Theory of swimming filaments in viscoelastic media
Theory of swimming filaments in viscoelastic media
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DOI：
10.1103/physrevlett.99.258101
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发表时间：
2007-12-21
影响因子：
8.6
通讯作者：
Wolgemuth, Charles W.
中科院分区：
文献类型：
--
作者：
Fu, Henry C.;Powers, Thomas R.;Wolgemuth, Charles W.
出于我们想要了解精子在雌性哺乳动物生殖道非牛顿流体中游泳的生物物理机制的动机，我们研究了非线性粘弹性上对流麦克斯韦模型中细丝的游泳。我们获得了施加在具有规定跳动模式的无限长圆柱体上的游动速度和水动力。我们利用这些结果来检查精子鞭毛的简化滑动丝模型的游动。粘弹性往往会降低游泳速度，并且由于粘弹性而引起的跳动模式的变化可以逆转游泳方向。
Motivated by our desire to understand the biophysical mechanisms underlying the swimming of sperm in the non-Newtonian fluids of the female mammalian reproductive tract, we examine the swimming of filaments in the nonlinear viscoelastic upper convected Maxwell model. We obtain the swimming velocity and hydrodynamic force exerted on an infinitely long cylinder with prescribed beating pattern. We use these results to examine the swimming of a simplified sliding-filament model for a sperm flagellum. Viscoelasticity tends to decrease swimming speed, and changes in the beating patterns due to viscoelasticity can reverse swimming direction.