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2004
2004 •
2001 •
2000 •
Volume 1: Symposia, Parts A and B
Numerical Simulation and Experiments of the Multiphase Flow in a Liquid-Liquid Cylindrical Cyclone Separator2006 •
Applied Mathematical Modelling
The effect of cyclone inlet dimensions on the flow pattern and performance2010 •
The effect of the cyclone inlet dimensions on the performance and flow field pattern has been investigated computationally using the Reynolds stress turbulence model (RSM) for five cyclone separators. The results show that, the maximum tangential velocity in the cyclone decreases with increasing the cyclone inlet dimensions. No acceleration occurs in the cyclone space (the maxi- mum tangential velocity is nearly constant throughout the cyclone). Increasing the cyclone inlet dimensions decreases the pressure drop. The cyclone cut-off diameter increases with increasing cyclone inlet dimension (consequently, the cyclone overall efficiency decreases due to weakness of the vortex strength). The effect of changing the inlet width is more significant than the inlet height especially for the cut-off diameter. The optimum ratio of inlet width to inlet height b/a is from 0.5 till 0.7.
2007 •
Transactions of the Indian Institute of Metals
Multiphase CFD Modelling of Mineral Separators Performance: Validation Against Tomography DataThis paper aims on application of computational fluid dynamic (CFD) modelling on two-phase and multiphase flows in 75 mm conventional hydrocyclone, 350 mm dense medium cyclone (DMC) and 100 mm diameter laboratory column flotation. Along with classification experiments, a dual-planar high speed electrical resistance tomography (ERT) is used to measure the internal flow dynamics in situ in 75 mm hydrocyclone and column flotation at different operating conditions. Experiments are carried out in 75 mm hydrocyclone for different operational parameters and feed solids content varying in the range of 0–30 wt%. Results are presented in terms of the air core diameter and solids volume fraction contours using Maxwell’s conductivity equation. It is confirmed by ERT that the air core occupied area and wall solids conductivity levels decreases with increasing the feed solids concentration. Similarly, ERT is used to estimate the mean gas hold-up and radial distribution in order to understand the hydrodynamics of the column flotation. The effect of air superficial velocity and liquid flow rate on gas hold-up is discussed. Algebraic slip mixture model modified with lift, drag and rheology is used to predict the air core size, the solid concentration distribution and classification performance for the hydrocyclone. Validation of air core size and mean solid volume fractions by ERT measurements with the CFD simulations is attempted. The CFD predicted air core radius and medium segregation in the DMC is validated against literature based gamma ray tomography data. Further discrete phase model (DPM) is used to track and measure the residence times of different size and density coal particles. CFD predicted gas hold-up in the column flotation is also validated against in-house measured ERT and imaging data.
Journal of Energy Resources Technology
Design and Performance of Passive Control System for Gas-Liquid Cylindrical Cyclone Separators1998 •
The performance of gas-liquid cylindrical cyclone (GLCC) separators can be improved by reducing or eliminating liquid carryover into the gas stream or gas carryunder through the liquid stream, utilizing a suitable liquid level control. In this study, a new passive control system has been developed for the GLCC, in which the control is achieved by utilizing only the liquid flow energy. A passive control system is highly desirable for remote, unmanned locations operated with no external power source. Salient features of this design are presented here. Detailed experimental and modeling studies have been conducted to evaluate the improvement in the GLCC operational envelope for liquid carryover with the passive control system. The results demonstrate that a passive control system is feasible for operation in normal slug flow conditions. The advantage of a dual inlet configuration of the GLCC is quantified for comparative evaluation of the passive control system. The results of this stu...
Journal of Energy Resources Technology
Performance Improvement of Gas Liquid Cylindrical Cyclone Separators Using Integrated Level and Pressure Control Systems2000 •
The performance of gas-liquid cylindrical cyclone (GLCC©) separators for two-phase flow metering loop can be improved by eliminating liquid overflow into the gas leg or gas blow-out through the liquid leg, utilizing suitable integrated control systems. In this study, a new integrated control system has been developed for the GLCC, in which the control is achieved by a liquid control valve in the liquid discharge line and a gas control valve in the gas discharge line. Simulation studies demonstrate that the integrated level and pressure control system is highly desirable for slugging conditions. This strategy will enable the GLCC to operate at constant pressure so as not to restrict well flow and simultaneously prevent liquid carry-over and gas carry-under. Detailed experimental studies have been conducted to evaluate the improvement in the GLCC operational envelope for liquid carry-over with the integrated level and pressure control system. The results demonstrate that the GLCC equi...
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Energy Conversion and Management
Enhancement of a cylindrical separator efficiency by using double vortex generators2009 •
Proceedings of SPE Annual Technical Conference and Exhibition
Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC) -Experiment and Modeling2001 •
Spe J
Oil/Water Separation in Liquid/Liquid Hydrocyclones (LLHC): Part 1 - Experimental Investigation2002 •
2004 •
2002 Annual Conference Proceedings
Nsf Combined Research And Curriculum Development On Multiphase Transport Phenomena2021 •
ASME/JSME 2011 8th Thermal Engineering Joint Conference
Characterization of a Dual Chambered Two Phase Separator2011 •
Progress in Computational Fluid Dynamics an International Journal
Reynolds-Stress Model for Eulerian multiphase2015 •
Volume 2, Fora: Cavitation and Multiphase Flow; Fluid Measurements and Instrumentation; Microfluidics; Multiphase Flows: Work in Progress; Fluid-Particle Interactions in Turbulence
Numerical Prediction of Collection Efficiency of a Personal Sampler Based on Cyclone Principle2014 •
Separation and Purification Technology
Fundamental understanding of swirling flow pattern in hydrocyclones2012 •
2019 •
International Journal of Heat and Fluid Flow
Numerical and experimental study of an axially induced swirling pipe flow2015 •
Metallurgical and Materials Transactions B
CFD Modeling of Swirl and Nonswirl Gas Injections into Liquid Baths Using Top Submerged Lances2010 •
Combustion and Flame
Effects of primary breakup modeling on spray and combustion characteristics of compression ignition engines2010 •
Computers & Fluids
Numerical Modeling of the Flow Field and Performance in Cyclones of Different Cone-Tip Diameters2011 •
International Journal of Multiphase Flow
Two-way coupling of Eulerian–Lagrangian model for dispersed multiphase flows using filtering functions2001 •
Chemical Engineering Journal
Thermal fluid dynamics analysis of gas–liquid flow on a distillation sieve tray2008 •
2011 •
Jose Lopez Ph.D Dissertation. The University of Tulsa. Dissertation. Falling Film and Gas Entrainment in Vertical Downward Two-Phase Flow
Jose Lopez Ph.D Dissertation. The University of Tulsa. Falling Film and Gas Entrainment in Vertical Downward Two-Phase Flow2011 •
Acta Mechanica
Modeling mass loading effects in industrial cyclones by a combined Eulerian–Lagrangian approach2009 •
ISA03-P161, Paper …
Mathematical modeling for integrated three-phase compact separators2003 •
2010 •
Journal of bioscience and …
Computational fluid dynamics modeling of gas dispersion in multi impeller bioreactor2010 •
Journal of Bioscience and Bioengineering
Computational fluid dynamics modeling of gas dispersion in multi impeller bioreactor(BIOCHEMICAL ENGINEERING)2010 •