scholarly journals Separation Characteristics of an Axial Hydrocyclone Separator

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2288
Author(s):  
Jie Kou ◽  
Zhaoming Jiang ◽  
Yiying Cong
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Velocity Distribution ◽  
Pressure Distribution ◽  
Concentration Distribution ◽  
Guide Vane ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Tangential Inlet

An innovative axial hydrocyclone separator was designed in which a guide vane was installed to replace a conventional tangential inlet, potentially aggravating inlet turbulence. The characteristics of velocity distribution, concentration distribution, and pressure distribution inside the separator were obtained through the numerical simulation of the turbulent flow of oil and water. The results showed that the flow field presented good symmetry, which eliminated the eccentric turbulence phenomenon in the conventional hydrocyclone separators and was beneficial for the oil–water separation.

Comparison of Different Grid Structures for the Hydrocyclone Flow Field Simulation

2013 ◽  
Vol 353-356 ◽  
pp. 3399-3402
Author(s):  
Guang Dong Guo ◽  
Song Sheng Deng ◽  
Wei Xing Hua
Keyword(s):  
Flow Field ◽  
Single Phase ◽  
Unstructured Grid ◽  
Water Separation ◽  
Memory Space ◽  
Structured Grid ◽  
Oil Water Separation ◽  
Oil Water ◽  
Hybrid Grid ◽  
Made In

In the CFD(computational fluid dynamics) study of hydrocyclones, the grid is a important factor to predicting the flow field. An attempt has been made in this study, in the same turbulence model and boundary conditions, three different structures of grid, the structured grid, the unstructured grid and the hybrid grid, are compared for the predictions of the axial, radial and tangential velocities. It has been observed that the memory space structured grid is large, and there are much number grid of the unstructured grid. The structured grid led to an improved turbulence field prediction and thereby to predict the velocity fields of single phase flow field more accurately. The unstructured grids is used to simulate the process of oil-water separation.

Oily Water Treatment Using Ceramic Membrane in Presence of Swirling Flow Induced by a Tangential Inlet via CFD

2014 ◽  
Vol 348 ◽  
pp. 51-57 ◽  
Author(s):  
Tássia Vieira Mota ◽  
Helton Gomes Alves ◽  
Severino Rodrigues Farias Neto ◽  
Antônio Gilson Barbosa de Lima
Keyword(s):  
Ceramic Membrane ◽  
Volume Fraction ◽  
Ceramic Membranes ◽  
Particle Model ◽  
Water Separation ◽  
Significant Difference ◽  
Oil Water Separation ◽  
Oily Water ◽  
Oil Water ◽  
Tangential Inlet

In recent years, attention has been given to the processes controlling the emission of oily effluents and their environmental impact. Many industrial processes generate large volumes of water contaminated with oil, called oily waters. The oily water must be treated before its discard in order to meet the criteria established by environmental agencies (for example in Brazil, 20 mg/L). In present days, the process of separating oil/water with ceramic membranes has attracted the attention of many researchers [1,2]. In this sense, the aim of this study is to evaluate the influence of the tangential inlet shape in the oil/water separation via ceramic membranes. We use a mathematical multiphase flow model to describe the oil-water separation, based on the particle model. Here oil is the dispersed phase while water the continuous phase. To model the turbulence effect we use the RNGk-εmodel. All simulations were carried out using the Ansys CFX ® commercial code. Results of streamlines and velocity, pressure and volume fraction of phase fields are present and analyzed. The numerical results indicate that no significant difference when using a circular or rectangular pipe with the same cross-sectional area.

Numerical Simulation on Flow Field of Screen Filter for Drip Irrigation in Field

2012 ◽  
Vol 212-213 ◽  
pp. 1197-1200 ◽  
Author(s):  
Quan Li Zong ◽  
Tie Gand Zheng
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Velocity Distribution ◽  
Pressure Distribution ◽  
Drip Irrigation ◽  
Radial Direction ◽  
Turbulent Energy ◽  
Head Loss ◽  
Turbulent Pressure ◽  
High Turbulence

Based on CFD software Fluent, the flow field of screen filter was simulated numerically，and the results of calculation were analyzed in detailed. The results show that the velocity distribution declines along the radial direction of tank. The flow can be rotated and mixed in tank, and the screen of outlet can be clogged quickly resulting in uneven clogging. The turbulent pressure distribution of filter is not uniformity. In the inlet, the turbulent energy is larger than the second tank. In the inlet of second screen, there is a high turbulence region resulting in the larger head loss. The pressure distribution of the second tank is uniformity in the course of filter work. However, the pressure of the first tank is significantly higher than the second one.

