Intermolecular forces in phase‐change heat transfer: 1998 Kern award review

Experimental investigation of steady buoyant-thermocapillary convection near an evaporating meniscus

“…The efficacy of heat transfer in thin films is attributed to a high liquid pressure ͑termed as disjoining pressure by Derjaguin 13 ͒ gradient, which results in liquid being pulled into the thin-film region, as well as the very low thermal resistance resulting from the small film thickness. Wayner and co-workers 14,15 carried out extensive theoretical and experimental studies in this field and delineated several important factors influencing thin-film evaporation. Ma and Peterson 16,17 developed experimentally verified models for evaporation from V-grooves to predict its maximum heat transport limit.…”

Electrostatic effects in the apparent contact line region under a vapor bubble

“…Numerous theoretical and experimental studies of evaporation near apparent contact lines are reviewed e.g. in Wayner [1] and Ajaev and Homsy [2]. While most of these studies address the situation when the apparent contact line is stationary, the approach can be extended to the case of moving contact lines as well, as was first shown by Ajaev et al [3].…”

“…Such singularity leads to the unphysical conclusion about the resistance force near the moving contact line being infinite; the approach of Ajaev et al [3] allows one to relax the singularity and thus leads to finite value of resistance force at the contact line. The assumption of ultra-thin films being dominated by the London-van der Waals forces [1,2] is appropriate for describing experimental data with liquids such as pentane and hexane, but not in water and aqueous solution. The latter situation was investigated in the pioneering experimental study of Mazzoco and Wayner [4].…”

Modified model of droplet’s spreading on solid body in presence of liquid microfilm

“…• surface is horizontal, smooth, heterogenic and free from micro-impurities, • surface is coated with a thin liquid microfilm on which the liquid spreads, • there is a lack of thermal relations among surface, droplet and environment; the liquid's spreading process is isothermal, [4,5,7,[16][17][18]. Control volume has been separated from the droplet in the phase of its maximal spreading (Fig.1).…”

“…Kind of material, impurities and roughness of the surface, its shape and inclination are significant factors that characterize a solid body [2]. In turn, gas phase that surrounds the surface can be decisive for the formation of a thin microfilm on the surface of the solid body [3][4][5][6][7]. The microfilm has influence on the droplet's spreading process.…”