SKM 2023 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 45: Poster: Nonlinear Dynamics, Pattern Formation and Networks

DY 45.7: Poster

Donnerstag, 30. März 2023, 13:00–16:00, P1

(Broken) gradient-dynamics description of reactive thin liquid films — •Florian Voß, Fenna Stegemerten, and Uwe Thiele — Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 9, 48149 Münster, Germany

After reviewing the gradient dynamics formulation of chemical reactions, applied e.g. in [1] to reacting phase-separating systems, we apply the concept to thin liquid films and shallow drops that are either covered by reactive surfactants [2] or react with the solid substrate [3]. Next we discuss how the breaking of the variational form by imposed fluxes results in intricate spatio-temporal dynamics of the film/drop and reactant density profiles. As an example we consider a simple model for oscillatory behaviour in droplets of slime mould.

[1] D. Zwicker, Current Opinion in Colloid & Interface Science, 61, 101606 (2022),

[2] A. Pereira, P. M. J. Trevelyan, U. Thiele, and S. Kalliadasis, Phys. Fluids 19, 112102 (2007),

[3] K. John, M. Bär, and U. Thiele, Eur. Phys. J. E 18, 183 (2005).