This paper describes low Reynolds number vortices that can occur during the evaporation of a polymer solution inside a cavity. Confocal microscopy combined with image processing, micro particle image velocimetry, and micro laser induced fluorescence are used to measure the unsteady evaporation-driven velocity field and the concentration field in a shallow liquid film inside a microliter cavity near a wall. In addition to evaporation-driven flow and Marangoni flow, the velocity field also reveals single and multiple vortices generated by the creeping flow induced by evaporation. Similar to other low Reynolds number vortices, it is seen that the geometry strongly affects the presence, endurance and size of these vortices during the evaporation process. The bulk shear stress of the solution affects the vortex behavior, and no recirculation is observed at high viscosity.
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