Shear Banding Driven by Electric Field and Shear Flow

doi:10.1088/0256-307X/30/9/094701

Chin. Phys. Lett.

2013, Vol. 30

Issue (9): 094701 DOI: 10.1088/0256-307X/30/9/094701

FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS)

Shear Banding Driven by Electric Field and Shear Flow

ZHENG Jie, FU Wei-Juan, ZHOU Lu-Wei^**

State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai 200433

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ZHENG Jie, FU Wei-Juan, ZHOU Lu-Wei 2013 Chin. Phys. Lett. 30 094701

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Abstract The shear banding is explored in a granular suspension driven by electric field and shear flow. We find that, given an imposed electric field, there is a critical shear rate determining whether shear banding emerges. A phase diagram of shear banding and fluidization is constructed by using the present experimental data. The evolution in different shear banding phases constitutes an apparent shear thinning phenomenon, probably reflecting an underlying perspective of shear banding. Using the two-phase model, combining with mean field approach and the Onsager least dissipation principle, we give a qualitative explanation of our experimental findings. The results suggest that the stress heterogeneity plays a crucial role for the physical origin of shear banding in this system.

Received: 22 April 2013 Published: 21 November 2013

PACS:	47.57.Qk	(Rheological aspects)
	47.65.Gx	(Electrorheological fluids)
	83.10.Tv	(Structural and phase changes)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/30/9/094701 OR https://cpl.iphy.ac.cn/Y2013/V30/I9/094701

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