Effect of geometry on flow field and oil/water separation in vertical deadlegs

2005 ◽  
Vol 15 (4) ◽  
pp. 348-362 ◽  
Author(s):  
M.A. Habib ◽  
S.A.M. Said ◽  
H.M. Badr ◽  
I. Hussaini ◽  
J.J. Al‐Bagawi
Keyword(s):  
Flow Field ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Numerical Simulation of Internal Flow Field in Mixed Flow Fan

2013 ◽  
Vol 860-863 ◽  
pp. 1589-1593
Author(s):  
Yan Zhao Zhai ◽  
Hong Ming Zhang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Velocity Distribution ◽  
Pressure Distribution ◽  
Three Dimensional ◽  
Internal Flow ◽  
Field Structure ◽  
Mixed Flow ◽  
Flow Phenomenon ◽  
Impeller Outlet

The numerical simulation of internal flow field of a mixed-flow fan was carried out on the star-CD platform. Three-dimensional steady turbulent flow is calculated using the standard k-ɛ turbulence model, and the pressure distribution, velocity distribution and other important flow phenomenon inside the fan are obtained. The number of meshes has important influence on the result, meanwhile, fan inlet, impeller, outlet interact with each other. The results of numerical simulation can accurately analyze the fan flow field. The results of numerical simulation can accurately analyze the fan flow field structure, and provide guidance for further optimization and improvement of the fan.

Design and Analysis for Partition Plate of Gravity Oil-Water Separator

2014 ◽  
Vol 675-677 ◽  
pp. 669-673
Author(s):  
Hong Jun Liu ◽  
Guang Zheng Jia ◽  
Yong Peng Cai ◽  
Shi Peng Chen
Keyword(s):  
Flow Field ◽  
Internal Structure ◽  
Velocity Vector ◽  
Separation Efficiency ◽  
Water Separation ◽  
Water Separator ◽  
Oil Water Separation ◽  
Working Principle ◽  
Oil Water

The internal structure and the working principle of gravity oil-water separator used for self-circulation well-flushing equipment were given. Based on CFD, the flow field was calculated and analyzed with partition plate settings. The influences on separation efficiency were analyzed, according to velocity vector diagrams and oil drop trajectory diagrams. The results show that the location of the primary partition plate is installed more reasonable, the efficiency of separation is more advantage. Also, the structure and size of the primary partition plate and the size of the auxiliary partition plate can influence the efficiency of oil-water separation regularly.

scholarly journals Numerical simulation method of marine oil-water separation

2021 ◽  
Vol 25 (6 Part A) ◽  
pp. 4035-4042
Author(s):  
Yunfeng Li ◽  
Yuting Li
Keyword(s):  
Numerical Simulation ◽  
Oil Pollution ◽  
Reference Method ◽  
Simulation Method ◽  
Separation Performance ◽  
Water Separation ◽  
Marine Oil ◽  
Numerical Simulation Method ◽  
Oil Water Separation ◽  
Oil Water

In order to reduce the frequency of marine environmental pollution accidents, marine oil-water separation numerical simulation method is developed. The oil-water separation hydrocyclone is used for emergency treatment to deal with the marine surface oil pollution, and the oil-water separation optimal control parameter calculation method based on the mathematical model of the flow field is used to simulate the oil-water separation performance of the device. The simulation results show that when the split ratio is 4.1%, the inlet pressure is 0.15MPa, the overflow pipe diameter is 3 mm, the oil droplet size is 101, and the large vertebral angle is 27, the hydrocyclone has good separation performance. Under these conditions, this method can be used as a reference method for dealing with oil spills in the ocean and has certain application value.

Sign in / Sign up

Export Citation Format

Share Document