CFD Simulation and Experimental Study on Solid-Liquid Hydrocyclone

2012 ◽  
Vol 562-564 ◽  
pp. 1606-1609
Author(s):  
Si Huang ◽  
Yue Le ◽  
Luo Li
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Cfd Simulation ◽  
Separation Efficiency ◽  
Test System ◽  
Equation Model ◽  
Liquid Particle ◽  
Two Phases ◽  
Solid Liquid

This paper presents a numerical simulation and experimental study on a solid-liquid hydrocyclone. In the simulation, the standard k-ε turbulence model and the zero-equation model are employed to compute the flow field of the two phases in the hydrocyclone under different conditions, such as viscosity of the liquid, particle size and flow rate. In the experiment, a hydrocyclone is manufactured and measured for the separation efficiency and pressure drop in the test system. The simulation result of hydrocyclone performance matches well with the experimental data.

Three Dimensional Numerical Simulation of Solid-Liquid Separation of Horizontal Spiral Sedimentation Centrifuge

2013 ◽  
Vol 634-638 ◽  
pp. 1655-1658
Author(s):  
Qiu Bo Huang ◽  
Qing Jie Liu ◽  
Sheng Ju Zang
Keyword(s):  
Numerical Simulation ◽  
Separation Efficiency ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Liquid Separation ◽  
Sedimentation Centrifuge ◽  
Fluent Software ◽  
Solid Liquid ◽  
Solid Liquid Separation ◽  
The Relationship

The separation efficiency, separation factor, flow and other parameters are closely related in terms of horizontal spiral sedimentation centrifuge. This article takes lwb350 horizontal spiral sedimentation centrifuge for example, with the help of FLUENT software, the relationship among the separation efficiency and the working speed as well as feed flow is analyzed through the numerical simulation of solid-liquid separation, which can provide reference for the application of simulation analysis and research on properties of spiral centrifuge.

Experimental Study of the Hydrocyclone H11 with Rotational Feed

2014 ◽  
Vol 802 ◽  
pp. 256-261
Author(s):  
Danylo de Oliveira Silva ◽  
Fernanda Falqueto Salvador ◽  
Luiz Gustavo Martins Vieira ◽  
Marcos Antonio de Souza Barrozo
Keyword(s):  
Experimental Study ◽  
Energy Cost ◽  
Phosphate Rock ◽  
Separation Efficiency ◽  
Experimental Studies ◽  
Dispersed Phase ◽  
Important Group ◽  
Size Of Particles ◽  
Solid Liquid ◽  
Feed Inlet

Hydrocyclones are separators that are widely used in industry that belong to an important group of equipments designed to solid-liquid or liquid-liquid separation. The employment of hydrocyclones is generally restricted to an equipment need with a high classifying power (based on the size of particles collected in the underflow) or with a high concentrating capacity. The separation occurs by density difference or particle size distribution of the dispersed phase. In order to maximize the separation efficiency of these devices, the aim of this work was to study experimentally the consequences of an unusual feed in the behavior of a hydrocyclone. Therefore, tests were carried out with aqueous suspensions of phosphate rock at a fixed level of pressure drop equal to 1.47 bar, using the optimized geometry hydrocyclone H11. The influence of the so called rotating feed inlet for the H11 was evaluated in clockwise and anticlockwise. Experimental studies have suggested that the rotation of the fluid in the feed inlet of hydrocyclone did not change significantly the underflow-to-throughput ratio (RL), although it has caused changes in the energy cost and in the performance of the separator.

Simulation and Experimental Study on the Impact of Breadth of Back Blade on Axial Force Balance

2011 ◽  
Vol 130-134 ◽  
pp. 1568-1572
Author(s):  
Hui Wang ◽  
Jie Gang Mu ◽  
Miao Yin Su ◽  
Shui Hua Zheng ◽  
Jin Jing Zhao ◽  
...  
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Axial Force ◽  
Three Dimensional ◽  
Force Balance ◽  
Simulation And Experiment ◽  
Simulation Results ◽  
The Impact ◽  
The Relationship

The paper studies the relationship between axial force and breadth of back blade by numerical simulation and experiment. On the basis of the RNG k-ε turbulence model and technology of compact local grids and regional computing, three dimensional numerical simulations to 100HZ165-250 centrifugal pump with various breadths were carried out. Through comparing and analyzing of the flow field, it can be seen that the axial force reduces with the increase of the back blade breadth. After that, the simulation results were verified by the experimental data got from different test devices, and it shows that the conclusions are reliable.

