Nonisothermal Evaporation of Sessile Drops of Aqueous Solutions with Surfactant

In recent decades, electronic devices have tended towards miniaturization, which necessitates the development of new cooling systems. Droplet on a heated wall is effectively used in power with high heat flux densities. The use surfactant leads to an increase diameter wetted spot and rate droplet evaporation. Despite wide interest numerous works this area, there are still unexplored questions regarding influence temperature convection, nonisothermality, decrease partial pressure vapor increasing concentration. This work experimentally studies effect evaporation range 20–90 °C concentration aqueous solution sodium lauryl sulfate (SLS) from 0 10,000 ppm. It shown for first time that inversion related occurs temperature. key factors water SLS changes Thus, at slightly wall, growth becomes predominant. At flux, role nonisothermality To determine individual vapor, experiments liquid layer were carried out. obtained results simplified estimates may be develop existing calculation models, as well optimize technologies highly surfaces.