5--5 Davies et al (1967) 22.6--247 Well rounded --7 10 1.9 a Bhat et al (1972) 3.7--25.1 Conical 28 0 10 8.9 Cunningham and Dopkin (1974) 2.2--6.5 Well rounded --12.3--32.4 4.0 3.0 a Acharjee et al (1975) 5.4--50.4 Well rounded --8 10 2.0 a Biswas et al (1975) 1.4--12.8 Well rounded --6 7 1.9 a Zahradnik et al (1982) 33.8--113.8 Conical --0 6.4 -- Henzler (1983) 2.0--25.5 Well rounded --7.5 5 0.4--0.9 a Moresi et al (1983) 1.5--3.5 Conical 17.35 1.8 9.5 --Ben Ebrahim et al (1984) 4.0 Conical --3.5 2.0 -- Bhutada and Pangarkar (1987) 1.8--10.2 Conical or bell-shaped 12 0--16 5.0 3.0 a Mukherjee et al (1988) 1--50.6 Well rounded --10.8 7 -- Kundu et al (1994) 29.3--169.8 Conical --7 7 -- Kundu et al (1995) 29.3--169.8 Well rounded --9.7 7 -- Havelka et al (1997) 3.24 Conical --5--20 7 --Fernandez (2001) ------6 8 1.0 Cramers and Beenackers (2001) 2.1--9.0 Conical --2--10 3.0 -- Elgozali et al (2002) --Conical --10 7 2.72 Gamisans et al (2004) --Conical --0.5--1.3 ---- Rusly et al (2005) 2.5 Conical 10 5.0 7 5.0 Mandal et al (2005a) 10.0 Well rounded --9.7 9.1 -- Mandal et al (2005b) 5.6--14.4 Well rounded --9.7 9.1 -- Majumder et al (2005) 7.4--22.5 Well rounded --9.6 7 --Li and Christofides (2005) --Conical 12 1.1 2 2.17 Das and Biswas (2006) 15.5--59.5 ----7.76 8.6 -- Sriveerakul et al (2007) 5.6--10.0 Well rounded --1--6 10 1.1--6.8 a Indicate the optimum value suggested by the investigator.…”

Hydrodynamics and mass transfer characteristics of gas–liquid ejectors

“…Some of the previous models reported by refs. [5,13,14] take the compressibility of air into account. But all these models were developed for liquid as the motive fluid and Table 1 Mass ratio correlations from dimensionless analysis given by various authors [10] the gas as the entrained fluid.…”

“…Various authors [4,5,8,[11][12][13][14] have attempted to predict the entrainment rate based on momentum and energy balances across different sections of the ejector. Table 2 shows the geometry of ejectors and the respective correlations obtained through such analysis as available in literature.…”

“…In chemical industries, ejectors are also used to entrain and pump corrosive liquids, slurries, fumes and dust-laden gases, which otherwise are difficult to handle [4]. Jet ejectors can also be used for mass transfer operations like gas absorption or stripping [5].…”

Experimental Study on a Co-current Gas-Liquid Down Flow Contactor with Gas Entrainment by a Liquid Jet

“…Correlations have been developed to predict pressure drop and gas holdup as a function of different physical and dynamic variables. Studies have also been reported in a downflow column with a simultaneous gas liquid injection nozzle by Ben Brahim et al [4] and Bando et al [5].…”