Jeffery’s orbit

Polymer processing involves shear flow as well as simple extensional flow. Shear flow is a more complex arrangement with a three-dimensional nature to it (Fig. 3.6) and a weak extensional flow component. Rigid rods in a viscous fluid were first considered theoretically by Jeffery (1922). Jeffery showed that objects exhibited a trajectory often called a Jeffery s orbit which rotated the axis of the... 

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