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Title: Dynamics of red blood cells and vesicles in microchannels of oscillating width. Author: Braunmüller S, Schmid L, Franke T. Journal: J Phys Condens Matter; 2011 May 11; 23(18):184116. PubMed ID: 21508467. Abstract: We have studied the dynamics of red blood cells and fluid lipid vesicles in hydrodynamic flow fields created by microchannels with periodically varying channel width. For red blood cells we find a transition from a regime with oscillating tilt angle and fixed shape to a regime with oscillating shape with increasing flow velocity. We have determined the crossover to occur at a critical ratio L(y)/v(m) ≈ 2.2 × 10⁻³ s with channel width L(y) and red blood cell velocity v(m). These oscillations are superposed by shape transitions from a discocyte to a slipper shape at low velocities and a slipper to parachute transition at high flow velocities.[Abstract] [Full Text] [Related] [New Search]