3D Numerical Simulation of Inner Water Flow Field in a Hydrocyclone with Air Column

2011 ◽  
Vol 71-78 ◽  
pp. 2107-2111
Author(s):  
Hui Li ◽  
Xiao Jun Guo
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Water Flow ◽  
Field Distribution ◽  
Three Dimensional ◽  
Experimental Result ◽  
Computational Fluid Dynamics Cfd ◽  
Solid Liquid ◽  
Solid Liquid Separation ◽  
Air Column

Based on the principle and method of computational fluid dynamics (CFD), using the software, FLUENT, the inner water flow field in a hydrocyclone with air column was simulated and the flow details were studied roundly. This article analyzed the three-dimensional velocity field distribution, pressure field distribution and testified the reliability of numerical simulation to a certain extent. The “mixture” model was used to simulate the air column the first time and contrasted with experimental result, the simulated effect was proved effective. The results of this paper provided a good base and reference for the further research of solid-liquid separation.

The Numerical Simulation of the Flow Field in the Underground Hydrocyclone

2013 ◽  
Vol 655-657 ◽  
pp. 470-475
Author(s):  
Jing Chang Wang ◽  
Fu Lai Guo ◽  
Meng Hua Wu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Field Distribution ◽  
Phase Distribution ◽  
Three Dimensional ◽  
Internal Flow ◽  
No Formation ◽  
The Media ◽  
Solid Liquid ◽  
Air Column

For preventing sand in underground oil, this paper structures a model of hydrocyclone with the inside cyclone and the outside one seriesing and describes how it works. By the TGrid procedures, the all of the hydrocyclone is meshed with the tetrahedral and the boundary conditions are determined. The methods of Three-dimensional numerical simulation in FLUENT are used to simulate the velocity field distribution, the pressure field distribution, the path lines of the separated medition characteristics of the separated medium and the phase distribution of the medium. The affect of the internal separated medition characteristics to the separated performance is analysed. Through the simulation, it is found that the spiral fin in the hydrocyclone can guide the fluid to produce a vortex flow to meet the purpose of separating the solid-liquid. There is no formation of the air column comparing with the conventional cyclone, so the internal flow field is more stable to conductive to the separation of the media. It provides a basis for the improvement of the cyclone.

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.

Numerical Simulation of Flow Process of Ammonium Persulfate Crystallizer

2014 ◽  
Vol 997 ◽  
pp. 396-400
Author(s):  
Yu Guang Fan ◽  
Ting Wei
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Three Dimensional ◽  
Ammonium Persulfate ◽  
Flow Process ◽  
Calculation Results ◽  
Crystallization Effect ◽  
Computational Fluid Dynamics Cfd ◽  
The Impact ◽  
Selection Of

The method of computational fluid dynamics (CFD) is used to three-dimensional numerical simulation for the fluid flow process of ammonium persulfate crystallizer. By using standard model, this paper respectively simulated the flow field within the crystallizer in the impeller installation height of 1.2 m while stirring speed is of 60 r/min, 100 r/min and 200 r/min; and simulated the impact of the flow field inside the crystallizer when the stirring speed of 100 r/min and impeller installation height respectively is of 0.7 m, 1.2 m and 1.7 m. That calculation results show that: the velocity gradient is mainly concentrated in the area of internal draft tube and paddle around. With the increase of impeller speed, the flow velocity of the fluid within the crystallizer corresponding increases; and the energy also gradually decreases from mixing impeller to the settlement zone with the loss of the installation height, and the kinetic energy in the bottom of the crystallizer is reduced. Considering the energy and crystallization effect, selection of mixing speed of 100 r/min or so and installation height of about 1.2 m is more appropriate.

