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Interfacial responses to mechanical forcing

Emilie Dressaire Dept. of Mechanical and Aerospace Engineering, NYU Polytechnic School of Engineering

Interfaces strongly influence the properties of multiphasic systems and the ability to tune the response of an interface can lead to important applications in industrial processes (material processing, liquid transportation, foam generation, etc.). In this seminar, I will present two examples of recent work showing how mechanical forcing can control the shape of an air/liquid interface.

The first part of this seminar will focus on the wetting of fibers by a small volume of liquid and demonstrate the influence of mechanical parameters on the resulting capillary bridge between the fibers. In particular, I will show that the possibility to tune the morphology is interesting to control the drying of fibrous media. In the second part of the talk, I will consider the influence of a liquid foam on sloshing, which occurs when a partially filled container is set in motion. This mechanical forcing occurs both in everyday life situations and during the transport of liquids. Our study indicates that the addition of foam at an air/liquid interface can be used to passively damp the sloshing, i.e. the oscillation of the interface, and to avoid the spilling of the liquid.