Numerical Simulation and Experimental Research on Fatigue Strength of the Injector Guide Pillar under Complex Loads

2010 ◽  
Vol 118-120 ◽  
pp. 196-200
Author(s):  
Jin Guo Li ◽  
Xiao Gui Wang ◽  
Zeng Liang Gao
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Fatigue Life ◽  
Fatigue Strength ◽  
Numerical Analysis ◽  
Experimental Research ◽  
Contact Surface ◽  
Electronic Measurement

Under the complex loads, the injector guide pillar (IGP) used in injection machine was failure only after 1.5-year-service. In order to determine the cause of the fracture, the numerical simulation technology was applied to analyze the mechanical properties of the IGP. The contact between the mating surfaces of the clamping mechanism was modeled; nonlinear multi-region contact of surface-surface was applied to establish the contact model of FEA. The constraint of tie was used for modeling thread joint. The simulated results indicated that the smaller area of contact surface, the higher value of stress in the neck of IGP. Electronic measurement was also used to check the results of stress in IGP obtained by FEA. It was found that the experimental data agreed well with simulated results. Based on the numerical analysis and experimental study, the structure of IGP was improved by adopting a smoother double-round neck. The fatigue life of the improved structure was longer than that of the original machine.

scholarly journals Research on Sand-dust Separation Technology Based on Gas-solid Two-phase Numerical Simulation

2020 ◽  
Vol 145 ◽  
pp. 02068
Author(s):  
Lei Zhang ◽  
Junwei Wang ◽  
Guohua Li
Keyword(s):  
Numerical Simulation ◽  
Large Scale ◽  
Separation Efficiency ◽  
Simulation Method ◽  
Test System ◽  
Two Phase ◽  
Separation Technology ◽  
Electromechanical Products ◽  
Environment Simulation ◽  
Sand Dust

The separation technology in the large-scale sand-dust environment ground simulation test system applicable to the environmental adaptability and reliability verification of aerospace electromechanical products is studied. The gas-solid two-phase numerical simulation method is adopted, and the possible cyclone separation, inertial separation methods are used to study the separation efficiency and regularity technology, which provides a basis for the separation design and test of the sand-dust environment simulation of large electromechanical products.

Numerical Simulation and Experimental Study on Supercritical CO2 Extraction of Red Pepper Seed

2012 ◽  
Vol 610-613 ◽  
pp. 3437-3442
Author(s):  
Yu Qi Wang ◽  
Jin Yan Wang ◽  
Shi Feng Ni ◽  
Lan Zheng ◽  
Shao Fei Shi ◽  
...  
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Model Equation ◽  
Influence Factors ◽  
Mass Transfer Process ◽  
Extraction Yield ◽  
Red Pepper ◽  
Optimum Pressure ◽  
Pepper Seed

Numerical simulation and experimental study on the extraction of oil from red pepper seed using supercritical CO2 was performed in this study. Some main influence factors were investigated, including the influence of operation pressure and temperature on extraction yield Xe(%). A model equation was established based on mass transfer process, and the model equation was validated with the experimental data. The maximal and minimal relative errors between experimental data and numerical simulation value were 1.29% and 0.28% respectively. The results of 3-D simulations were obtained by associating extraction yield Xe(%) with operation temperature and pressure. As shown in the figures, it is obvious that there is an excellent agreement between the correlations results and the experimental data. Consequently, the optimum pressure and temperature were determined to be 20MPa and 318K respectively.

Comparison of Various Spatial Discretization Schemes in Numerical Simulation for Ship Airwakes

2014 ◽  
Vol 627 ◽  
pp. 63-68 ◽  
Author(s):  
Shao Hua He ◽  
Dong Yue Liu ◽  
Da Li Tan
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Cfd Simulation ◽  
Computational Cost ◽  
Second Order ◽  
Upwind Scheme ◽  
Spatial Discretization ◽  
Third Order ◽  
Quick Scheme ◽  
Discretization Schemes

