Simulation on the Flow Field of Mini-Hydrocyclones for Different Inlet Sizes

2013 ◽  
Vol 864-867 ◽  
pp. 1183-1191 ◽  
Author(s):  
Chao Yan ◽  
Qiang Yang ◽  
Hua Lin Wang
Keyword(s):  
Aspect Ratio ◽  
Flow Field ◽  
Solid Particles ◽  
Design And Optimization ◽  
Fluent Software ◽  
Simulation Results ◽  
Shape And Size

This paper aims to improve the separation of fine solid particles in mini-hydrocyclones by changing the shape and size of the mini-hydrocyclone inlet. This study also examines the best mini-hydrocyclone inlet shape and size. Fluent software is used to simulate the flow field of the continuous and dispersion phases in different mini-hydrocyclone. The simulation results can guide the design and optimization of mini-hydrocyclones and determine the optimum inlet aspect ratio.

The Experimental Study and Numerical Simulation of the Gas Flow Field in the Cold Storage of Procambarus Clarkii

2014 ◽  
Vol 716-717 ◽  
pp. 780-784
Author(s):  
Shuo Li ◽  
Shu Cai Wang ◽  
Fang Cheng ◽  
Gao Bing Xia
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Cold Storage ◽  
Gas Flow ◽  
Procambarus Clarkii ◽  
Freezing Process ◽  
Uniform Temperature ◽  
Design And Optimization ◽  
Computational Fluid Dynamics Cfd ◽  
Simulation Results

The gas flow in the cold storage plays a very important role in the effect of cold storages of procambarus clarkii. Only the reasonable gas flow ensures the uniform temperature field.The paper uses the technique of computational fluid dynamics (CFD) to conduct the numerical simulation of the flow field and finds out the law of the distribution of the temperature field,on the basis of which the numerical simulation of non steady state of the freezing process of the frozen products is carried out.The experiments prove that the simulation results can better reflect the reality,and show that CFD tools can play an important role in the design and optimization of cold storages.

Numerical Simulation of the Inner Flow Field and the Optimal Design of Hema-Type ATY Nozzle Based on Fluent

2013 ◽  
Vol 634-638 ◽  
pp. 3774-3777
Author(s):  
Min Hua Zhang ◽  
Hong Mei Zheng ◽  
Cui Liu ◽  
Yin Hu Qu ◽  
Tao Liang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Optimal Design ◽  
Flow Field ◽  
Flow Fields ◽  
Fluent Software ◽  
Simulation Results

the inner flow fields of twelve Hema-type ATY nozzles which have different structure and parameters are simulated by the Fluent software, which is based on the CFD (Computational Fluid Dynamics) theory.Then the simulation results are analyzed，through wich the best designed nozzle is determined.

The Simulation of the Launching Process on Concentration Water Injection Launcher

2013 ◽  
Vol 419 ◽  
pp. 186-191
Author(s):  
Xiao Fei Zhou ◽  
Yi Jiang ◽  
Yu Sen Niu ◽  
Shao Zhen Yu
Keyword(s):  
Flow Field ◽  
Water Injection ◽  
Calculation Model ◽  
Two Phase ◽  
Average Temperature ◽  
Fluent Software ◽  
Simulation Results ◽  
Temperature And Pressure ◽  
Gas Liquid Flow ◽  
New Research

Simulation of the launching process in concentration water injection launcher, and get the parameter variations during the launch process, compared with traditional engineering algorithm, verify the reliability of the simulation results, given a new research method of interior ballistics on this launch system. This simulation has very important meaning for the temperature and pressure checking at the Beginning of the design. The simulation results show that,after the flow field stable,the average temperature and pressure in low-pressure chamber and the sabot are very close. This article uses the FLUENT software, use Mixture two-phase flow calculation model to solve the gas-liquid flow field, use the dynamic mesh and UDF program to simulation the flow field.

scholarly journals Influence of the Impeller Diameter and Off-Bottom Clearance on the Flow Velocity Distribution Characteristics Near the Bottom inside a Flotation Machine

