Results 221 to 230 of about 12,948 (263)
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The rise of bubbles in shear thinning viscoelastic fluids
Journal of Colloid and Interface Science, 2022Bubbles in a liquid rise under gravity and separate to the top. Bubbly liquids exist commonly in nature and play a significant role in energy-conversion, oil and chemical industries. Therefore, understanding how bubbles rise is of great importance. Rheological properties of the fluid have a strong impact on single bubble rise and have been shown to ...
Q, Chen +3 more
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Structuring Sedimentation in a Shear-Thinning Fluid
Physical Review Letters, 2005We study the sedimentation of suspensions of monodisperse non-Brownian particles in a shear-thinning polymeric fluid. We observe the formation of particle-rich structures and show that they are associated with a well-defined flow pattern. The results suggest that the observed structuring is a consequence of particle aggregation that amplifies ...
Mora, S., Talini, L., Allain, C.
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Time-Periodic Mixing of Shear-thinning Fluids
Chemical Engineering Research and Design, 2004Mixing times and energy consumption of inelastic shear-thinning fluids in stirred vessels were experimentally investigated using time-periodic conditions. The impeller rotated initially at a speed sufficient to allow the well-mixed region around the impeller to be formed and then the impeller was stopped and turned on periodically.
G. Ascanio, S. Foucault, P.A. Tanguy
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Viscous fingering in a shear-thinning fluid
Physics of Fluids, 2000We study the Saffman–Taylor instability in a rectangular Hele-Shaw cell. The driven fluid is a dilute (or semidilute) polymer solution, with a viscosity that exhibits shear thinning. Other non-Newtonian properties such as elastic effects are negligible under the present experimental conditions; the system thus allows for separate investigation of the ...
Lindner, Anke +2 more
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Optimal Control of Shear-Thinning Fluids
SIAM Journal on Control and Optimization, 2012The aim of this paper is to establish necessary optimality conditions for optimal control problems governed by steady, incompressible Navier--Stokes equations with shear-dependent viscosity. The main difficulty is related to the differentiability of the control-to-state mapping and is overcome by introducing a family of smooth approximate control ...
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Dynamic wetting of shear thinning fluids
Physics of Fluids, 2007The impact of non-Newtonian behavior on dynamic wetting is critical since many fluids exhibit such behavior somewhere in the high-shear environment inherent in the wedge flow near a moving contact line. This impact will be different for two broad categories of non-Newtonian behavior, shear thinning, and elasticity.
Seevaratnam, G. K. +4 more
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The Dean instability for shear-thinning fluids
Journal of Non-Newtonian Fluid Mechanics, 2013We investigate the Dean instability for a generalised Newtonian fluid which satisfies an approximately power-law viscosity model, albeit modified to incorporate a low-shear Newtonian plateau. Infinite aspect ratio linear stability results are presented for both a narrow-gap width and a finite radius of curvature.
Haines, Philip Edward +2 more
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Nonlinear Electrophoresis of Microparticles in Shear Thinning Fluids
LangmuirThe nonlinear electric field dependence of particle electrophoresis has been demonstrated to occur in Newtonian fluids for highly charged particles under large electric fields. It has also been predicted to arise from the rheological effects of non-Newtonian fluids even at small electric fields.
Joseph Bentor +3 more
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Chaotic mixing of shear‐thinning fluids
AIChE Journal, 1994AbstractThis article investigates the effect of shear‐thinning viscosity on chaotic mixing when the kinematics first begin to deviate from Newtonian flow. Computations are done for a 2‐D, time‐periodic flow between eccentric cylinders. The effectiveness of mixing is analyzed by examining the asymptotic coverage of a passive tracer, character and ...
Thomas C. Niederkorn, Julio M. Ottino
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