title: Stokesian dynamics of pill-shaped Janus particles with stick and slip boundary conditions.
abstract: We study the forces and torques experienced by pill-shaped Janus particles of different aspect ratios where half of the surface obeys the no-slip boundary condition and the other half obeys the Navier slip condition of varying slip lengths. Using a recently developed boundary integral formulation whereby the traditional singular behavior of this approach is removed analytically, we quantify the strength of the forces and torques experienced by such particles in a uniform flow field in the Stokes regime. Depending on the aspect ratio and the slip length, the force transverse to the flow direction can change sign. This is a novel property unique to the Janus nature of the particles.
authors.affiliation: Department of Mechanical Engineering, National University of Singapore, Singapore 119260.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Sun
authors.forename: Evert
authors.initials: E
authors.lastname: Klaseboer
authors.forename: Boo Cheong
authors.initials: BC
authors.lastname: Khoo
authors.forename: Derek Y C
authors.initials: DY
authors.lastname: Chan