Regensburg 2010 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 13: Granular Matter/ Contact Dynamics II

DY 13.4: Vortrag

Mittwoch, 24. März 2010, 10:30–10:45, H47

Networks of Wet Elastic Cylinders — •Ohle Claussen, Martin Brinkmann, and Stephan Herminghaus — MPI for Dynamics and Self-Organization Göttingen, Germany

Liquid bridges held between two cylindrical surfaces exert not only capillary forces onto the wetted bodies, they also induce torques. Depending on the tilt angle and separation of the surfaces, and controlled by the liquid volume or pressure a variety of liquid equilibrium shapes can be observed. Some of these liquid structures exert aligning torques which have an impact on the structure and mechanical behaviour of disordered networks of cylindrical fibres. We present numerical studies of the liquid morphologies arising in systems of macroscopic cylinders, as well as simulations of random elastic fibre networks based on an effective sliding bond model to account for the effect of capillary bridges. The growth of pores in such a network is investigated, and an alternative lattice gas model is presented to motivate the applicability of the effective model.