Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Fluid Dynamics and Turbulence

DY 33.8: Vortrag

Mittwoch, 22. März 2017, 12:00–12:15, ZEU 160

Detailed finite element method modeling of evaporating multi-component droplets — •Christian Diddens — Eindhoven University of Technology, The Netherlands

The evaporation of sessile multi-component droplets is modeled with a finite element method. The model comprises the coupled processes of mixture evaporation, multi-component flow with composition-dependent fluid properties and thermal effects. Based on representative examples of water-glycerol and water-ethanol droplets, regular and chaotic examples of solutal Marangoni flows are discussed. Furthermore, the relevance of the substrate thickness for the evaporative cooling of volatile binary mixture droplets is pointed out. It is shown how the evaporation of the more volatile component can drastically decrease the interface temperature, so that ambient vapor of the less volatile component condenses on the droplet.