Numerical simulation of three dimensional flow in Yazidang Reservoir based on image processing

2020 ◽  
Vol 39 (2) ◽  
pp. 1591-1600
Author(s):  
Lingxiao Huang ◽  
Qiao Qiao ◽  
Lanxiang Zheng ◽  
Libo Liu ◽  
Wenjuan Zhao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Flow Field ◽  
Water Flow ◽  
Three Dimensional ◽  
Water Area ◽  
Image Edge Detection ◽  
Detection Technology ◽  
Processing Accuracy ◽  
Image Edge

In order to study the water flow movement of the Yazidang Reservoir, this paper generates the initial terrain for the researched water area with the image stitching technology and image edge detection technology, establishes a 3D k - ɛ mathematical model, solves the equations discretely by FVM and SIMPLEC algorithms, studies the numerical simulation of the water flow movement of the reservoir under four working conditions, and analyzes the flow field on the surface and at the bottom of the reservoir. The results show the improved terrain pre-processing accuracy and efficiency of the researched water area and the rationality of the water flow field and rate simulation results, which means that the established 3D turbulence mathematical model can be applied to the numerical simulation of the reservoirs similar to the Yazidang Reservoir. The numerical simulation of 3D turbulence in Yazidang Reservoir provides a theoretical basis and practical application value for the numerical simulation of similar reservoirs.

Research on the Numerical Simulation of Internal Flow Field and Energy Efficiency of Ventilator

2015 ◽  
Vol 713-715 ◽  
pp. 602-605
Author(s):  
Zhu Jue Tong ◽  
Xiao Ling Wang ◽  
Kai Zhang ◽  
Shu Xing Wu
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Energy Efficiency ◽  
Flow Field ◽  
Three Dimensional ◽  
Internal Flow ◽  
Secondary Flows ◽  
Local Flow ◽  
Gap Flow ◽  
Computational Fluid Dynamics Cfd

In the present study, the effects of ventilator geometries on the its performance were numerically simulated using the computational fluid dynamics (CFD) program. For a certain type ventilator, three-dimensional inner flow field was derived firstly, such as local flow field at the meridional and rotary plane of ventilator, the gap flow between the impeller and air outlet, and the secondary flows in impeller channel were studied in detail, and some suggestions are given to improve the profile of velocity. The above results would be helpful to the optimization and modification of ventilator.

Numerical Simulation and Vibration Analysis of Inner Flow Field for Lage-Sized Throttle Valve

2012 ◽  
Vol 233 ◽  
pp. 154-157
Author(s):  
Guo Qin Huang ◽  
Ying He ◽  
Jin Yu
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Flow Field ◽  
Vibration Analysis ◽  
Fluid Velocity ◽  
Three Dimensional ◽  
Control Valve ◽  
Flow Area ◽  
Throttle Valve ◽  
Computational Fluid Dynamics Cfd

Based on the computational fluid dynamics(CFD) technique, the three-dimensional inner flow field of a large-sized throttle valve was built and the dynamics characteristics of the control valve were analyzed. The results indicate that the main reason for the spool and valve vibration was the cavitations at the spool and the whirlpool flow at the outlet of the valve, and the fluid velocity rises as the decreasing of the flow area at the same opening. The research f indings will provide the theory basis for the later throttle valves development and optimization with littler vibration and higher efficiency.

3D Numerical Simulation of the Fluidized Bed’s Cold Distributor

2011 ◽  
Vol 71-78 ◽  
pp. 2112-2115 ◽  
Author(s):  
Hui Li ◽  
Xin Hui Ma
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Fluidized Bed ◽  
Field Distribution ◽  
Pressure Field ◽  
Three Dimensional ◽  
3D Numerical Simulation ◽  
Excessive Pressure ◽  
Good Advice ◽  
Computational Fluid Dynamics Cfd

Because of excessive pressure loss when the gas went through distributor in fluidized bed (FB), based on the principle and method of computational fluid dynamics (CFD), using the software, FLUENT, the inner flow field in the fluidized bed with distributor was simulated. This article analyzed the three-dimensional velocity field distribution, pressure field distribution under the different arrangement of hole form. and the good advice was given on the structural optimization of the cold distributor.

