Influence of spontaneous percolation on apparent mass at the bottom of a Janssen granular column

Chand, Ram; Khaskheli, Murad Ali; Qadir, Abdul; Sandali, Yahya; Shi, Quan

doi:10.1016/j.physa.2013.09.022

Cited by 8 publications

(5 citation statements)

References 23 publications

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“…Glass beads of the diameter d = 3 mm were poured up to the upper edge of the prepared storage container with the volume Vexp = 0.00345 m 3 . The net weight of the poured amount of beads in the storage is m Vkexp = 5.518 kg.…”

Section: Measurement Proceduresmentioning

confidence: 99%

“…The standardised theory to calculate the pressure in storage facilities is Janssen's theory [1][2][3][4][5][6]. The computing standard according to this theory has been incorporated into the following standard: ČSN (Czech National Standard) 73 5570 Design of structures for storages, which is not currently effective and has been superseded by the standard ČSN EN 1991-4 ed.…”

Section: Introductionmentioning

confidence: 99%

“…The standardised calculation according to Janssen's theory [1][2][3][4][5][6][7] includes information about the structure of the storage facility and also very important information about the stored material, which are mechanical and physical properties. The basic calculation of the horizontal pressure on the structure of the storage facility is given by the relation Eq.…”

Section: Introductionmentioning

confidence: 99%

“…The calculated result of the bulk density is ρ exp = 1599 kg•m3 .A comparison of the bulk density ρ s = 1596 kg•m −3 from Eq. (12) and ρ exp = 1599 kg•m −3 from Eq.…”

mentioning

confidence: 98%

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Monitoring bulk material pressure on bottom of storage using DEM

et al. 2019

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This article focuses on the experimental verification of a mathematical derivation of Janssen’s theory, which describes the distribution of pressures within the bulk material and pressure distribution on the walls of storage facilities. The experimental verification is performed in two ways. The first is the real measurement of the load transfer in a bulk material cylinder and the second is similar to the detection of the load transfer through simulations using the DEM method. The aim is to compare the results of the theoretical calculation according to Janssen’s theory with the real measurement and a simulation of exactly the same model situation. At the beginning of any design or optimisation of existing transport or storage facilities, the most important is the analysis of the bulk material in the form of measurements of mechanical-physical properties. The analysis methods used are also described here. The pressure at the bottom of a storage container between the methods used showed negligible differences. From this finding, it can be concluded that the DEM method is a very suitable means for verifying the design of transport and storage facilities. The simulations provide important information and insights that can also be used to optimise existing transport or storage facilities.

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Section: Measurement Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The calculated result of the bulk density is ρ exp = 1599 kg•m3 .A comparison of the bulk density ρ s = 1596 kg•m −3 from Eq. (12) and ρ exp = 1599 kg•m −3 from Eq.…”

mentioning

confidence: 98%

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Monitoring bulk material pressure on bottom of storage using DEM

et al. 2019

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“…Granular material is common in daily life [1][2][3], demonstrating a variety of complicated behaviors, some of which are not thoroughly perceived [3][4][5][6][7]. One of the issues in this material is mixing and de-mixing or segregation of granules [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulations on Mixing Dynamics of Spherical and Non-Spherical Tablets in a Pan Coater

Chand

Lajimi

Uddin

et al. 2019

Eng. Technol. Appl. Sci. Res.

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Discrete element simulations provide valuable insight into the mixing dynamics of granular materials in industry. In this paper, numerical work is conducted in order to find the influence of pan rotational velocity and particle shape on mixing behavior. Four types of particles of different shapes were chosen: spherical, non-spherical type 1 (disk shape), non-spherical type 2 (capsule shape), and non-spherical type 3 (triangular shape). The pan mixer was filled with ~ 30 % volume of the same shape with the particles and was rotated at 15 RPM, 30 RPM, 45 RPM, and 60 RPM. The particles were colored as bottom-particles, middle-particles, and top-particles in order to visualize mixing efficiency. The homogeneity of the mixtures was determined by using contact dynamics of particles. The results show that fast-rotating pan (30-60 RPM) provides good mixing for all shapes of particles. However, non-spherical particles do not show as good mixing as spherical particles.

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