Analysis of the effects of Marangoni stresses on the microflow in an evaporating sessile droplet.

摘要: We study the effects of Marangoni stresses on flow in an evaporating sessile droplet, by extending a lubrication analysis and finite element solution field drying developed earlier.1 The temperature distribution within droplet is obtained from Laplace's equation, where quasi-steadiness neglect convection terms heat equation can be justified for small, slowly droplets. evaporation flux profiles along surface are approximated simple analytical forms used as boundary conditions to obtain axisymmetric theory relatively flat A algorithm also solve simultaneously vapor concentration, thermal fields which shows that with stress accurate contact angles high 40°. From our analysis, we find surfactant contamination, at a...