“…is mainly transferred by conduction across the vapor gap from the substrate, hence cooling down the underlying liquid bath. Such a local cooling, exacerbated by poor thermal conductivity of the substrate [33], could be responsible for the direction of circulation observed in the case of an ethanol drop both by potentially giving rise to a sinking buoyant plume of cooler (hence heavier) liquid beneath the drop, and by means of a surface-tension gradient (Marangoni stresses) directed inwards along the bath surface (towards a cooler spot under the drop, where the surface tension, a decreasing function of temperature, is higher). Although the direction of the Marangoni stresses immediately underneath the drop is a priori less obvious (due to a stronger cooling expected at the neck, the location of the most intense evaporation [33]), we shall confirm later on that the aforementioned inward tendency is overall predominant for the Marangoni contribution.…”