Minerals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 31
Author(s):  
Shuling Gao ◽  
Lingguo Meng ◽  
Dezhou Wei ◽  
Qiang Zhao ◽  
Xuetao Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
Velocity Distribution ◽  
Flow Velocity ◽  
Solid Particles ◽  
Distribution Area ◽  
Distribution Characteristics ◽  
Low Velocity ◽  
Flotation Machine ◽  
Design And Optimization ◽  
Velocity Magnitude

The solid particle suspension inside a flotation machine is significantly dependent on the flow field, particularly the flow hydrodynamics characteristics near the bottom of the flotation machine. In this study, a laser Doppler anemometer (LDA) was utilized to investigate the influence of the impeller diameter and the impeller off-bottom clearance of a flotation machine on the flow velocity distribution characteristics near its bottom. The results showed that centripetal, centrifugal, and transitional spiral ascending vortexes were generated for different cases of the impeller variables. The impeller diameter and the off-bottom clearance were found to have a significant and interactive influence on the flow pattern, radial and axial velocities, velocity vector distribution, and axial fluctuating root mean square (RMS) velocity characteristics. When the centripetal flow was generated with a large impeller diameter and a small off-bottom clearance, the vortex stability was improved, the low-velocity distribution area was reduced near the bottom center, and the high axial RMS velocity distribution area was extended and became more consistent. The latter provided an advantageous condition for the momentum transfer between the liquid flow and the solid particles, as well as the airflow. However, the axial RMS velocity in the centrifugal flow formed in other cases of the impeller variables was less than that in the centripetal flow. Although the increase in the impeller off-bottom clearance contributed to increasing the velocity magnitude, this is certainly disadvantageous to the service life of the impeller blades, as expected from the high-velocity area extension. These results may provide a reference for the impeller design and optimization of a KYF (Kuang Yuan Flotation) flotation machine, as well as a basis for further investigation on the behavior of the dispersed phases inside a flow field.

Simulation on Three-Dimensional Flow Field of Oxidation Ditch

2012 ◽  
Vol 516-517 ◽  
pp. 1001-1005
Author(s):  
Wei Wei ◽  
Dun Qiu Wang ◽  
Jian Wen Wei ◽  
Hong Tao Zhou
Keyword(s):  
Mathematical Model ◽  
Flow Field ◽  
Three Dimensional ◽  
Oxidation Ditch ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Fluent Software ◽  
Simulation Results

Using the Fluent software, the flow field of oxidation ditch was simulated by the three dimensional turbulence mathematical model. The velocities were analyzed and measured, and the simulation results showed acceptable prediction of the velocities in the oxidation ditch. The results also showed that velocity could reach more than 0.3m/s when 8 impellers worked, and MLSS in the whole ditch were almost uniform, therefore, the oxidation ditch runs well.

The Structural Design of Nozzle in Outer Mixing Mode for Preparing Superfine Particles by SCF Technology

2011 ◽  
Vol 236-238 ◽  
pp. 1614-1618
Author(s):  
Yan Liu ◽  
Yan Peng Qu ◽  
Wei Qiang Wang
Keyword(s):  
Flow Field ◽  
Supercritical Fluids ◽  
Structural Design ◽  
Structural Characteristics ◽  
Micro Particles ◽  
Annular Gap ◽  
Fluent Software ◽  
Simulation Results ◽  
Application Fields ◽  
Nozzle Structure

Based on the creative design of nozzle structure, the application fields of the micro-particles production using supercritical fluids (SCF) can be further broaden. According to the analysis of the structural characteristics of the nozzles, a new kind of nozzle with a tunable annular gap is proposed in this research, which includes a cover, movable trays, unmovable trays, seal fittings and connecting components. By virtue of FLUENT software, the flow field of the nozzle in outer mixing mode with two passages is numerically simulated. The effects of the passing length of SCF before mixing and the height of conic convexity on the flow-field are analyzed. The simulation results show that the above length does adverse effect on enhancing mixing extent, however, the smaller height of convexity can help achieve better mixing level. Then the nozzle is redesigned in which a movable tray and an unmovable tray are removed. The improved nozzle has simple and reasonable structure and can do better work on improving gas-liquid mixing extent.

