Periodic orientational motions of rigid liquid-crystalline polymers in shear flow.

摘要: The collective periodic motions of liquid-crystalline polymers in a nematic phase shear flow have, for the first time, been simulated at particle level by Brownian dynamics simulations. A wide range parameter space has scanned varying aspect ratio L/D between 10 and 60 three different scaled volume fractions an extensive series rates. influence start configuration box on final motion also studied. Depending these parameters, director is either characterized as tumbling, kayaking, log-rolling, wagging, or flow-aligning. periods kayaking wagging are given T=4.2(L/D)–1 high ratios. Our simulation results agreement with theoretical predictions recent experiments fd viruses solution. These calculations elongated rigid rods have become feasible newly developed event-driven algorithm.