Shape Transition and Propulsive Force of an Elastic Rod Rotating in a Viscous Fluid

by: Bian Qian, Thomas R Powers, Kenneth S Breuer

Physical Review Letters, Vol. 100, No. 7. (2008)

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The deformation of an elastic rod rotating in a viscous fluid is considered, with applications related to flagellar motility. The rod is tilted relative to the rotation axis, and experiments and theory are used to study the shape transition when driven either at constant torque or at constant speed. At low applied torque, the rod bends gently and generates small propulsive force. At a critical torque, the rotation speed increases abruptly, and the rod forms a helical shape with increased propulsive force. We find good agreement between theory and experiment. A simple physical model is presented to capture and explain the essential behavior.

@article{citeulike:2547973, abstract = {The deformation of an elastic rod rotating in a viscous fluid is considered, with applications related to flagellar motility. The rod is tilted relative to the rotation axis, and experiments and theory are used to study the shape transition when driven either at constant torque or at constant speed. At low applied torque, the rod bends gently and generates small propulsive force. At a critical torque, the rotation speed increases abruptly, and the rod forms a helical shape with increased propulsive force. We find good agreement between theory and experiment. A simple physical model is presented to capture and explain the essential behavior.}, author = {Qian, Bian and Powers, Thomas R. and Breuer, Kenneth S. }, citeulike-article-id = {2547973}, doi = {10.1103/PhysRevLett.100.078101}, journal = {Physical Review Letters}, keywords = {2008, rotation}, number = {7}, posted-at = {2008-03-18 00:43:14}, priority = {2}, publisher = {APS}, title = {Shape Transition and Propulsive Force of an Elastic Rod Rotating in a Viscous Fluid}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000100000007078101000001\&idtype=cvips\&gifs=yes}, volume = {100}, year = {2008} }

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TY - JOUR ID - citeulike:2547973 L3 - citeulike-article-id:2547973 TI - Shape Transition and Propulsive Force of an Elastic Rod Rotating in a Viscous Fluid JF - Physical Review Letters VL - 100 IS - 7 PB - APS N2 - The deformation of an elastic rod rotating in a viscous fluid is considered, with applications related to flagellar motility. The rod is tilted relative to the rotation axis, and experiments and theory are used to study the shape transition when driven either at constant torque or at constant speed. At low applied torque, the rod bends gently and generates small propulsive force. At a critical torque, the rotation speed increases abruptly, and the rod forms a helical shape with increased propulsive force. We find good agreement between theory and experiment. A simple physical model is presented to capture and explain the essential behavior. KW - 2008 KW - rotation AU - Qian, Bian AU - Powers, Thomas AU - Breuer, Kenneth PY - 2008/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000007078101000001&idtype=cvips&gifs=yes ER -

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