Flow and heat transfer characteristics of the evaporating extended meniscus in a micro-capillary channel

Effects of superheat and temperature-dependent thermophysical properties on evaporating thin liquid films in microchannels

“…(29) shows that DP l consists of the vapor pressure difference (DP v = P v (x)ÀP v (0)), the capillary pressure drop (0ÀrK(x)) and the disjoining pressure drop (A=d 3 0 ÀA/d(x) 3 ). The vapor pressure difference, DP v , is 3 $ 5 orders of magnitude less than the liquid pressure difference and, thus, negligible [23,24]. Eq.…”

“…Park et al [23,24] assumed that the adsorbed film thickness was equal to 1 nm as the boundary condition. However, a minor change in the adsorbed film thickness can result in large changes in the thin film flow and heat transfer [15] and the evaporation rate can be increased by reducing the adsorbed film thickness [12,14].…”

“…Most previous investigations assumed a constant vapor pressure and the effects of the vapor flow were neglected. However, Park et al [23,24] concluded that the vapor pressure gradients significantly affect the thin film profile. This paper presents a model describing the superheat effects on the two-phase flow and heat transport phenomena of the extended evaporating meniscus in a microchannel.…”

Experimental investigation of capillary-assisted evaporation on the outside surface of horizontal tubes

“…The previous researches concerning the capillaryassisted evaporation can be divided into two branches: one is the fundamental researches on its heat and mass transfer mechanism, and most of them are based on the physical model of an extended meniscus [2][3][4][5][6][7][8][9][10][11][12][13]; the other is the application researches of such evaporation method, and, usually, the tubes with outside or inside enhanced surfaces are the research objects [14][15][16].…”

Thin film evaporation in microchannels with interfacial slip

“…Sultan et al (2005) investigated the effects of Marongoni instabilities on the thin film evaporation process, which may result in a wave-like motion of the interface due to the prevailing temperature gradients. Park and Lee (2003) presented a concise review of the mechanisms governing interfacial phenomena and heat transfer in thin film evaporation processes. Chakraborty and Som (2005), in a more recent study, linked the rate of evaporation from the free surface of the thin liquid film into a medium of air and water vapor maintained throughout at a temperature below the saturation temperature corresponding to its existing pressure with the vapor phase mass diffusion.…”