DEM modelling and analysis of the mixing characteristics of sphere
The maturity of methods for characterizing particle shape makes the mixing process of multi-shape particles become a reality. As a representative mixture of multi-shape particles, sphere-cylinder granular matter has attracted much attention due to its important applications in industry (e.g., fuel blends of biomass and coal materials) [33,34].Web
اقرأ أكثرLift forces on solid spherical particles in unbounded flows
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
اقرأ أكثرInvestigation on Vertical Incipient Motion of Spherical …
The characteristics of flow field and vertical force of spherical particle in the hydraulic collecting are simulated by Detached Eddy Simulation (DES) method and the six-degree …Web
اقرأ أكثرNumerical and experimental investigations on pipeline
The actual manganese nodule particles are approximately spherical, the shape of the particles is set to spherical, using a single spherical particle model. …Web
اقرأ أكثرInvestigation on Characteristics of Forces on Spherical Particles …
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
اقرأ أكثرA force partitioning method to model spherical particles in liquid
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
اقرأ أكثرBlockage of the Deep-Sea Mining Pump Transporting Large Particles …
The present study aims to plumb blockage of the deep-sea mining pump transporting large particles with different shapes. A numerical work was performed through combining the computational fluid dynamics (CFD) technique and the discrete element method (DEM). Six particle shapes with sphericity ranging from 0.67 to 1.0 were …Web
اقرأ أكثرNumerical investigation of the hydraulic transport of coarse particles
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
اقرأ أكثرExperimental Research on Hydraulic Collecting …
In this study, the mechanism of collecting spherical particles is researched by dimensional analysis and experimental study. The …Web
اقرأ أكثرRecent progress on the discrete element method
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
اقرأ أكثرCalibration of the discrete element method: Strategies for spherical
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
اقرأ أكثرA Case Study of Hydraulic Collecting a Single Spherical Particle
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
اقرأ أكثرEffect of particle motion on the hydraulic collection of coarse
A case study of hydraulic collecting a single spherical particle. In: The 27th International Ocean and Polar Engineering Conference, San Francisco (2017) Zhao, G.C., Xiao, L.F., Peng, T., et al.: Experimental research on hydraulic collecting spherical …Web
اقرأ أكثرDiscrete element modeling and simulation of non-spherical particles
Non-spherical particles have always been an important research target in the study of particle and particle systems. ... For example, in the common ball mill equipment of the mining industry, the irregular polyhedral ore are broken under the action of the grinding media. During grinding process of ore, ore particles are usually polyhedrons …Web
اقرأ أكثرFabrication and Manipulation of Non-Spherical Particles in
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
اقرأ أكثرThe effect of particle shape on discharge and clogging
Clearly, sphericity decreases as the particle shape deviates from a spherical geometry for which ψ = 1.Figure 1 lists the value of sphericity ψ for the particles tested in this study. Particle ...Web
اقرأ أكثرStudy of the hydraulic transport of non-spherical particles in a
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
اقرأ أكثرMicromachines | Free Full-Text | Transport of Non …
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
اقرأ أكثرMixing study of non-spherical particles using DEM
The spherical particles have the highest granular temperature than the prolate and the oblate particles, which have same granular temperatures. To predict the mixing time, regression models were employed. ... Large volumes of waste rock are produced during mining operations and are often disposed of in large piles on the …Web
اقرأ أكثرDetachment Behavior of Single-Curved/NonCurved …
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
اقرأ أكثرNumerical Study on Settling and Floating Movements of a Sphere Particle
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
اقرأ أكثرA Case Study of Hydraulic Collecting a Single Spherical …
The characteristics of flow field and force of a single spherical ore particle in the hydraulic collecting have been investigated. Researches of hydraulic collecting spherical particles …Web
اقرأ أكثرCharacterisation of the effects of particle shape using a …
For example, a typical conveyor belt in a mining operation may carry over (10^{12}) randomly sized and shaped particles bigger than (1,upmu text {m}) ... that a fabric will evolve with bulk deformation. The same can be said regarding rolling friction; in an assembly of spherical particles with rolling friction, rolling directions and ...Web
اقرأ أكثرGranular element method for computational particle mechanics
Nonetheless, incorporating the effects of non-spherical or complex particle shapes into existing modelling frameworks, such as the discrete element method (DEM), has remained challenging. In this work, we propose the volume-interaction level set DEM (VLS-DEM) approach for carrying out physically accurate simulations of particles with …Web
اقرأ أكثرSettling velocities of particulate systems — a critical
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
اقرأ أكثرTranslational and Rotational Motion Measurement of a …
mining vessel, pipe, and mining vehicle on the seabed that picks up solid particles or alluvial forms of solids, including heavy min-eral particles, from the deep seabed and transports the solid par-ticles to the sea surface. The mineral particles are mostly spheri-cal or ellipsoidal, with their long-axis length varying from 2 cmWeb
اقرأ أكثرExperimental Research on Hydraulic Collecting Spherical Particles …
Figure 13. Tolerance between calculated Cvs' and measured Cvs for 234 cases. Figure 13. Tolerance between calculated Cvs' and measured Cvs for 234 cases. - "Experimental Research on Hydraulic Collecting Spherical Particles in Deep Sea Mining"Web
اقرأ أكثرEffect of particle size and particle loading on the mixing behavior …
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
اقرأ أكثرMinerals | Free Full-Text | A Review of Particle Shape Effects on
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
اقرأ أكثرFluids | Free Full-Text | The Single Particle Motion of …
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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