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We investigate mixing in a viscoelastic and shear-thinning fluid—a very common combination in polymers and suspensions. We find that competition between elastic and viscous forces generates self-similar mixing, lobe transport, and other characteristics of chaos. The mechanism by which chaos is produced is evaluated both in experiments and in a simple model. We find that chaotic flow is generated by spontaneous oscillations, the magnitude and frequency of which govern the extent of chaos and mixing.
Arratia, Paulo E.; Shinbrot, Troy; Alvarez, Mario M.; and Muzzio, Fernando J., "Mixing of Non-Newtonian Fluids in Steadily Forced Systems" (2005). Departmental Papers (MEAM). 171.
Date Posted: 12 August 2010
This document has been peer reviewed.