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It has become apparent that the result of simulation has been provided a theoretical basis for its optimization guiding to improvement.
This paper involved numerical simulation with the flow field in the spray nozzle to adopt CFD (Computational Fluid Dynamics) method.
The Results Analysis of Simulation 3.1 The factors Affect Convergence The studying team selected three typical size of model to simulate in the FLUENT simulation analysis.
In view of the above model, experiments show than the calculation of the model A was convergent after the 150 iterative steps. 3.2 The Simulation Results of Flow Field The simulation results series nephogram of model A, B and C’s main surface velocity were generated after the FLUENT ‘s calculation.
The Numerical Simulation Study of the Inner Flow in the Air-assisted Hydraulic Ultra-low Volume Sprayer Device.

The Passive Ventilation Energy-saving Strategies of Urban Long-distance Bus Station Guohua Tian1,a, Tingshen Li2,b, Xianguang Gu3,c and Xingyu Xie4,d 1JiangSu Institute of Architectural Technology, Xuzhou, Jiangsu, 221008, China 234School of Mechanics & Civil Engineering ,China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China atgh0208@163.com, b407255050@qq.com, c24915017@qq.com, d827777615@qq.com Keywords: Bus Station, Passive Ventilation, CFD Abstract.
General layout and some perspectives of the station Simulation analysis of ventilation status The article chooses the waiting hall as the main study object, to simulate and analyzes Xuzhou Long-distance Passenger South Station.
Fig.2 shows the simulations of the station, because the first layer connects with the distribution hall, the entrance can bring fresh air to the interior, with the outlet disposed in parallel, to improve the level of air flow to some extent.
Now, it is necessary to quantify the simulation analysis to verify the accuracy of above strategies.
The results of simulation analysis: Fig.7.

Simulation model of fan cavity hydrostatic thrust bearing, three-dimensional mathematical model in guide rail is set up.
Using CFD principle, FIUENT and ANSYS Workbench software, temperature field, pressure field and deformation field of hydrostatic bearing is simulated.
Finite element numerical simulation in the application of hydrostatic bearing design [J]. bearings2005,(11):1-3 [3] ZHANG Yan-qin, YU Xiao-dong.
Numerical simulation of temperature field in large size hydrostatic bearing[J].
Numerical simulation analysis of sector and circular oil recess temperature field of heavy hydrostatic[J].

In this study, the air flow field of a swirl die melt-blowing process was simulated by CFD software, Fluent 6.3.
Experiments and Simulation The experiments were performed on the single-orifice melt-blowing device.
(c) is the computational domain and boundary conditions for the air flow field simulation.
All the simulations were run using the SST k-ω model with default parameter settings.
Air Flow Field Profile Fig. 2 shows the simulation pathline of the air from the inlets.

The Steady flow simulation to selected the delta wing model for different angles of attack in the Maher number.The law of flow field changes with the angle of attack is gotten.Through the FLUENT simulation,The variation tendency of coefficient of lift and drag in the different angle of attack is gotten.Further reveals the change rule of Maher number, pressure, velocity and other parameters in the different angle of attack.With increasing angle of attack, Maher number distribution is sparse of the same position increases and the greater numerical.the distribution of velocity vector is sparse of the same position increases and the greater numerical.the pressure distribution is sparse of the same position increases and the greater numerical.
The master equation of numerical simulation to the wing spoiler can use Euler equation can also use N-S equation.
The fluid is compressible ideal gas, the set up of outer boundary condition according to the “far field pressure”.The far field pressure boundary condition:For the simulation of infinite free compressible flow,the free stream Mach number and static conditions known.
Summary From the simulation results we can get the following conclusions
[2] Zhang Jun,Zhao Feng,Zhou Lian Di et al.Flow visualization experiments and CFD simulation on flow around airfoil at large attack angle,J.Ship building of China Vol.41 (2000),p. 22-27

