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A new model for contact angle hysteresis

PDE and Applied Math Seminar

Speaker: Natalie Grunewald, UCLA
Location: 1147 MSB
Start time: Thu, Jan 24 2008, 11:00AM

We introduce a new, rate independent model for contact angle hysteresis, which is based on models used in elasto plasticity. It describes a stable drop configuration not only as an energy minimizer but as a state where the energy landscape is not too steep. The new model is applied to drops on a rough surface. It qualitatively reproduces experiments which show a non monotone and discontinuous dependence of the contact angles on the surface roughness.