Study on Flow Characteristics of Hydraulic Suction of Seabed Ore Particles

Efficient and environmentally friendly ore collecting operation requires that the ore collecting head can provide just enough suction to start the ore particles in different working conditions. In this work, computational fluid dynamics and discrete element method (CFD-DEM) is used to simulate the h...

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Veröffentlicht in:Processes 2023-05, Vol.11 (5), p.1376
Hauptverfasser: Xia, Qiu, Jia, Hao, Sun, Jiuchun, Xi, Xiaoguang, Cui, Jingyu
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creator Xia, Qiu
Jia, Hao
Sun, Jiuchun
Xi, Xiaoguang
Cui, Jingyu
description Efficient and environmentally friendly ore collecting operation requires that the ore collecting head can provide just enough suction to start the ore particles in different working conditions. In this work, computational fluid dynamics and discrete element method (CFD-DEM) is used to simulate the hydraulic suction process of ore particles. After analyzing the pressure and velocity characteristics of the flow field, the effects of different suction velocities on the lateral displacement offset, drag coefficient Cd and Reynolds number Rep of particles are studied. It is determined that the lifting force is caused by the different flow velocities of the upper and lower flow fields; particle start-up time and the lateral offset are inversely proportional to suction speed. When h/d ≥ 2.25, the vertical force on particles is no longer affected by h/d. When S/d = 2.5, FZ decreases to 0 N; when h/d increases from 1.5 to 1.75, FZ decreases by nearly half. Three empirical equations for FZ represented by D/d, h/d, and S/d are obtained. After integrating the above three equations, the functional relationship of FZ with D/d, h/d and S/d is finally obtained within a certain range. The errors of the equations are within 6%. The particle stress characteristics obtained in this paper can be applied to the establishment of ore collecting performance prediction model and provide data support for the research and development of intelligent ore collecting equipment.
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In this work, computational fluid dynamics and discrete element method (CFD-DEM) is used to simulate the hydraulic suction process of ore particles. After analyzing the pressure and velocity characteristics of the flow field, the effects of different suction velocities on the lateral displacement offset, drag coefficient Cd and Reynolds number Rep of particles are studied. It is determined that the lifting force is caused by the different flow velocities of the upper and lower flow fields; particle start-up time and the lateral offset are inversely proportional to suction speed. When h/d ≥ 2.25, the vertical force on particles is no longer affected by h/d. When S/d = 2.5, FZ decreases to 0 N; when h/d increases from 1.5 to 1.75, FZ decreases by nearly half. Three empirical equations for FZ represented by D/d, h/d, and S/d are obtained. After integrating the above three equations, the functional relationship of FZ with D/d, h/d and S/d is finally obtained within a certain range. The errors of the equations are within 6%. The particle stress characteristics obtained in this paper can be applied to the establishment of ore collecting performance prediction model and provide data support for the research and development of intelligent ore collecting equipment.</description><identifier>ISSN: 2227-9717</identifier><identifier>EISSN: 2227-9717</identifier><identifier>DOI: 10.3390/pr11051376</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Collectors ; Computational fluid dynamics ; Discrete element method ; Drag coefficients ; Efficiency ; Empirical equations ; Experiments ; Flow characteristics ; Flow velocity ; Fluid dynamics ; Fluid flow ; Hydraulics ; Lateral displacement ; Mathematical models ; Mining ; Ocean bottom ; Ocean floor ; Performance prediction ; Prediction models ; R&amp;D ; Research &amp; development ; Reynolds number ; Simulation ; Suction ; Velocity ; Vertical forces</subject><ispartof>Processes, 2023-05, Vol.11 (5), p.1376</ispartof><rights>COPYRIGHT 2023 MDPI AG</rights><rights>2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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subjects Collectors
Computational fluid dynamics
Discrete element method
Drag coefficients
Efficiency
Empirical equations
Experiments
Flow characteristics
Flow velocity
Fluid dynamics
Fluid flow
Hydraulics
Lateral displacement
Mathematical models
Mining
Ocean bottom
Ocean floor
Performance prediction
Prediction models
R&D
Research & development
Reynolds number
Simulation
Suction
Velocity
Vertical forces
title Study on Flow Characteristics of Hydraulic Suction of Seabed Ore Particles
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