title: Vortex pairs in viscoelastic Couette-Taylor flow.
abstract: In experiments on dilute polymers between rotating cylinders Groisman and Steinberg [Phys. Rev. Lett. 78, 1460 (1997)] observed the formation of vortices that were not equidistantly spaced but rather paired up in what they called "diwhirls." We calculate these states within an Oldroyd-B model with parameters adapted to the experiment and find good agreement with the observed characteristics of the diwhirls.
authors.affiliation: Fachbereich Physik, Philipps Universität Marburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Lange
authors.forename: B
authors.initials: B
authors.lastname: Eckhardt