Influence of internal friction on transport properties in sheared granular flows

Hsiau, Shu San; Shiu, J. Y.; Yang, Wen Lung; Li, Lu

doi:10.1002/aic.10977

Cited by 7 publications

(6 citation statements)

References 29 publications

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“…The kinetic energy is mainly transmitted through the interactions between particles in granular materials therefore the granular temperature is higher in the liquid-like region (in the upper channel) because of the greater shear rate but lower in the uniform region (in the lower channel). The granular temperature increases with the increasing scaled height due to the stronger interactive collisions in the upper channel (Hsiau and Shieh, 1999;Hsiau et al, 2006). The granular temperature is the highest in the dry system because the particles interactions are the strongest with the smallest viscous force.…”

Section: Resultsmentioning

confidence: 95%

“…In dense-gas kinetic theory, the granular temperature is assumed isotropic distributed. However, most experimental studies show that the granular temperature distributions are anisotropic because of inelastic collisions, cohesive force effects and friction effects (Campbell, 1990;Hsiau et al, 2006;Yang and Hsiau, 2006). Fig.…”

Section: Resultsmentioning

confidence: 98%

“…The transport properties of sheared granular flows were mostly studied in a dry system, where interstitial fluid is air (Buggish and Löffelmann, 1989;Campbell, 1997;Hsiau and Yang, 2002;Hsiau et al, 2006). Hsiau et al (2006) indicated that the shear rates and fluctuation velocities increased with the decreasing internal friction coefficient of granular materials. They also showed that the granular flow with rougher particles has higher energy dissipation, resulting in the smaller self-diffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

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Influence of interstitial fluid viscosity on transport phenomenon in sheared granular materials

Liao

Hsiau

2009

Chemical Engineering Science

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Influence of interstitial fluid viscosity on transport phenomenon in sheared granular materials

Liao

Hsiau

2009

Chemical Engineering Science

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“…The flow pattern inside a specific system is affected by a significant number of factors such as the operating conditions [20,[23][24][25], e.g., rotational velocity, filling level, etc., or particle properties [26][27][28][29][30][31], e.g., particle size, repose angle, internal friction angle, cohesivity, etc., [32][33][34]. The absence of designing easy equipment that produces 3D experiments that give complete results considering all the mentioned factors prevent the acquisition of adequate data that provide a basic conception of solid mixing behavior when compared with liquid mixing behavior.…”

Section: Introductionmentioning

confidence: 99%

Mixing of Powders Inside a Cyclic Shear Mixing Device: A Parametric Analysis

Quiñones¹,

Valencia²,

Forero³

2019

JESTR

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Although the mixture of powders in recent years has been studied with great progress, there are still a lot of parameters to consider that make it difficult to have a complete understanding. In this work, powder mixing was studied inside a simple shear mixing device consisting of a small container with two moving walls and three static walls. The aim is to obtain a basic knowledge of the internal behavior of granular materials in the surface and the height direction of the device as a function of the particle size, filling level and disturbance of the wall velocity. Results reveal that on the surface of the cavity when velocities of the moving wall are about 9 cm/s two zones are created, a high-speed zone and a low-speed zone. The width of the high-speed zone of flow is approximately 9 to 11 times the average particle size. A difference in density of 0.1 g/cm3 has no significant effect on the movement of the particles from the bottom to the top. Reasons point out to the high shear stress applied by the moving walls.

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“…The transport properties of sheared granular flows were widely studied in a dry system, where the interstitial fluid is air [1,[3][4][5][6][7]. Hsiau et al [7] indicated that the shear rates and fluctuation velocities increased with the decreasing internal friction coefficient of granular materials. They also showed that the granular flow with rougher particles has higher energy dissipation, resulting in the smaller self-diffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

Influence of Interstitial Fluid Viscosity on Transport Phenomenon in Sheared Granular Materials

Liao

Hsiau

2009

AIP Conference Proceedings

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We report experimental measurements of transport properties on sheared granular materials with different interstitial fluids to study the granular flow behaviors. Four kinds of interstitial fluids are used in the experiments. The ensemble velocities, local shear rates, fluctuation velocities, and self-diffusion coefficients are successfully measured by PTV method. The results indicate that the interstitial fluid plays an important role in determining the transport properties of the granular flow. The particles motions are more random and interactive collisions are more serious in a dry system (interstitial fluid of air). The values of fluctuations are smaller as the interstitial fluid is more viscous resulting in the larger viscous drag force. The thickness of shear band is about three to eight particle diameters and increases with the decreasing of the interstitial fluid viscosity. The self-diffusion coefficient of granular materials is also discussed in this study.

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Influence of internal friction on transport properties in sheared granular flows

Cited by 7 publications

References 29 publications

Influence of interstitial fluid viscosity on transport phenomenon in sheared granular materials

Influence of interstitial fluid viscosity on transport phenomenon in sheared granular materials

Mixing of Powders Inside a Cyclic Shear Mixing Device: A Parametric Analysis

Influence of Interstitial Fluid Viscosity on Transport Phenomenon in Sheared Granular Materials

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