CFD–DEM simulation of fluid–solid flow of a tapered column separation bed

Chen, Duan; Cheng, Shuiyuan; Wu, Lingling; Zhao, Yuemin; He, Jinfeng

doi:10.1016/j.ijmst.2015.07.023

Cited by 7 publications

(3 citation statements)

References 20 publications

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“…The Navier–Stokes equations, which are formulations of the laws of conservation of mass, momentum, and energy, are solved in fluid regions of the retention bunker model, namely 22 , 27 :…”

Section: Methodsmentioning

confidence: 99%

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

Janoszek,

Rotkegel

2024

Sci Rep

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Underground coal storage bunkers serve as crucial infrastructural components in the coal mining industry, providing secure and accessible locations for the storage of mined coal. The interaction between stored coal and underground water in coal storage bunkers indeed poses significant challenges due to the unpredictable nature of the resulting coal-water mixture. This phenomenon is particularly prevalent in coal mines operating under water hazards, where groundwater infiltration into storage areas can lead to the formation of coal-water mixtures, altering the physical properties of the stored coal. The interaction between coal and water can result in the formation of coal-water mixtures (hydromixture), which exhibit complex rheological properties. These mixtures may vary in viscosity, density, and particle size distribution, making their behavior difficult to predict. Underground water may exert hydrostatic pressure on the stored coal, influencing its mechanical behavior and compaction properties. Changes in pressure can result in coal compaction or expansion, affecting bunker stability and the integrity of surrounding rock strata. The main goal of the paper was to determine the values of pressure field variations exerted by the flowing hydromixture within underground coal storage bunkers. This objective reflects a critical aspect of understanding the dynamic behavior of coal-water mixtures (hydromixture) under varying conditions, particularly in environments where water hazards pose significant challenges to storage and operational stability. The paper utilized computational fluid dynamics (CFD) methods to examine the changes in pressure within underground coal storage bunkers induced by the flow of coal-water mixtures. The examination of damage to an underground coal storage bunker due to stress distribution was conducted using the finite element method (FEM). This computational technique is widely utilized in engineering and structural analysis to model complex systems and predict the behavior of materials under various loading conditions The results of the CFD numerical simulation were compared with the mathematical models.

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Section: Methodsmentioning

confidence: 99%

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

Janoszek,

Rotkegel

2024

Sci Rep

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“…The validity of the above drag force expression has been investigated by many researchers [19][20][21], who have indicated that this expression works well in flow systems with relatively low Reynolds numbers.…”

Section: Governing Equations Of Cfd and Fluid-particle Intercationmentioning

confidence: 99%

A Coupled CFD–DEM Simulation of Slurry Infiltration and Filter Cake Formation during Slurry Shield Tunneling

Zhang

Yin

2018

Infrastructures

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Tunneling in highly permeable ground using a slurry shield machine can be challenging because it is difficult to form the so-called filter cake on the tunnel face to transport the support pressure. Consequently, destructive accidents might happen, such as face instability and water inrush. How to form an efficient filter cake in time is crucial during engineering practice, especially in ground with high permeability. Various theoretical and experimental analyses regarding the formation of filter cakes have been conducted. However, due to the complexity of this problem, which has to incorporate the mechanical and hydraulic behaviors of the fluid-solid mixture system, few numerical simulations are found in the literature. In this paper, with the aid of a newly developed numerical tool, a coupled CFD (computational fluid dynamics)-DEM (discrete element method) simulation is established to study the slurry infiltration and filter cake formation during slurry shield tunneling. The slurry infiltration process is simulated by modelling the scheme of the infiltration column test, in which sedimentation behaviors of slurry particles are captured and compared with experimental results. The results show that the sedimentation behaviors of the slurry particles and filter cake formation phenomenon are well captured by simulations and in accordance with the experiments, which indicates the robustness of the coupled CFD-DEM simulation used in present work.

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“…A robust and efficient algorithm for the simulation of explosive liquid-gas flows with fluid-structure interaction is provided [11]. Due to the complexity and the imperfect test equipment, numerical researches on the multicomponent multiphase flow are conducted widely in the industrial process [12][13][14][15]. For the complex fluid-solid mixture flow [16], the numerical investigation is completed by the FOCUS (Fluid flow Coupling with Solid's movement) code [17] and a coupled PIC-DEM model [18].…”

Section: Introductionmentioning

confidence: 99%

Systematic Analysis on Gas‐Liquid‐Solid Three‐Phase Flow and Initiation Structure for Fuel‐Air Explosive Weapon Reliability

Zhang

2021

Propellants Explo Pyrotec

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The missile safety and reliability play important roles in its evaluation and design. Failure or inaccuracy of initiation is an occasional but extremely troublesome hazard in weapon system safety. The uneven fuel distribution and uncontrollable motion of initiation structure are both the causations of this hazard in a double-event fuel-air explosive missile application. Thus, it is crucial to implement the coupling between the initiation structure and the fuel field to succeed in a reliable application. This paper employs CFD to simulate the explosive dispersal process of fuel and uses MATLAB to investigate the motion trajectory of the initiation structure. As for the solid-liquid fuel com-posed of 50 % aluminum powder and 50 % propylene oxide, its optimal concentration for reliable initiation is 186 275 g/m 3 . In the case of a 200 kg missile with a speed of 300 m/s, the results imply that, at 250 ~300 ms which is a reliable initiation time, the initiation structure gets to the reliable range of 10.8 ~14.1 m where the fuel concentration approaches to the optimal range for initiation. Ultimately, for any missile development, the coupled simulation-based approach is summarized to prevent the initiation failure and enhance its inherent safety, so as to avoid accident casualties and property loss.

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CFD–DEM simulation of fluid–solid flow of a tapered column separation bed

Cited by 7 publications

References 20 publications

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

A Coupled CFD–DEM Simulation of Slurry Infiltration and Filter Cake Formation during Slurry Shield Tunneling

Systematic Analysis on Gas‐Liquid‐Solid Three‐Phase Flow and Initiation Structure for Fuel‐Air Explosive Weapon Reliability

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