Mixing of a wet granular medium: Influence of the liquid addition method

Collet, Romain; Oulahna, Driss; Ryck, Alain de; Jezequel, Pierre Henri; Martin, M.I.

doi:10.1016/j.powtec.2010.08.030

Cited by 11 publications

(13 citation statements)

References 6 publications

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“…or in the viscous term in equation (11). However, the average force, and therefore F 0 , will change with ρ, and d according to equation (3).…”

Section: Influence Of Flow Propertiesmentioning

confidence: 99%

“…In the industrial context, many processes blend powders and grains with liquids. Understanding the mechanisms of the spreading of the liquid is important to avoid lump formation when preparing dough in food industry, but also in the granulation phenomenon to obtain pills in pharmaceutical industry [9], or during the production of slurries for mortar or concrete in building materials [10,11]. During the first stages of the blending, wet areas are in contact with dry flowing grains.…”

Section: Introductionmentioning

confidence: 99%

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Erosion dynamics of a wet granular medium

Lefebvre

Jop

2013

Phys. Rev. E

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Liquid may give strong cohesion properties to a granular medium, and confer a solidlike behavior. We study the erosion of a fixed circular aggregate of wet granular matter subjected to a flow of dry grains inside a half-filled rotating drum. During the rotation, the dry grains flow around the fixed obstacle. We show that its diameter decreases linearly with time for low liquid content, as wet grains are pulled out of the aggregate. This erosion phenomenon is governed by the properties of the liquids. The erosion rate decreases exponentially with the surface tension while it depends on the viscosity to the power -1. We propose a model based on the force fluctuations arising inside the flow, explaining both dependencies: The capillary force acts as a threshold and the viscosity controls the erosion time scale. We also provide experiments using different flowing grains, confirming our model.

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“…or in the viscous term in equation (11). However, the average force, and therefore F 0 , will change with ρ, and d according to equation (3).…”

Section: Influence Of Flow Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Erosion dynamics of a wet granular medium

Lefebvre

Jop

2013

Phys. Rev. E

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“…Every quasi-static shear test was carried out with a dr y or wet granular medium previously mixed in a planetar y mixer from the CAD ® Company (Mlx60) [9][10][11] . This mixer can be used to make a paste, and it allows the power consumption to be recorded at a frequency of 10 points per second.…”

Section: Materials Experimental Set-up and Methodsmentioning

confidence: 99%

“…In a recent work [9][10][11] , we showed that the behaviour of the granular medium during mixing (planetar y mixer) is greatly affected by the granular properties, by the mixer process parameters and by the liquid addition method. We also studied the interparticulate porosity of granular samples removed during mixing, and the effects of particle size.…”

Section: Introductionmentioning

confidence: 99%

“…We also studied the interparticulate porosity of granular samples removed during mixing, and the effects of particle size. Measurements of calcite granular porosities during mixing (with water) showed that the porosity is not constant from the dry to the capillary state [9][10][11] , the capillary state being denser then the funicular state.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Resistance due to Shearing of Partially Wet Granular Media

Oulahna

Collet

Ryck

2013

KONA

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Stretching and rupture of a viscous liquid bridge between two spherical particles

Wang

Huang

et al. 2020

Asia-Pacific J Chem Eng

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In this paper, the stretching and rupture of liquid bridge are studied by experiment and numerical simulation. In the experiment, the relationship between the critical rupture distance of the liquid bridge and four factors, including volume of liquid bridge, particle initial distance, liquid bridge stretching velocity and liquid bridge viscosity, is quantitatively studied. It is found that the liquid bridge critical rupture distance can be described by the modified Bond number, where the critical distance shows a maximum value when this number is about 0.6. As the Capillary number of liquid bridge increases, the effect of the liquid bridge stretching velocity on the critical rupture distance increases, while the influence of the liquid bridge viscosity on the critical rupture distance increases with the volume of liquid bridge. Mesh overset is used to describe the profile change of liquid bridge, and based on the simulation the pressure field is applied in calculating the capillary fore in the liquid bridge. The rupture energy of liquid bridge can be mainly related with the Capillary number, showing two different functions when Ca = 0.01 is the turning point. Finally, two empirical formulas are proposed to predict the rupture energy of liquid bridge.

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Mixing of a wet granular medium: Influence of the liquid addition method

Cited by 11 publications

References 6 publications

Erosion dynamics of a wet granular medium

Erosion dynamics of a wet granular medium

Mechanical Resistance due to Shearing of Partially Wet Granular Media

Stretching and rupture of a viscous liquid bridge between two spherical particles

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