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Instability and pattern formation in colloidal-suspension Taylor-Couette flow.

A theory of Taylor-Couette flow in colloidal crystals formed from suspensions of highly charged, poorly screened particles is presented. We show that the usual Taylor instability is suppressed and two new types of instability emerge at low shear rates. These can lead to pattern formation and can form vertical striped phases. The results are discussed in light of the experiments of Weitz, Dozier, and Chaikin [J. Phys. (Paris) Colloq. 46, C3-257 (1985)] and possible light-scattering experiments are analyzed