Numerical simulation study of the influence of structural parameters of combustion chamber on in-cylinder flow field of diesel engine Guocheng Li 1,a, Ping Sun 1,b, Peng Hu 1,c 1School of automobile and traffic engineering, Jiangsu University, Zhengjiang, China 212013 aguowuhappy@sina.com, bsunping@ujs.edu.cn, chptmisme717@126com.cn Keywords: Diesel engine; In-cylinder flow; Combustion chamber; Structural parameter Abstract: Based on the entity model of the type 4B26 diesel engine, calculated by CFD FIRE and combined with the software BOOST for the initial boundary conditions, the influence of combustion chamber structural parameters, such as boss height, surface-volume ratio and diameter-depth ratio of combustion chamber, on in-cylinder flow field of diesel engine was investigated.
According to Boost software, in the simulation result, the air inlet temperature, pressure and swirl ratio is taken as 385K, 0.18MPa and 2.03 respectively.
In Fire software, the gas flow simulation in the design cylinder solves the average transportation according to the mass conservation, momentum conservation and component conservation and the relatively accurate k-ζ-f turbulent flow model is adopted.
[2] Luo Maji,Wen Zui,Liu Gaofei,et al.numerical simulation of intake compression process for non-road diesel.Journal of Wuhan University of Science and Technology,2010,32(10):91~95 [3] AVL Fire User Manual[R].AVL List GmbH Graz,2002
[4] Luo Maji,Wen Zui,Liu Gaofei,et al.numerical simulation of intake compression process for non-road diesel.Journal of Wuhan University of Science and Technology,2010,32(10):91~95

Computational fluid dynamics (CFD) is one of the computer-based solution methods which are more widely employed in aerospace engineering.
With the help of MATLAB simulation we can solve the fluid flow around the airfoil subject to the defined aerodynamic and structural constraints within less computational time.
The best airfoil which gives maximum Coefficient of lift can be obtained by this simulation directly with less computational resources.
Selvakumar, “Optimum hierarchical Bezier parameterization of arbitrary curves and surfaces,” 11th Annual CFD Symposium, Indian Institute of Science, Bangalore, India, pp.46-48, August 2009

The influence of the flight aerodynamic for interactions of wings and body of the honeybee ZHAO Hong-yan1,a, ZHANG Peng-fei1,b, MA Yun1,c 1Beijing Institute of Technology, Beijing 100081,China a272159211@qq.com, bzhangpf0719@163.com, cmayun_1633@163.com Keywords:wing, aerodynamics, vortices, numerical simulation.
The aerodynamic and vortices were simulated by the CFD software of Fluent.The leading-edge vortex generatedin the translation phase, and delayed stall mechanism had an important effect on the high lift.

For the analysis of various extruder models are used not only testing, but also diverse simulation techniques.
I�TRODUCTIO� Not only testing but also diverse simulation techniques are recently used to analyze various extrusion models.
(a) Standard Plate modelling data value (b) �umber 1 Plate (c) �umber 2 Plate (d) �umber 3 Plate (e) �umber 4 Plate (f) �umber 5 Plate (g) �umber 6 Plate Fig. 6 Rate of Plates Fig. 7 shows plate simulation values in graphs.
[3] Dong-Seong Kwag, Woo-Seung Kim and Min-Young Lyu, 2001, "Three-Dimensional Heat and Fluid Flow Simulations for Non-Newtonian Fluid in a Single Screw Extruder", KSME, pp. 337~342
"Cfdesign Technical reference : Upfront CFD"

aChenyong880@yahoo.com.cn, bliangxt666@126.com.cn, cZeng-jhua@263.net.cn, d13882393081@163.com.cn,eliangxt666@163.com.cn Keywords: converter steelmaking, oxygen lance, oxygen jet, numerical simulation, metallurgical effect Abstract: The lance system is one of the important link of converter.
The numerical simulation for a three-dimensional oxygen lance nozzle was carried out according to the fundamental parameters of PZH steel, the characteristics of the oxygen jet were analyzed and discussed.
Numerical simulation of oxygen lance To accurately detect each parameter and actual performance, the design lance was simulated by CFD in this paper.
Conclusions (1) The numerical simulation for a three-dimensional oxygen lance nozzle was carried out according to the fundamental parameters of PZH steel.
[2] WANG Wen-jing, ZHAO Hong-xin,PAN Yi-fang,etc,in:Numerical Simulation on Flow Behavior of Nozzle Jets in Oxygen Lance.