Stirring by blinking rotlets in a bounded Stokes flow

Abstract

A blinking rotlet model is used for the analysis of stirring in a Stokes flow in a rectangular domain. After the two-dimensional biharmonic equation is solved analytically, the associated velocity field of a pair of blinking rotlets positioned symmetrically on the y -axis, is used studying the stirring qualities of this blinking rotlet model. Contour kinematic simulations are performed in order to obtain information about the chaotic behaviour of a blob of passive tracer material put in this flow field