For numerical simulation of ship airwake by CFD, based on the use of an unstructured grid, thek-εturbulence model and SIMPLE algorithm, the characteristic features of complex fluid flows eg recirculation zones and strong vortex fields in the aircarft operating region of a generic 3D frigate model was presented. The accuracy of the predication was checked by performing calculations on different grid sizes and comparing with wind-tunnel flow visualization data. A comparison of several typical spatial discretization schemes was performed.y+values were also tested. The general features of the flow predicted in this paper compare reasonably well with experimental data. However, CFD simulation produced a higher velocity in the vicinity of vortex zone when compared to experimental data. Obvious differences exist between results by first-order upwind scheme (power law scheme) and second-order upwind scheme (QUICK scheme, third-order MUSCL scheme). Second-order upwind scheme (QUICK scheme, third-order MUSCL scheme) are recommended for the CFD simulation of ship airwakes with a modest increase in computational cost.y+values from o (10) to o (1000) can all be accepted for the CFD simulation of ships (e.g., SFS1 ) with Reynolds number 108or more.

CFD Simulation of Hydrogen Separation in Pd Hollow Fiber Membrane

2016 ◽  
Vol 11 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Zahra Mansourpour ◽  
Hooman Ziaei-Halimejani ◽  
Seyed Morteza Sadeghnejad ◽  
Mohammadreza Boskabadi
Keyword(s):  
Experimental Data ◽  
Hollow Fiber ◽  
Cfd Simulation ◽  
Hydrogen Adsorption ◽  
Separation Efficiency ◽  
Hollow Fiber Membrane ◽  
Hydrogen Separation ◽  
Operating Conditions ◽  
Fiber Membrane ◽  
Membrane Modeling

Abstract In this article, hydrogen adsorption from gas mixture involve nitrogen and hydrogen by palladium hollow fiber membrane investigated and two dimensional model proposed for hydrogen adsorption in this model. This model has been evaluated based on equations (momentum and mass transfer) in all three parts (shell, membrane and tube) for existing gaseous compounds with using finite element method. The results of simulation validated by experimental data of hydrogen adsorption by palladium hollow fiber membrane. Modeling predictions shows good agreement with experimental data at different operating conditions such as different gas flows, temperature, pressure and etc. the result of simulation shows hydrogen separation efficiency increases with increasing temperature and pressure and decreases with increasing inlet rate. Also with using this model better performance of hollow fiber membranes can be obtained. In fact, hollow fiber membrane can be designed at different conditions and for different rates that it can save cost of various tests.

The Comparison with Numerical Simulation Results of Steam-Water Flow Field and Experimental Data for Car Exhaust Pipe

2011 ◽  
Vol 187 ◽  
pp. 570-574
Author(s):  
Qing Guo Liu ◽  
Yan Ma ◽  
Chun Mei Yang
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Flow Field ◽  
Separation Efficiency ◽  
Tangential Velocity ◽  
Exhaust Pipe ◽  
Two Phase ◽  
Car Exhaust ◽  
Simulation Results ◽  
The Relationship

In this paper, the physical model for flow field of exhaust pipe has been established on the condition of a liquid-gas exhaust pipe from cars using ethanol gasoline. The numerical simulation results for internal flow field of car exhaust pipe are compared with the experimental data. It is showed that the outside free vortex tangential velocity and axial velocity of single-phase flow field have been simulated better. It is indicated in the simulation of separation process of steam-water two-phase: The relative error, comparing the relationship between flow and separation efficiency with measured of that is less than 7%, and the same to 15%, comparing the relationship between flow and separation ratio with measured of that. Thereby, it is confirmed correctly for the mathematical model founded for numerical calculation and the algorithm selected.

Numerical Simulation and Experimental Study of Wind Distributor

2012 ◽  
Vol 204-208 ◽  
pp. 4320-4326
Author(s):  
Yi Tong Li ◽  
Li Ying Sun ◽  
Hai Tao Na ◽  
Liang Liu
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Indoor Air ◽  
Computing Time ◽  
Simplified Model ◽  
Distribution Characteristics ◽  
Turbulent Model ◽  
Indoor Temperature ◽  
Modeling Process

In order to study the distribution of indoor air from wind distributor, the velocity field and temperature field in the room are simulated with AIRPAK software which uses indoor zero-equation turbulent model. To simplify the physical model of wind distributor, five model methods have been used in the modeling process. The indoor temperature and velocity distribution characteristics were obtained and did a comparative study with the experiment. The results of the study show that the model can be simplified largely, simplified model consistent with the experimental data can also save computing resources and computing time in modeling process of wind distributor.

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