Berlin 2018 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 15: Postersession III
BP 15.59: Poster
Dienstag, 13. März 2018, 14:00–16:00, Poster B
Hydrodynamic mobility functions near elastic interfaces — •Abdallah Daddi-Moussa-Ider1, Maciej Lisicki2, and Stephan Gekle3 — 1Institut für Theoretische Physik II: Weiche Materie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, Düsseldorf 40225, Germany — 2DAMTP, University of Cambridge, Wilberforce Rd, Cambridge CB3 0WA, United Kingdom — 3Biofluid Simulation and Modeling, Fachbereich Physik, Universität Bayreuth, Universitätsstraße 30, Bayreuth 95440, Germany
Elastic confinements are an important component of many biological systems and dictate the transport properties of suspended particles in a viscous flow. Using a fully analytical theory, we study the Brownian motion of a spherical particle moving in close vicinity of a living cell whose membrane is endowed with a resistance towards shear and bending. The analytical calculations proceed through the computation of the frequency-dependent mobility functions and the application of the fluctuation-dissipation theorem. Elastic interfaces endow the system with memory effects that lead to a long-lasting anomalous subdiffusive regime of nearby particles. The analytical predictions are validated and complemented with boundary-integral simulations.
References:
A. Daddi-Moussa-Ider and S. Gekle. Phys. Rev. E 95, 013108 (2017)
A. Daddi-Moussa-Ider, M. Lisicki, S. Gekle. Phys. Rev. E 95, 053117 (2017)
A. Daddi-Moussa-Ider, M. Lisicki, S. Gekle. Phys. Fluids 29, 111901 (2017)