Results 321 to 330 of about 244,315 (370)
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Slip length and drag reduction of superhydrophobic surfaces in shear-thinning fluid flows.
Journal of Colloid and Interface ScienceHYPOTHESIS We hypothesise that superhydrophobic surfaces can achieve effective interfacial slip and drag reduction even under non-Newtonian, shear-thinning fluid flows.
Linsheng Zhang +4 more
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The rising velocity of a slowly pulsating bubble in a shear-thinning fluid
The Physics of Fluids, 2019We study the rising motion of small bubbles that undergo contraction, expansion, or oscillation in a shear-thinning fluid. We model the non-Newtonian response of the fluid using the Carreau-Yasuda constitutive equation, under the assumptions that the ...
M. De Corato +2 more
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Self-diffusiophoretic propulsion of a spheroidal particle in a shear-thinning fluid
Journal of Fluid MechanicsShear-thinning viscosity is a non-Newtonian behaviour that active particles often encounter in biological fluids such as blood and mucus. The fundamental question of how this ubiquitous non-Newtonian rheology affects the propulsion of active particles ...
Guangpu Zhu +4 more
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Flow around a squirmer in a shear-thinning fluid
Journal of Non-Newtonian Fluid Mechanics, 2018Many biological fluids display shear-thinning rheology, where the viscosity decreases with an increasing shear rate. To better understand how this non-Newtonian rheology affects the motion of biological and artificial micro-swimmers, recent efforts have ...
Kyle Pietrzyk +5 more
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Lattice Boltzmann Simulation of Shear-Thinning Fluids
Journal of Statistical Physics, 2005zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Pressure-Oscillatory Defoaming for Shear-thinning Fluids
KAGAKU KOGAKU RONBUNSHU, 2007筆者らは，圧力振動場を用い，Shear-thinning性流体中の気泡上昇速度を促進させる方法を検討した．気泡が意図的に膨張・縮小するよう機械的に圧力振動させると，気泡近傍に強い局所剪断流れが生じる．その際，気泡近傍の局所剪断粘度は低下し，気泡上昇速度は促進される．この方法により，Shear-thinning性流体では，自然上昇速度と比較して，400倍を超える気泡上昇速度が得られた．一方，Newton流体では，促進効果はほとんど得られなかった．気泡近傍の剪断粘度を実験的に評価するため，ビデオとストロボスコープを用い，気泡径の時系列変化を調べた．ここで得られた剪断粘度低下から推算した促進効果は，実測値と良好に一致した．
Shuichi Iwata +3 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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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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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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Soft lubrication of model shear-thinning fluids
Tribology International, 2020Abstract Model non-Newtonian fluids are used to determine the influence of fluid rheology on friction between viscoelastic substrates. We uniquely designed two groups of fluids to be iso-viscous at low- and high-shear rate respectively using nanocellulose dispersions.
Xu, Yuan, Stokes, Jason R.
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