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Exploring the Effect of Length and Angle on NACA 0010 for Diffuser Design in Tidal Current Turbines Nasir Mehmooda, Zhang Liangb and Jawad Khanc College of Ship Building Engineering, Harbin Engineering University, Harbin, Heilongjiang, China athatsnasir@live.com, bzhangliang@hrbeu.edu.cn, cjawadkhan2008@hotmail.com Keywords: Diffuser augmented tidal turbine; Ducted turbine; Shrouded turbine; Numerical simulation of diffuser; CFD simulation of diffuser Abstract.
Numerical simulation of velocity profile at the throat is presented in detail.
This research serves as foundation for using CFD tools for diffuser design for tidal current turbines.
The simulation is carried out using commercially available software Ansys CFX.
Liang: CFD Study of 2D Model of Diffuser for Harnessing Tidal Energy, Advanced Materials Research Vol. 482-484, p. 2270-2274.

Velocity and Sludge Distribution Simulation of the Aerobic Tank of Step-Feed A/O Process Shen Zhao1, a, Xue-yi You1, b , Sheng-jun Liu 2, c , Yu Huang2, d , Feng Shi2, e and Hong-bo Lu2,f 1School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China 2Municipal Engineering Design Institute Co., Ltd. of Northwest China, Lanzhou 730000, China atowntoonzhaoshen@hotmail.com, bxyyou@tju.edu.cn, cxbylsj@163.com, dxbyhuangyu@163.com, exbysf@163.com, fxbylhb@163.com Keywords: CFD; aerobic tank; velocity distribution; sludge distribution Abstract.
Introduction The Computational Fluid Dynamics (CFD), an important branch of fluid mechanics, obtains the flow field information by solving the continuous and momentum equations of fluid.
In this study, based on the CFD technology, the model of the aerobic tank of the step-feed A/O process was built.
Gambit software was applied to the meshing of the models and the grid independence was tested before the simulation.
Influence of the aeration on the sludge distribution at horizonal planes (a) surface layer; (b) middle layer; (c) bottom layer (Left for the simulation without aeration and right for the simulation with aeration) Conclusions The wastewater-sludge flow and the aeration process were simulated by the two-phase model and the discrete phase model.

The Numerical Simulation of Combustion On Vinegar Residue in a biomass Boiler Aiping Shi1, a, Qian Ma1,b and Yinli Zhang2,c 1Department of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China 2Dacheng Engineering Co.Ltd of Taiyuan University of Technology, Taiyuan 030032, China ashiaiping1968@126.com, bmq9987@126.com, c408264017@qq.com Keywords: Vinegar Residue; Combustion; Numerical Simulation Abstract: Numerical simulation had been used to study the combustion characteristic of vinegar residue in a straw-fired boiler in this paper.
Achievement of the paper was based on a kind of CFD.
In this paper, numerical simulation on combustion of vinegar residue in the biomass boiler was researched, to provide some reference parameters for the effective use.
Straw combustion simulation and test research had been done before.
The CFD prediction was carried out using fluent 6.3.

Computational Fluid Dynamics CFD, based on a finite volume method, is completed by utilizing the standard k-ε turbulence model.
In the present research, the simulations are performed using the commercial software ANSYS version 16.1.
It is found that the 126561-grid element is convenient for the CFD (less deviation).
The simulations are conducted to study the velocity and pressure distribution using three different twist ratios (y\w = 0.6, 0.7, and 1).
"Simulation of heat transfer in a tubular pipe using different twisted tape inserts".

Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving.
In this paper, we use the FLOTRAN CFD analysis of ANSYS software to comparative study in the different position of vice nozzle, so as to attempt to find a better distance between vice nozzle and main nozzle which can improve the sensitivity of fluidic gyroscope.
Fig. 3 The nozzle array structure Fig. 4 Two-dimensional simplified models of sensitive cavity Solve with Finite Element Method The FLOTRAN CFD analysis of ANSYS software is an advanced tools used to study two dimensional and three dimensional flow fields, the simulation typically comprises modeling, loading and solving [3-4].
Select FLOTRAN CFD analysis of ANSYS software.
Wang: Numerical simulation of practical engineering in ANSYS (Northwestern Polytechnical University Press, China 1999)

For an axial flow maglev blood pump, based on CFD, using k-ε model, unstructured mesh, establishing the whole flow channel model, a three-dimensional numerical simulation of axial flow maglev blood pump was carried.
Simulation results show that: the port clearance ratio δ=0.75, the flow channel gap h = 2.5mm, blade height b = 1.8mm, the optimal performance was attained.
Three-dimensional numerical analysis was performed by commercial CFD software ANSYS FLUENT.
(3) Though analyzing CFD results, the structure of blood pump was designed.
Numerical simulation and comparative analysis of flow field in axial blood pumps.

Nowadays, numerIcal sImulatIon (often called computatIonal fluId dynamIcs, CFD) has been wIdely accepted owIng to Its advantage of the tremendous progress of computer capabIlItIes In recent years, and the advances In numerIcal modelIng.
Some of problems related to CFD In wInd engIneerIng are governIng equatIon dIscretIzatIon, turbulence model selectIon, numerIcal scheme, and the InItIal and boundary condItIons.
Developments In CFD for IndustrIal and envIronmental applIcatIons In wInd engIneerIng.
Urban wInd flows: wInd tunnel and numerIcal sImulatIons — a prelImInary comparIson.
NumerIcal sImulatIon of atmospherIc flow over complex terraIn.

The calculation of thermo-chemical flow was solved by the CFD software FLUENT to provide the heat load boundary for simulation of heat transfer of EPDM insulation.
The simulation results can provide the temperature rising trend of insulation in a certain extent.
The research here is carried out by the numerical simulation and ground test.
The internal flow field of secondary combustion chamber of ramjet is simulated by commercial CFD software FLUENT.
The three-dimensional thermo-chemical flow of chamber was solved by the CFD software FLUENT.

The CFD grids domain is subdivided into subdomains for parallel computation.
In recent years, Computational Fluid Dynamics (CFD) coupling with Computational Structural Mechanics (CSD) is developed to study the aeroelastic problem based on numerical simulation of fluid-structure interaction calculation.
The complexity and computational workload are very huge in the numerical simulation of three-dimensional aeroelastic problem.
We must improve computational efficiency of the programs to make the time of long simulation process to be acceptable.
CFD parallel computing.

Numerical Simulation of Traffic Emissions in Urban Street Canyon Peng Wanga, Daiqing Zhao, Guotian Cai, Cuiping Liao Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, China aemail: energyx@qq.com; wangpeng@ms.giec.cas.cn Keywords: Numerical Simulation; Street Canyon; FLUENT; Leeward and Windward; Clockwise Vortex; Turbulent Model.
The simulation results were compared with the available wind tunnel experiments and favorable agreement was found.
The FLUENT CFD package has been configured to solve the Navier-Stokes equations for the mean flow in street canyons for various street intersections using the standard k-ε turbulence model, which was presented by [12].
Flow simulation.
Present simulation study suggests that the three dimensional and transient effects are important in modeling the airflow pollutant transport in street canyons.