In mining applications, bucket–-soil interaction, grinding mills, bucket filling for a mining rope shovel, hopper, cyclone, cone crusher, and gyratory crusher were modeled with polyhedral particles. Mathematically, spherical particles are characterized only by their size (one parameter), and polyhedral particles can be represented by ...Web
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For spherical particles, there is a well-defined correlation between the drag coefficient c d and Reynolds number Re [12] [13] [14][15]. However, since the drag coefficient generally depends on ...Web
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Hydraulic collecting is the key technology in deep sea mining and dredging engineering. It determines economic benefits of the project and environmental issues. However, mechanistic studies of hydraulic collecting are rarely described. In this study, the mechanism of collecting spherical particles is researched by dimensional analysis and experimental …Web
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The preparation of spherical particles . Screening of bridging liquid. The selection of solvent system is crucial for the spherical agglomeration of the primary crystals. And the spherical particles with good morphology and uniform size distribution can only be achieved by choosing a suitable solvent system [36].Web
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The hydraulic transport of coarse particles is widely employed in the industrial processes of coal and mining, metallurgy, pharmacy and food engineering ... ω p is the angular velocity of a particle and I p = 0.1 m p d p 2 is the moment of inertia for a sphere particle. T c is the contact torque between particles and T f is the torque caused ...Web
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Understanding the behavior of a single particle flowing in a microchannel is a necessary step in designing and optimizing efficient microfluidic devices for the separation, concentration, counting, …Web
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Since the spherical particles can also be modeled by the super-ellipsoid method, the above composite contact algorithm is also applicable to the polyhedral-spherical particle system. ... (2019YFC1805600), and the support provided by the State Key Laboratory of Process Automation in Mining & Metallurgy and Beijing Key …Web
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The particles need to be dropped carefully near the fracture entrance in the top to avoid any air bubbles that might stick to the spherical particles, as these can impact the settling velocity results. The settling measurement …Web
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This research presents a mathematical framework that places the physics and the dynamics of viscosity within a physical environment that captures the effect of the shape and overall weight of non-spherical …Web
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Detachment behavior of single glass particle with the same mass but different shapes from an oscillation bubble driven by the ultrasound energy was investigated. The maximum acceleration of …Web
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energies Article Experimental Research on Hydraulic Collecting Spherical Particles in Deep Sea Mining Guocheng Zhao 1,2, Longfei Xiao 1,2,*, Tao Peng 1,2 and Mingyuan Zhang 1 1 State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; [email protected] (G.Z.); [email protected] …Web
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deep-sea mining; hydraulic suction; particle motion characteristics; solid–liquid two-phase flow; vertical force. 1. Introduction. With the rapid growth of the …Web
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The present work is concerned with the lift forces acting on particles immersed in an unbounded fluid. Both mechanisms due to rotation of the particle and vorticity of the fluid flow are considered. Focus is on solid spherical particles at Reynolds numbers up to 10 3 which are relevant for particulate flows in chemical and minerals …Web
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Effect of particle motion on the hydraulic collection of coarse spherical particles. Deep-sea mining, through which shattered coarse solid mineral resources are …Web
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Most studies have investigated the migration and clogging of spherical particles, however, natural particles are rarely spherical, but exhibit eccentricity, …Web
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The spherical particle concentration increases from top to bottom in the vertical direction of the pipe, reaching a maximum (30%) near the bottom of the pipe that extends from the bottom of the pipe to y/D = 0.2. This result indicates that the sedimentation and aggregation of particles in the lower half of the pipe result in a particle bed.Web
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While conventional DEM commonly employs circular or spherical particles for efficient simulations, variants of DEM have recently been developed to model particles with different shapes [4]. ... and mining engineering. The introduction of irregular or realistic complex particle shapes requires the development of computationally efficient contact ...Web
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ABSTRACT. Experimental and numerical studies are carried out to investigate the characteristics of flow field and forces acting on spherical particles in deep sea hydraulic collecting. For numerical simulation, Detached Eddy Simulation (DES) method is applied and is verified to be feasible for predicting the forces acting on the spherical …Web
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It is well known that most particle technology studies attempting to predict secondary properties based on primary properties such as size and shape begin with particle characterization, which means the process of determining the primary properties of particles in a wide spectrum from macro to nanoscale. It is a fact that the actual shape …Web
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Introduction. Particle settling velocity is a key variable affecting sedimentation and transportation processes involved in many industrial operations such as settling of drilled cuttings and proppants in drilling and fracturing fluids, design of separators and settling tanks, and hydraulic and pneumatic transportation of solid particles in …Web
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Particle motion in fluids is a subject of considerable practical importance to engineers working in fields such as hydraulics, river mechanics, chemical engineering and mineral processing. Many mathematical models have been proposed to predict the terminal settling velocities of particles in a fluid medium. The selection of an appropriate …Web
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The actual manganese nodule particles are approximately spherical, the shape of the particles is set to spherical, using a single spherical particle model. …Web
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The biomass and inert material are represented in the simulation by rod-like particles and spherical particles, with the rod-like particles on top of the spherical particles in their initial packing and a total particle mass of 0.5 kg in all cases, as shown in Fig. 1 b. Moreover, the considering particle diameters of the sphere and rod-like ...Web
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Some important aspects (i.e., powder electrification during pneumatic conveying, pipe bend erosion, non-spherical particle transport) that have not been well summarized previously are given special attention, as is the application in some new-rising fields (ocean mining, hydraulic fracturing, and gas/oil production).Web
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Numerical simulation, in which the motion of individual particles was calculated, was performed of a two-dimensional gas-fluidized bed. Contact forces between particles are modeled by Cundall's ...Web
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In this example, we demonstrate the ability of our model to handle mix-sized particles by combining the FP method with the IB method. The simulation involves a highly viscous fluid flowing over a granular bed composed of spherical particles with three different sizes, which are D = 500 μ m (small), 1000 μ m (medium), and 2000 μ m (large).Web
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Non-spherical shape is a general appearance feature for bioparticles. Therefore, a mechanical mechanism study of non-spherical particle migration in a microfluidic chip is essential for more precise isolation of target particles. With the manipulation of non-spherical particles, refined disease detection or medical …Web
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Experimental Research on Hydraulic Collecting Spherical Particles in Deep Sea Mining. Guochen Zhao Longfei Xiao T. Peng Mingyuan Zhang. Engineering, Environmental Science. Energies. 2018. Hydraulic collecting is the key technology in deep sea mining and dredging engineering. It determines economic benefits of the project and …Web
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behavior. Zhao et al. [16] carried out studies of hydraulic collection of single spherical particle at various collecting bottom clearances and flow rates by both experiments and …Web
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In the agricultural and mining sectors the filling, storage and discharge from silo's, hoppers and bins can be analysed [[2], [3], [4]], as well as conveyor transfer chutes [5,6], crushing [7], screening [8] and material-equipment interaction [[9], [10], [11]]. ... Non-spherical particles with sliding friction and the exclusion of rolling ...Web
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