Investigation on Flow Field of Cyclone Separator Used in Circulating Fluidized Bed Boiler

2013 ◽  
Vol 807-809 ◽  
pp. 1551-1554
Author(s):  
Bing Guang Gao ◽  
Hai Xia Li ◽  
An Chao Zhang ◽  
Jun Song ◽  
Hao Lu ◽  
...  
Keyword(s):  
Flow Field ◽  
Fluidized Bed ◽  
Vortex Structure ◽  
Circulating Fluidized Bed ◽  
Swirling Flow ◽  
Reynolds Stress Model ◽  
Cyclone Separator ◽  
Stress Model ◽  
Fluent Software ◽  
Simulation Results

The Reynolds stress model (RSM) provided by FLUENT software was applied to study flow field of a cyclone separator used in some circulating fluidized bed. The pressure distribution and velocity distribution was analyzed. The simulation results reveal the strong swirling flow and vortex structure in cyclone separator.

Modeling and Simulation of Thermostatic Mixing Valve

2013 ◽  
Vol 365-366 ◽  
pp. 370-374
Author(s):  
Hai Chu Chen ◽  
Fang Yi Wu ◽  
Ping Zhang ◽  
Gen Liang Xiong ◽  
Yin Fa Zhu
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Flow Field ◽  
Modeling And Simulation ◽  
Adaptive Controller ◽  
Theoretical Research ◽  
New Type ◽  
Fluent Software ◽  
Simulation Results ◽  
The Mathematical Model

It researched a new type of intelligent thermostatic mixing valve which could keep the temperature and flux of the valve outlet water constant through the adaptive controller. It firstly established the mathematical model about angle - flux and angle - temperature of the valve. And then it based on thekεturbulence model and applied Fluent software to numerical simulation of the valve about the flow field. Finally, it compared the simulation results with the calculated value. The results show that they are basically consistent, prove the correctness of the theoretical research, and can be used to improve designing of the thermostatic valve.

Analysis and Numerical Simulation of Flow Field in Centrifugal Pump

2014 ◽  
Vol 1006-1007 ◽  
pp. 131-134
Author(s):  
Yi Jun Zhou ◽  
Hai Yang Xu ◽  
Wang Kan
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Centrifugal Pump ◽  
Static Pressure ◽  
Three Dimensional ◽  
Centrifugal Impeller ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Design And Optimization ◽  
Fluent Software

The inner flow field of centrifugal pump is complex and presents a characteristic of three-dimensional turbulence. Used Solidworks software to establish a three-dimensional model of the pump and impeller, completed the numerical simulation of centrifugal impeller flow field based on the turbulence model and Fluent software, obtained the static pressure and velocity distribution of flow field, provided basis for the design and optimization of the subsequent product.

The Effect of Inner Cylinder on Cyclone Preheater Using Fluent Software

2014 ◽  
Vol 1030-1032 ◽  
pp. 1352-1355
Author(s):  
Li Long Dong ◽  
Wei Lin Zhao ◽  
Jian Rong Wang ◽  
Zong Jun Geng
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Turbulence Model ◽  
Pressure Loss ◽  
Gas Flow ◽  
Particle Trajectory ◽  
Cement Plant ◽  
Thermal Data ◽  
Fluent Software ◽  
Simulation Results

The paper presented the gas flow field and particle trajectory with a series of inner cylinders in cyclone preheater using RNG k-ε turbulence model and stochastic trajectory model on the platform of Fluent software. The separability and pressure loss of cyclone preheater were investigated. The result shows the ratio of d/D and h/H of cyclone preheater was advised 0.50 to 0.65 and 0.35 to 0.60 respectively. It is also found that the numerical simulation results are in agreement with the thermal data of cement plant.

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