Mixing of granular materials, part II: effect of particle size under periodic shear

Quiñones, Luis Obregón; Jiménez, Álvaro; Velázquez, Carlos

doi:10.1016/j.powtec.2010.03.006

Cited by 17 publications

(15 citation statements)

References 30 publications

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“…Since the free surface is open to air, the particles experienced zero friction from above. In the case of coarse particles, the smaller frictional area (particle-particle of contact) leads to a weaker total friction under the particles when compared to fine particles [46]. This weaker total frictional drag helps the larger particle to move on the free surface faster than the fine particles.…”

Section: Effect Of Particle Sizementioning

confidence: 99%

Characterization of transverse mixing in a screw mixer by image analysis

et al. 2015

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Transverse mixing of particles in a screw mixer is investigated by a digitized image analysis method coupled with solidification technique. The effects of screw rotation speed, filling level and particle size on the transverse mixing index and mixing rate constant are investigated experimentally. The results show that a decrease of screw rotation speed and filling level results in an increase in the mixing rate. Faster mixing is observed with large particles, and the mixing rate constant of coarse particles is 1.5~2 times higher than that of fine particles. Particle size difference of materials puts the particles at a risk of segregation.

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Section: Effect Of Particle Sizementioning

confidence: 99%

Characterization of transverse mixing in a screw mixer by image analysis

et al. 2015

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“…Drying is a unitary operation of great importance used in industries of different fields worldwide in sectors such as pharmaceutical [1], chemical [2], metallurgical [3], food [4], ceramics [5], agriculture [6], among others. Although the drying process is already established in most dryers, research is still being donemake optimization of the equipment to get better results in the process.…”

Section: Introductionmentioning

confidence: 99%

CFD analysis of a continuous powder dryer with inclined metal sheets

Quiones¹,

Prez²,

Salgado³

2018

IJCTR

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A continuous powder dryer of inclined metal sheets was designed and simulated using computational fluid dynamics. This dryer suggests an alternative for the drying of lactose in the pharmaceutical and food industry where there are high control requirements for moisture content. The dryer was designed to process the granular material over a wide range of particle sizes. The dryer dimensions are calculated by the particle entrainment theory to obtain the terminal particle velocity. CFD simulations were performed by feeding the air in the front and the back of the metal sheets with inclination angles of 40°, 50°, and 60° angles.The results of these simulations indicate that the velocity profiles with the best contact air-solid were obtained using the configuration of 60° inclination angle.

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“…In general dryers are equipment commonly used to remove water or certain solvents from powders such as those used in industries such as pharmaceutical [1], chemical [2], metallurgical [3], food [4], ceramics [5], agriculture [6], among others. Most of them use a continuous flow of gas to disperse the particles through a confined space to increase the surface area of contact increasing as well the drying.…”

Section: Introductionmentioning

confidence: 99%

Design, construction, and start-up of an inclined sheet continuous powder dryer

Salgado¹,

Perez²,

Quiñones³

et al. 2018

ces

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It was designed a continuous powder dryer of inclined metal sheets that is an alternative for the drying of lactose in the pharmaceutical and food industry where there are high control requirements for moisture content. However, the dryer can be used to dry any type of wet solid. The dryer was designed to process the granular material over a wide range of particle sizes. The air velocity used in the experiments were lower terminal particle velocity to avoid particle drag. The experiments were compared with CFD simulations. The results of the simulations helped to explain the results obtained experimentally. The best contact air-solid were obtained using the configuration of 60° inclination angle. With this arrangement, the air reduces the loss of energy caused by the sheet friction maintaining its high velocity.

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Mixing of granular materials, part II: effect of particle size under periodic shear

Cited by 17 publications

References 30 publications

Characterization of transverse mixing in a screw mixer by image analysis

Characterization of transverse mixing in a screw mixer by image analysis

CFD analysis of a continuous powder dryer with inclined metal sheets

Design, construction, and start-up of an inclined sheet continuous powder dryer

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