Search results

University of Feres Yahia, Medea, Algeria aboualemlaribi@yahoo.com, blmp2m_cum@yahoo.fr Keywords: Turbulence, CFD, flow meter, flow conditioner, Navier-Stokes, k-ε.
For the simulation, code CFD Fluent was used.
The numerical analysis is conducted by the CFD Fluent code [7].which is based on the resolution of the Navier-Stokes equations with k-ε like turbulence model.
Experimental Facility for the Simulation Our installation, Fig. 1, consists of an inlet pipe length 10D, followed by disturbers 90° double bend, or a valve, or a Tee, Fig. 2.
The effectiveness of CFD code Fluent to predict flow development in different installations is done where good predictions are presented.

Numerical Simulation of Turbulent Mixing for Dislocated Blades in a Stirred Tank Lei shi1,a, Shenjie Zhou1,b, Fengling Yang1,c and Fanjin Hu1,d 1School of Mechanical Engineering, Shandong University, Jinan, Shandong 250061, China ashileishanda@163.com, bzhousj@sdu.edu.cn, cfly@sdu.edu.cn,dhufanjin2008@yahoo.com.cn Keywords: dislocated blades, mixing process, numerical simulation.
In this study, CFD technology was used to simulate the mixing process inside the stirred tank with dislocated blades and standard turbine.
In this study the CFD simulation was carried out with the MRF method, because the precision of prediction of flow field with using the MRF method is correspond to the calculations with the SM method, while less amount of calculation [7].
The standard k–ε model was also used for the simulation.
Conclusion According to CFD, the study of numerical simulation has been carried out in turbulent mixing process of the dislocated blades.

Barnsley and Narramore[2, 3]have researched the dynamic stall in a wind turbine by means of CFD method.
Meanwhile, Voutsinas[5]have focused on the flow field in yaw through the CFD method.
Among them, the "CFD" as theFluent software numerical results; "EXP" as the experimental value, the following chart is the same.
Results show that the tangential force coefficient, normal force coefficient and the pressure distribution of the section, the accord well with those of CFD calculation value and experimental value, proved this method of CFD analysis is reliable accuracy.
Navier-Stokes simulation of the NREL combined experiment Phase II rotor[C].

Hence, with the development of computer and numerical method, more and more researchers started to use computer simulation to investigate.
In the computer simulation, most of them used the dynamic model to investigate the performances of various PRVs [4, 5].
CFD domain meshing valve Fig. 4.
The CFD Pressure Fields.
[4] Asok Ray, Dynamic modeling and simulation of a relief valve, SIMULATION, Vol. 31, No. 5, 1978, 167-172

The study aims to carry out highly accurate CFD simulations of passive flow control devices, namely, the micro-ramp in order to provide detailed insights into the flow field.
Computational Methodology The micro ramp model considered for our CFD analysis is shown in Fig. 1.
The 3-D simulations were carried out using the commercial software ANSYS FLUENT 14.
The results obtained from CFD are strongly supporting the experimental results.
Flow structures obtained using CFD simulation are compared with available experimental data.

CFD Simulation of Natural Draught Cooling Tower Wind-Covering Masoud Darbandi1,a, Hossein Salemkar1,b, Ali Behrouzifar1,c, Bagher Abrar1,d 1Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran adarbandi@sharif.edu, bsalemkar@mehr.sharif.edu, cbehrouzifar@ae.sharif.edu, dbagher_abrar@ae.sharif.edu Key words: Natural draught cooling tower- Industrial chimney- Wind covering effect- CFD Abstract.
Meroney [4] also utilized CFD and elaborated some more points on the wind covering effects.
Cooling tower modeling and simulations To start the computational fluid dynamics simulation, we should construct a cooling tower model.
Behnia: The performance of natural draft dry cooling towers under crosswind: CFD study.
Meroney: CFD Prediction of Cooling Tower Drift Prepared.

Ship Hull and Free Surface Panels Fluent CFD The commercial CFD software FLUENT version 6.2.16 is utilized for the computations in the present study.
A hybrid unstructured mesh consisting of about 1.7 million cells was generated for the present simulations.
This corresponds to a numerical simulation of the resistance or propulsion model test.
CFD could have saved considerable costs and times.
Both CFD codes, i.e.

The Computational Fluid (CFD) technology has been successfully used in the numerical simulation of the turbulent flow of centrifugal pump.In this article , we carry on the experiment by using uses ANSYS software,based on the standard k-ε model, SST model and BSL model , to get the the flow field of the numerical simulation of the impeller .We found that the simulation results and the actual results are different under different turbulence models.
The impellers is also the most important flow components of the Centrifugal pump.The impellers can directly change the original motivation mechanical energy to the liquid in order to increase the static pressure and kinetic energy of the liquid.So how to improve the performance of its hydraulic pump efficiency has great significance in improving its efficiency. [1].In recently,the CFD analysis techniques has been widely applied and gradually improved in fans, pumps and many other industries [2].In addition ,the CFD analysis techniques has slao become an important method to the pump body CFD numerical simulation of flow field for the optimization of pump [3,4,5,6,7].Furthermore, a large number of engineering in practice has proved that the numerical simulation results are quite reliable [8].However,the result of which model is most consistent with the practice is still a problem needed to be discussed.
But such errors belong permissible error, but also further validate the simulation accuracy.
[2] Zeng Yong zhong, Liu Xiao bing based Fine pump flow field numerical simulation [J].
Numerical simulation and large water pumping station hydraulic optimization [J].

Based on the flow fluid simulation of incompressible flow, according to the design parameters of water hydraulic slide valve, CFD software Fluent is used to simulate and analyze the flow characteristics of water hydraulic slide valve.
The simulation model of Slide valve with rectangular openings has been built, and different combinations of boundary conditions are specified to make comparisons so as to ensure the correctness of the simulation.
In order to design an applicable water hydraulic servo valve, it's necessary to study the factors which influence the static characteristics of the slide valve with CFD software Fluent.
CFD simulations can avoid the construction and testing of many prototypes, and then reduce the R&D cost and time, and the accuracy has been confirmed on many occasions [2,3].
Simulation Model of Slide Valve with Rectangular Openings Evaluation Conditions.

In this work, CFD simulations of FSP are first carried out to predict microstructural evolution in stirred, transition and heat affected zones of AZ31 Mg alloy sheets.
Numerical Modeling CFD Modeling of FSP.
Results and Discussion FSP Simulation Results.
Superplastic Forming Simulation Results.
CFD simulations coupled with Zener-Holloman relation were used to accurately model friction stir process and predict metallurgical aspects of processed sheets.