CFD modeling to study the effect of particle size on dispersion in 20l explosion chamber: An overview

Ray, S. K.; Mohalik, N.K.; Khan, Asfar Mobin; Mishra, Debashish; Varma, N. K.; Pandey, Jai Krishna; Singh, Premlata

doi:10.1016/j.ijmst.2020.04.005

Cited by 29 publications

(5 citation statements)

References 11 publications

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“…Firstly, the shape of the sampling chamber would be directly related to the dead volume of the chamber and the airflow distribution in the chamber, which would greatly influence the retention of tobacco VOCs in the sampling process and further the sampling efficiency. CFD can directly reflect the dead volume of the cavity, and is often used to evaluate the distribution of gas flow velocity in the sampling chamber with different shapes [35][36][37][38]. Generally, the distribution area of low velocity is positively correlated with the dead volume of the sampling chamber.…”

Section: Design and Development Of The Sampling Devicementioning

confidence: 99%

Efficient and sensitive quantification of polar tobacco volatile organic compounds by a micro thermal-assisted sampling device using reduced graphene oxide coupling with thermal desorption-gas chromatography/mass spectrometry

Lai,

Han,

et al. 2023

AChrom

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It still remains a great challenge to selectively enrich and sensitively quantify the trace volatile organic compounds (VOCs) in real samples with complex matrix. In this study, an integration method combining a selective enrichment medium of reduced graphene oxide (rGO) with a specially designed micro thermal-assisted purge-and-trap sampling device was developed for efficient enrichment and sensitive quantification of trace tobacco VOCs coupling with thermal desorption (TD)-gas chromatography/mass spectrometry (GC/MS). The prepared rGO has been proved to possess excellent enrichment selectivity and capacity for tobacco polar VOCs with the multi-layer structure, good thermal stability and large specific surface area. The specially designed sampling device was efficient and suitable for enriching and sampling trace polar tobacco VOCs coupling with rGO medium. Under the optimized sampling and analytical conditions, the established analytical method could be actually applied for quantification of typical tobacco polar VOCs with the good recoveries of 72.9–128% and the satisfied RSDs of 1.8–19.9% (n = 3). The results suggested that the developed method was selective, sensitive and reliable for enrichment and quantification of trace tobacco polar VOCs.

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Section: Design and Development Of The Sampling Devicementioning

confidence: 99%

Efficient and sensitive quantification of polar tobacco volatile organic compounds by a micro thermal-assisted sampling device using reduced graphene oxide coupling with thermal desorption-gas chromatography/mass spectrometry

Lai,

Han,

et al. 2023

AChrom

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“…Key words: seismic sensors, explosion containment, mine working, air dust mixture have been used to study the influence of the nature of air currents on the nature of explosive combustion of coal airborne dust. [8] The addition of inert materials can significantly reduce the explosive properties of the mixture, until it burns out. This is achieved, for example, by a water curtain, which removes dust from the air stream, thereby reducing its accumulation in the ventilation networks of mines [9].…”

Section: Substantiation Of Design Parameters Of Coal Dust Explosion Containment Systemmentioning

confidence: 99%

Substantiation of Design Parameters of Coal Dust Explosion Containment System

Kostenko¹,

Zavialova²,

Pozdieiev³

et al. 2021

News of NAN RK. SGTS

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The aim of the paper is to identify the qualitative and quantitative parameters of seismic waves and accelerations on the mine working contour after an explosion of the gas-and-dust mixture. Information about the formation of seismic waves in the rock mass accommodating the mine working was received using modelling in order to improve the means of containment of explosion of further developed dust-air mixture. The parameters of seismic waves, such as propagation velocity and acceleration, amplitude, and frequency of oscillations of mine working walls, were established for the conditions of the experimental structure, which allows to scientifically substantiating the design parameters of the systems protecting the miners against explosion. The energy of the explosion propagates in the rock mass in the form of a series of peak-like pulses and oscillations with smaller amplitude. Modulus of acceleration is an informational indicator, which suits the most for registration by seismic sensors responding, specifically, to the most powerful peak pulses formed by seismic waves. By revealing the qualitative and quantitative indicators of seismic wave propagation on the mine working contour and in the rock mass, the parameters of seismic sensors of the systems protecting the miners against explosion can be substantiated.

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“…Some experts and scholars use numerical simulation or laboratory experiments to analyze and summarize dust migration rules and provide theoretical basis for dust control (Bhandari et al, 2004;Huang et al, 2019b;Jia et al, 2021). Santosh turbulent kinetic energy (TKE) and velocity vector path of dust-air mixture and dust-free air were simulated to understand their effects on coal dust dispersion (Ray et al, 2020;Sobolev et al, 2020). For the dust control methods in the blasting process of open-pit mines, many experts have put forward novel and efficient dust suppression methods.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine

et al. 2022

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In an open-pit mine in Xinjiang, part of the stripped area is covered by burnt rock. Due to the low strength and fragility of burnt rock, dust is more easily generated during blasting. Taking the mining area as the research background, the mechanical property parameters of burnt rock were tested, and the blasting parameter design of on-site operation was understood. The blasting numerical simulation of burnt rock step was carried out by using a numerical simulation software (LS-DYNA). From the angle of stress on rock, the stress cloud and stress curve of numerical simulation are analyzed, and it is concluded that the fundamental reason for the large dust production in blasting operation is that the burnt rock is crushed excessively after the action of explosion wave, and the explosive energy is too large, which is converted into kinetic energy to drive the dust to escape. In order to improve the utilization rate of explosives and reduce the output of blasting dust, the original blasting parameters were optimized as 8-m hole spacing, 6.5-m row spacing, 0.21-kg/m³ unit explosive consumption, 1-m interval charge, and 55-ms short-delay blasting through numerical simulation and orthogonal experiment. In the mining area, the measures of dustproof and dust reduction by blasting protection blanket and dust absorption cotton are adopted. Combined with the optimized blasting parameters, the field test proves that the dust removal efficiency is up to 82.4%.

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CFD modeling to study the effect of particle size on dispersion in 20l explosion chamber: An overview

Cited by 29 publications

References 11 publications

Efficient and sensitive quantification of polar tobacco volatile organic compounds by a micro thermal-assisted sampling device using reduced graphene oxide coupling with thermal desorption-gas chromatography/mass spectrometry

Efficient and sensitive quantification of polar tobacco volatile organic compounds by a micro thermal-assisted sampling device using reduced graphene oxide coupling with thermal desorption-gas chromatography/mass spectrometry

Substantiation of Design Parameters of Coal Dust Explosion Containment System

Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine

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