High shear rheology of shear banding fluids in microchannels

Nghe, Philippe; Degré, Guillaume; Tabeling, Patrick; Ajdari, Armand
November 2008
Applied Physics Letters;11/17/2008, Vol. 93 Issue 20, p204102
Academic Journal
We characterize heterogeneous flows of a wormlike micelles solution in microchannels. Combining a pressure resistant microfabrication technology and a performant particle image velocimetry setup, we succeed in determining the nonlinear rheology of this fluid over 4 decades in shear rate and in particular more than 1 decade beyond the end of the stress plateau. We performed an independent measurement of the slip length with 1 μm resolution.


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