Two-Phase Flow Field Numerical Simulation in Scrubber for Exhaust Gas Desulfurization

2014 ◽  
Vol 541-542 ◽  
pp. 1288-1291
Author(s):  
Zhi Feng Dong ◽  
Quan Jin Kuang ◽  
Yong Zheng Gu ◽  
Rong Yao ◽  
Hong Wei Wang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Flue Gas ◽  
Two Phase Flow ◽  
Three Dimensional ◽  
Flue Gas Desulfurization ◽  
Parameter Design ◽  
Phase Flow ◽  
Two Phase ◽  
Entrance Angle

Calculation fluid dynamics software Fluent was used to conduct three-dimensional numerical simulation on gas-liquid two-phase flow field in a wet flue gas desulfurization scrubber. The k-ε model and SIMPLE computing were adopted in the analysis. The numerical simulation results show that the different gas entrance angles lead to internal changes of gas-liquid two-phase flow field, which provides references for reasonable parameter design of entrance angle in the scrubber.

Numerical and Experimental Evaluation of Turbulent Flow in Volute

2003 ◽  
Author(s):  
Akitomo Igarashi ◽  
Kazuyuki Toda ◽  
Makoto Yamamoto ◽  
Toshimichi Sakai
Keyword(s):  
Numerical Simulation ◽  
Cross Section ◽  
Three Dimensional ◽  
Experimental Result ◽  
Centrifugal Fan ◽  
Flow Conditions ◽  
Flow Angle ◽  
Fan Performance ◽  
Centrifugal Fans ◽  
Good Agreement

The performance of centrifugal fans is considerably influenced by the design of tongue at the re-circulation port. The flow in the volute of a centrifugal fan was studied both experimentally and numerically. In this experiment, flow angle, pressure and velocity profiles were measured at a large number of locations in the volute. The flow field in the volute passage was analyzed using Computational Fluid Dynamics. The flow was assumed to be three dimensional, turbulent and steady. The numerical simulation produced qualitatively good agreement with the experimental result. The results from experiment and numerical simulation indicated that the adoption of a re-circulating flow port improved fan performance for all flow conditions. In addition, the existence of strong secondary flow was apparent at the cross-section of the volute passage.

Numerical Simulation and Experimental Verification of the Deposition Concentration of an Unmanned Aerial Vehicle

2019 ◽  
Vol 35 (3) ◽  
pp. 367-376 ◽  
Author(s):  
Qiang Shi ◽  
Hanping Mao ◽  
Xianping Guan
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Unmanned Aerial Vehicle ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Utilization Rate ◽  
Droplet Deposition ◽  
Aerial Vehicle ◽  
Motion Characteristics

Abstract. To analyze the droplet deposition under the influence of the flow field of an unmanned aerial vehicle (UAV), a hand-held three-dimensional (3D) laser scanner was used to scan 3D images of the UAV. Fluent software was used to simulate the motion characteristics of droplets and flow fields under the conditions of a flight speed of 3 m/s and an altitude of 1.5 m. The results indicated that the ground deposition concentration in the nonrotor flow field was high, the spray field width was 2.6 m, and the droplet deposition concentration was 50 to 200 ug/cm2. Under the influence of the rotor flow field, the widest deposition range of droplets reached 12.8 m. Notably, the droplet deposition uniformity worsened, and the concentration range of the droplet deposition was 0 to 500 ug/cm2. With the downward development of the downwash flow field, the overall velocity of the flow field gradually decreased, and the influence interval of the flow field gradually expanded. In this article, the droplet concentration was verified under simulated working conditions by a field experiment, thereby demonstrating the reliability of the numerical simulation results. This research could provide a basis for determining optimal UAV operating parameters, reducing the drift of droplets and increasing the utilization rate of pesticides. Keywords: Unmanned aerial vehicle (UAV), Aerial application, Downwash flow field, Droplet deposition, Simulation analysis.

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