Motion of microobjects in flows - application to fibers, polymers, DNA chains

Hydrodynamic interactions between colloidal particles and polymeric chains are of great interest in chemical, biomedical, and environmental engineering and science. Examples include processes such as sedimentation, flotation, coagulation, deposition, suspension rheology motion of blood cells in an artery or vein, and diffusion in. pores.

The aim of the proposed subject is to introduce and to explore the existing algorithms for computing hydrodynamic interactions between colloidal particles often bounded by the outer walls, e.g. thin films, cylindrical microchannels.

Particles in cylindrical microchannel driven by parabolic flow

Evolution of a force-driven square array of 1000 particles moving in the flat microchannel.

1) A. Mongruel, N. Lecoq, E. Wajnryb, B. Cichocki, F. Feuillebois, Motion of a sphero-cylindrical particle in a viscous fluid in confined geometry, European Journal of Mechanics B/Fluids (2011)

2) Marcin Kędzierski and Eligiusz Wajnryb, Precise multipole method for calculating many-body hydrodynamic interactions in a microchannel, J. Chem. Phys. 133 (2010) 154105-1,11

3) B. Cichocki, E. Wajnryb, J. Bławzdziewicz, J. K. G. Dhont, and P. R. Lang, The intensity correlation function in evanescent wave scattering, .J. Chem. Phys. 132 (2010) 074704-1,12

4) M. Baron, J. Blawzdziewicz, and E. Wajnryb, Hydrodynamic Crystals: Collective Dynamics of Regular Arrays of Spherical Particles in a Parallel-Wall Channel, PRL 100, 174502 (2008)

Contact: dr hab. Eligiusz Wajnryb, ewajnryb@ippt.gov.pl