Regensburg 2019 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 6: Poster I

BP 6.43: Poster

Montag, 1. April 2019, 17:30–19:30, Poster B2

Rayleigh-Plateau-like instability of an active cylindrical cell membrane — •Katharina Gräßel, Christian Bächer, and Stephan Gekle — Universität Bayreuth, Bayreuth, Deutschland

A free liquid jet undergoes a pearling instability, named after Rayleigh and Plateau, that is triggered by the surface tension of the fluid. To account for a biological membrane consisting of the cell cortex underlying a lipid bilayer, the classical model of the Rayleigh-Plateau instability is extended to include bending elasticity of the bilayer as well as anisotropic surface tension, modelling contractile active stresses in the cortex. These extensions lead to alteration of the wavelength of the instability and are confirmed by Lattice-Boltzmann simulations.