Fig 5. Time courses for a microparticle’s velocity components (top panel) and vertical coordinate of its center of mass (bottom panel) obtained from computer simulation for a sphere in a shear flow of 100 /s.
Top panel: blue lines correspond to translational velocity of a microparticle Vx, red—vertical (lift) velocity Vy. Solid, dashed and dotted lines—respectively correspond to flat, rough 1 and rough 2 surfaces. Bottom panel: blue, green and red solid lines correspond to flat, rough 1 and rough 2 surfaces; dashed lines are linear fits to the simulation results of the particle’s center during the timespan from 200 to 500 ms. Initial position of particle in this case h0 = 1.5 μm, x0 = 5 μm.