High Shear Rheology on an MCR MultiDrive: Extending Characterization Beyond What is Possible on a Conventional Rheometer with Only a Single Motor
Better understanding of high-shear-rate flows is critical for several industrial applications. In this report, high shear rheology of complex fluids is explored using gap-dependent measurements on a parallel plate geometry. This was completed using the counter-rotation mode on the MCR with an additional lower rotational drive. Shear rates in excess of 100000 s⁻¹ were achieved
Many applications, such as flow through porous media, spraying nozzles, microfluidic flow cells, food product processing, atomization etc., involve complex fluids undergoing high shear rates[1, 2, 3]. Hence a better understanding of rheological behavior under high-shear-rate conditions becomes critical to developing new applications and processes which involve such high-shear-rate flows. Characterization of viscoelastic fluids at high shear rates (especially greater than 104 s-1) have always been challenging on standard rheometric configurations where there are limits in terms of how high the shear rate can go.
In this report, gap-dependent measurements on a parallel plate are investigated in detail on a MultiDrive Rheometer, which combines two rotational drives in one instrument.
1) Davies, G.A. et al., “Thin film and high shear rheology of multiphase complex fluids”, J. Non-Newtonian Fluid Mech. 148 (2008) 73–87.
2) Clasen, C. et al., "Gap-dependent microrheometry of complex liquids", J. Non-Newt. Fluid Mech. 124 (2004) 1–10.
3) Larson, R. G. The structure and rheology of complex fluids. Oxford University Press, New York, (1999)
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