The use of the photogrammetric method for measurement of the repose angle of granular materials

Wójcik, Artur; Klapa, Przemysław; Mitka, Bartosz; Sładek, Jerzy

doi:10.1016/j.measurement.2017.10.005

Cited by 34 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An appropriate quantity of sample powder was introduced through the funnel, allowing it to descend directly onto the horizontal surface positioned beneath the funnel. This process led to the formation of a powder heap on the horizontal plane, and the flowability of the powder was subsequently evaluated by measuring the angle formed between the inclined height and the base of the conical pile. , …”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Microfluidic Crystallization for Screening of Spherical Particles of Pyraclostrobin

Zhong,

Guo,

Bao

2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The semicontinuous antisolvent crystallization process of pyraclostrobin was investigated utilizing an integrated microfluidic device that encompasses both microfluidic channels and an agitated crystallizer. We successfully regulated the crystal morphology as quasi-spherical particles and narrowed the particle size distribution compared with that of the raw materials. We explored the impact of ultrasound powers, initial concentration, antisolvent content, and stirring rate on crystal morphology. Our innovative approach involves precisely manipulating the stirring rate and solvent content, resulting in diverse crystal morphologies. Notably, we unveil two distinct mechanisms governing the formation of spherical particles, which can be attributed to the variability in the oil droplet sizes. Our apparatus and approach enable the efficient screening of spherical particles, advocating minimal reagent consumption. This achievement holds the potential to be scaled across a variety of fields ranging from pharmaceuticals to material science.

show abstract

Section: Methodsmentioning

confidence: 99%

“…This process led to the formation of a powder heap on the horizontal plane, and the flowability of the powder was subsequently evaluated by measuring the angle formed between the inclined height and the base of the conical pile. 40,41…”

Section: Experimental Methodsmentioning

confidence: 99%

Microfluidic Crystallization for Screening of Spherical Particles of Pyraclostrobin

Zhong,

Guo,

Bao

2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Piling, pouring, emptying and slowly rotating in a drum leads to the determination of the static angle of repose. The dynamic angle of repose may be obtained in a rotary drum at higher rotational speeds [50]. Each of these methods in a way influences the resulting angle of repose.…”

Section: Static and Dynamic Angle Of Repose Testmentioning

confidence: 99%

DEM Investigation of the Influence of Particulate Properties and Operating Conditions on the Mixing Process in Rotary Drums: Part 1—Determination of the DEM Parameters and Calibration Process

et al. 2020

View full text Add to dashboard Cite

This paper’s goal was to select methods and a calibration procedure which would lead to the determination of relevant parameters of a discrete element method (DEM) and virtual material creation. Seven particulates were selected with respect to their shape (spherical and non-spherical), size and density. The first calibration experiment involved “packing test” to determine the shape accuracy and bulk density of virtual packed particulates. The series of simulations were compared with real experiments, and the size, shape and density of virtual particles were optimized. Using three apparatuses, the input parameter values were experimentally determined for a contact model that defines the behavior of particulates in DEM simulations. The research part of the paper examines the influence of factors such as particle number; pile formation method; and the method of evaluation of the angle of repose on the process of the calibration of virtual material. The most reproducible results were achieved by the “pilling” method and by the rotating drum—both evaluated by the geometric method. However, it is always advisable to make an overall visual comparison of the slope shape between the calibration simulation and the experimental curves. The bowl’s diameter to particle size ratio should be greater than 25, and the calibration experiment should contain approximately 4000 particles to ensure representative results during angle of repose calibration experiment.

show abstract

“…In addition, according to the powder mechanics, the repose angle of the falling powder on the plane is also related to the process [30][31][32][33].…”

Section: Repose Anglementioning

confidence: 99%

A New Coking Coal Charging Method for 6 m Top-Charged Coke Oven: System Design and Experiment

Zhang

2020

Applied Sciences

View full text Add to dashboard Cite

Coking with low moisture coal is an important link of energy conservation and coke quality improvement in the coking industry. Aiming at the problems of dust emission and bad accumulation in the coking chamber during coal charging, a new system of coking coal charged into 6 m top-charge coke oven was studied and designed, in which a cylinder with telescopic and high temperature resistance was used to fill the coking chamber with a dense phase continuous flow. The coal transport characteristics, dust emission, and accumulation characteristics were studied through the actual operation of the equipment. The results found that the matching of spiral feeding speed and cylinder lifting speed had an important influence on the transport characteristics, when moisture was 5%, and the control dense phase transport conditions were—cylinder lifting speed of 0.02 m/s and spiral feeding speed control range of [0.31 m/s, 0.50 m/s]. The new device was found to reduce dust emission by 90% per square meter, compared to the traditional. The influence of controllable factors on the accumulation characteristics of coal was studied, and the essential conditions for optimal repose angle and bulk density were obtained through an orthogonal test, the prediction model of accumulation characteristics was established.

show abstract

The use of the photogrammetric method for measurement of the repose angle of granular materials

Cited by 34 publications

References 15 publications

Microfluidic Crystallization for Screening of Spherical Particles of Pyraclostrobin

Microfluidic Crystallization for Screening of Spherical Particles of Pyraclostrobin

DEM Investigation of the Influence of Particulate Properties and Operating Conditions on the Mixing Process in Rotary Drums: Part 1—Determination of the DEM Parameters and Calibration Process

A New Coking Coal Charging Method for 6 m Top-Charged Coke Oven: System Design and Experiment

Contact Info

Product

Resources

About