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Under the requirements, using CFD method simulated four kinds of structure cyclone flow field of the marine gas turbine intake filters, found the lowest flow resistance structure, then verified by experiment.
Through comparison, the numerical simulation results agree with experimental study well.
In this paper, three different structural form cyclones are studied under the same conditions using CFD method.
Numerical simulation is conducted and then verified by experiment.
Table 3 The resistance loss of cyclone separator Type Simulation result [Pa] Experimental result[Pa] 54mm-conical solid-direct export 54mm-conical solid-semi-slant export 935 880 930 873 Conclusion In this paper, using CFD method simulated four kinds of structure cyclone flow field of the marine gas turbine intake filters, found the lowest flow resistance structure and verified by experiment.

Numerical Simulation of Flow Field within Mutational Section Pipe Jianhua Zhanga, Kun Hu and Yifan Xu Navy Submarine Academy, Qingdao 266042, China azjh_feiyu@yahoo.com.cn Keywords: section mutation; compressed gas; pipe; numerical simulation Abstract.
But the disadvantages can be overcome if CFD is used.
Through conducting the numerical simulation of interior flow fields of two different section change pipes by CFD software, this paper researches the influence of different mutational patterns of cross section on pipe flow of compressed gas and pressure drop rule reflected in the process that compressed gas is going through pipelines.
To seize the accurate details of the flow, encryption of gridding on cross areas is needed when we use CFD to analyze the flow field
Numerical simulation of the internal flow in lamilloy [A].

The effects of perforation plate structure on water flow in plant xylem vessels were studied using CFD (computational fluid dynamics) approach, the calculation results were used to estimate the effects of the perforation plate on conductance.
The simulations were carried out using the commercial code FLUENT V6.13, which is based on the Navier-Stokes equations.
Results The simulation results of example model were show in Fig.3.
Discussion The results of simulation showed that the structure of perforation plate had a substantial effect on the vessel’s water conductivity.
Predictions of a Turbulent Separated Flow Using Commercial CFD Codes.

Lastly, the computational fluid dynamics (CFD) simulation was conducted to study the turbulent gas-solid two-phase flow in the wheel cavity, which can be used for the optimized design for the wheel.
CFD modeling and Simulation Modeling.
Simulation results and analysis.
Yang, The numerical simulation on internal flow field in 6U-type centrifugal pump, Machinery, 35 (12) (2008) 24-26
Wang, Computational fluid dynamics analysis: Principle and application of CFD software, Tsinghua University Press, Beijing, PRC (2004).

HVAC＆Gas Institute, College of Mechanical Engineering, Tongji University , Shanghai 200092,China) a email：fuyunzhun@126.com,shxqd@126.com , bemail: duxinghui88@163.com, cemail: zhangxu-hvac@tongji.edu.cn Keywords: Ground source heat pump, Pile foundation heat exchanger, CFD, Temperature distribution Abstract.
CFD numerical simulation method was adopted to analyze temperature distribution characteristics of a single concrete pile and dense arrangement of concrete piles heat exchanger.
Numerical simulation and experiment study on the performance of pile foundation ground source heat exchanger were done by L.Laloui in 2006 [1] and [2] .
[5].Jun Zhao, Huajun Wang, Numerical simulation on heat transfer characteristics of soil around compact pile-buried underground heat exchangers, HVAC, 2006, Vol.36(2): 11-15
[8].Xu Zhang, Simulation study on ground-source heat pump performance characteristics in Expo Axis and underground syntheses project, refrigeration technology, 2010supplyment: 13-17.

Numerical and experimental analysis on indoor thermal environment in commercial kitchen Dahua Jiang1,2,a Zhihua Wang3,b Faen Shi1,c Rushan Ren1,d 1 Jiangxi University of Science and Technology,Ganzhou,341000,China 2 Xi’an University of Architecture and Technology,Xi’an,710055,China 3 Xi'an Jiaotong University,Xi’an,710049,China adahua7723@163.com, bwzhhgd3210@163.com, cshifaen@163.com, drenrushan@163.com Keywords: CFD; Kitchen ventilation; Up-suction hood ; IAQ Abstract.
This study aims investigate and analysis the indoor air quality of kitchen with using CFD numerical analysis method via the velocity, temperature, humidity CO2 concentration .It is concluded that The temperature distribution are large difference in the kitchen and the maximum value is up to 324K on the work area which near the cooking ,and the CO2 concentration which is close to the stove is 1420ppm,1370ppm, 1470ppm respectively, and it is more than the acceptance criteria (CO2<1000ppm) 42%,37% and 47% respectively.
The aim of this paper is to investigate the indoor air quality in commercial kitchen using CFD code and field test in order to probe the factor of IAQ under the condition of natural and mechanical exhaust.
Experimental results.To prove the validity of the simulation results, an experiment was conducted.
Journal of Hebei Institute of Architectural Science and Technology,2005,22(3):24-26 (in chinese) [4] Wan Xiongfeng,Yu Likui and Hou Huabo.The Improvable Strategies of the Influence of Kitchen Fumes to IAQ[J].Building Energy&Environment,2005,24(3):27-31(in chinese) [5] Dahua Jiang, Angui Li, Faen Shi.Numerical Simulation of IAQ under Up-suction Exhaust Hood in Commercial Kitchen[J].

Therefore the research on the CFD fire extinguishing simulation is rapidly developing these years.
Only implementing several effective tests associating with CFD simulation, both the cost of the test and the pollution will be highly reduced.
The employed computer simulation software is FDS.
Utilize the computer numerical simulation software to implement the fire extinguishing simulation with the different foam flow rate - 0.5L/min，0.8 L/min，1 L/min，1.5 L/min，2 L/min, etc. respectively.
Reduced-Scale Experiments on the Water Suppression of a Rack-Storage Commodity Fire for Calibration of a CFD Fire Model.

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.

The unsteady three dimensional flow simulation around sphere using numerical simulation computational fluid dynamic for moderate Reynolds Number between 20 ≤ Re ≤ 500 is presented.
Therefore, the objective of this paper is to investigate the flow phenomenon around sphere using a CFD in a moderate Reynolds number from 20 to 500.
Less mesh cells reduce CPU time during CFD simulation which permits a significant number of cases to be run.
The transient simulation was set and SIMPLE was chosen for the pressure correction method.
Clarke, Simulation of Flow Past a Sphere Using the Fluent Code, Maritime Platform Division DSTO, 2008

This unsteady flow feature was investigated by the large eddy simulation (LES) method with the sliding mesh technology.
This unsteady flow feature was investigated by large eddy simulation (LES) method with sliding mesh technology [7].
The error is less than 3%, so the results of numerical simulation are credible.
The output from the CFD analyses provided a time history of the pressure variation as the impeller rotated in the volute.
Numerical simulations identify that the staggered arrangement impeller can reduce the levels of pressure pulsation significantly.