Dresden 2017 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 45: Microswimmers (joint session BP/DY)

DY 45.6: Talk

Thursday, March 23, 2017, 12:30–12:45, ZEU 250

Interaction of 3D amoeboid swimmer with a wall — •Mohd Suhail Rizvi, Alexandr Farutin, and Chaouqi Misbah — Université Grenoble Alpes, LIPHY, CNRS, F-38000 Grenoble, France

Several micro-organisms and eukaryotic cells, including those of immune system, are known to migrate in fluids with the help of the appendages (flagella or cilia) or by deforming their body, known as amoeboid swimming. We performed a numerical study of the interaction of a three dimensional amoeboid swimmer with a plane boundary using boundary integral method. Expectedly, for purely hydrodynamic interactions, the swimmer nature is dependent on its separation and orientation relative to the wall but shows two contrasting behaviors as it either gets attracted towards the wall or moves away from it depending on its configuration. We identify the regions in the phase space associated with these two contrasting behaviors and demonstrate that the navigational motion of an amoeboid swimmer in a confined region observed in 2D also persist in 3D. In the presence of the adhesive interaction (modeled using Lennard-Jones potential) between swimmer and the wall along with hydrodynamic, the swimmer velocity demonstrates a non-monotonic relationship with the adhesion strength by demonstrating fastest migration at moderate adhesion and thus recapitulates experimental observations.