Wave-augmented mass transfer in a liquid film falling inside a vertical tube

Numerical and experimental investigation of a vertical LiBr falling film absorber considering wave regimes and in presence of mist flow

“…According to the above mentioned hypotheses, the governing conservation equations of mass (15), momentum (16), energy (17) and mass species (18) can be written as:…”

“…It is well known that wavy motion in falling liquid films significantly enhances the heat and mass transfer. Therefore, both experimentally and analytically by many authors [13][14][15][16][17][18][33][34][35][36][37][38][39][40][41][42][43][44][45] have been investigated. The problem is not an easy issue from a numerical point of view, due to heat and mass transfer coupled problems and the presence and the unsteady behaviour of the wave motion.…”

“…Experimental observation shows that wavy regime appears even in low Reynolds number (Re ≈ 20) [13,14]. It is also well known that wavy regime causes increase of diffusion and mass transfer [15][16][17][18]. For this reason, wavy profiles are implemented together with falling film formulation.…”

Disturbance wave development in two-phase gas–liquid upwards vertical annular flow

“…gas-liquid oil wells), evaporators and condensers (Hewitt and Hall-Taylor 1970;Andreussi et al 1985;Schadel et al 1990;Alekseenko et al 1994Alekseenko et al , 2009Pan and Hanratty 2002;Park et al 2004). This flow regime corresponds to a situation in which the liquid phase flows in the form of a film on the inside of the conduit wall, in addition to droplets entrained within the gas phase.…”

Numerical investigation of steam absorption in falling film of LiBr aqueous solution with solitary waves

“…It is well known that falling films are inherently unstable and this instability leads to formation of waves on film surface. Significant amount of works have been carried out to investigate the effects of surface wave on heat and mass transfer (Wasden and Dukler, 1990;Yoshimura et al, 1996 ;Park et al, 2004). However, only few works are performed for simultaneous heat and mass transfer condition.…”