Hydrodynamic lift of a moving nano-rod at a wallC. Sendner and R. R. Netz
Physics Department, Technical University Munich - 85748 Garching, Germany
received 30 January 2007; accepted in final form 12 July 2007; published September 2007
published online 6 August 2007
The hydrodynamic lift of a nano-rod that is pulled parallel to a wall is studied using hydrodynamic simulations and scaling arguments at finite temperature in the zero-Reynolds number limit. The no-slip wall gives rise to a hydrodynamic torque and partial rod orientation, which in turn induces a long-ranged hydrodynamic repulsion away from the wall. At high temperatures, the lift force depends quadratically on the pulling force and decays inversely with the square of the separation from the surface.
87.15.-v - Biomolecules: structure and physical properties .
47.15.G- - Low-Reynolds-number (creeping) flows .
83.10.Mj - Molecular dynamics, Brownian dynamics .
© Europhysics Letters Association 2007