Convection in an evaporating drop of aqueous solution at a high concentration of microscopic particles

Abstract

This article presents the performed experimental studies on the effect of the concentration of microparticles on free convection in a water drop located on a heated smooth and textured wall surface. It is shown that at a high concentration of particles, their aggregation and deposition take place on the wall and on the free surface of droplet. As a result, the average convection velocity in the droplet decreases significantly. Suppression of convection is important to consider when simulating heat transfer and droplet evaporation. The results obtained are important for technologies that use colloidal solutions (drops, films).

Influence of conditions of liquid dosing on water droplet spreading

“…The desirable properties of structural materials can be obtained by different treatment methods, in particular, abrasive treatment [4]. Due to the developed texture of metal surfaces, it is possible to significantly increase the heat flux [5], increase convection [6] and boiling characteristics [7,8]. This work is aimed at studying the influence of the developed texture of metal surfaces on spreading characteristics, in particular, the dynamic contact angle.…”