title: Modeling a spheroidal microswimmer and cooperative swimming in a narrow slit.
abstract: We propose a hydrodynamic model for a spheroidal microswimmer with two tangential surface velocity modes. This model is analytically solvable and reduces to Lighthill's and Blake's spherical squirmer model in the limit of equal major and minor semi-axes. Furthermore, we present an implementation of such a spheroidal squirmer by means of particle-based mesoscale hydrodynamics simulations using the multiparticle collision dynamics approach. We investigate its properties as well as the scattering of two spheroidal squirmers in a slit geometry. Thereby we find a stable fixed point, where two pullers swim cooperatively forming a wedge-like conformation with a small constant angle.
authors.affiliation: Theoretical Soft Matter and Biophysics, Institute for Advanced Simulation and Institute of Complex Systems, Forschungszentrum Jülich, D-52425 Jülich, Germany. m.theers@fz-juelich.de g.gompper@fz-juelich.de r.winkler@fz-juelich.de.
authors.forename: Mario
authors.initials: M
authors.lastname: Theers
authors.forename: Elmar
authors.initials: E
authors.lastname: Westphal
authors.forename: Gerhard
authors.initials: G
authors.lastname: Gompper
authors.forename: Roland G
authors.initials: RG
authors.lastname: Winkler