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On the contrary, it is convenient to accurately calculate and simulate the flow field under complex geographical and operational conditions using computational fluid dynamics (CFD) method; thus, CFD is an important and useful tool for investigating this kind of water environment problem.
Numerical Simulation Methods Model of calculated region.
The water body was simplified as a two-dimensional axisymmetrical simulation model of flow domain, and the right half of the simulation model was taken into consideration.
The temperature of water-inlet of simulated region defined by an UDF is the average value of temperature of water-outlet of simulation region at the previous simulation time.
Axis was set at the left boundary of the simulation region.

Distribution rule analysis and research of wind loads of stadium by numerical simulation Zhixiang Yin1,a, Shuang Zhang1,b College of Architectural Engineering, Liaoning Technical University,Fuxin,Liaoning,123000, China azhixiang_yin@sohu.com, bzs8799@sina.com Keywords: long-span roof; wind load distribution; numerical simulation Abstract.
Numerical simulation method is a new method which is developed with the development of computer technology.
Therefore, in the engineering numerical simulation of wind load often use the SST k- ω model to simulation turbulent flow.
Practical engineering application Based on FLUENT finite element software platform, a gymnasium as an example, using CFD numerical simulation method carry on the research of the roof structure surface wind pressure distribution characteristics.
Numerical simulation of flows around long-span flat roof [J].

WFDS can simulate fires in two or fully three-dimensional simulations, with no symmetry assumptions which three dimensional simulations require significantly more computational resources.
Conventional LES quantities are implicitly filtered in the simulation.
All thin vegetation in CFD code consumed by the fire.
A CFD code used to simulate vegetative combustion in the Wildland and WUI fire.
Numerical simulation and experiments of burning douglas fir trees.

However, they are accompanied by characteristic advantages and disadvantages, which limit their possibilities of application. 3D Computational Fluid Dynamics (CFD.
Within CFD, geometrical and physical conditions are modeled as realistic as possible and boundary conditionas are defined.
Beneficial of the CFD approach is its high accuracy and the ability to realistically model the systems.
Herrán-González et al., Modeling and simulation of a gas distribution pipeline network, in: Applied Mathematical Modelling, volume 33, no. 3, (2009), pp. 1584 -1600
Bermúdez et al., Simulation and Optimization Models of Steady-state Gas Transmission Networks, in: Energy Procedia, volume 64, (2015), pp. 130 -139

Numerical Simulation of Multiphase Flow Pollutants during Migration Process in Buried Oil Pipeline Leakage Han bing Qi 1, a, Yang Liu 1,b , Guo zhong Wu 1,c, Dong Li1,dand Jie Liu 1,e 1 The College of Architecture and Civil Engineering, Northeast Petroleum University Fazhan Lu Street, Daqing 163318, China.
Considered influence of buried pipeline leakage of crude oil pollutants multiphase flow migration phenomenon effects, numerical model was established to buried pipeline road multiphase leak process simplified for two-dimension problem, numerical simulation was used with the CFD software FLUENT on buried pipeline leakage of crude oil pollutants migration process caused pollution problem, calculation simulation was carried out in the two species workers condition of one phase flow and multiphase flow buried pipeline leakage of pollutants around earth temperature field, the speed field and the distributions of oil/water phase in the soil porous media.
Buried oil pipeline leak pollutants model figure Numerical simulation of regional dimensions 20m×10m, L0=10m, H0=10m, diameter for buried oil pipeline is D0=600mm, pipeline depth S0 =1m, width of E point is 10mm.
(in chinese) [5] Wu，G.Z., Xing，CH, Qi，H.B, Li，D. (2011).Numerical simulation of temperature field of oil pipeline leaks surface [J].
(in chinese) [6] Wang，H.T., Roman，S. (2000) Oil study on numerical simulation of contaminant transport in soil [J].

The current research of grate-kiln pellet production performance mainly uses computational fluid dynamics (CFD) method to obtain temperature distribution and velocity distribution through simulation analysis of thermal processes [4-6].
Other simulation parameters and theoretical assumptions are the same
(2)Fluent simulation The geometric model, shown in Fig.2 (a), is established by using Pro/E.
(3)Analysis of simulation results The differences between theoretical calculation and simulation results in the temperature of outlet gas from BH3BH2BH1 are about 8℃, 4℃, 7℃respectively.
It is proved that the simulation model and process are correct and the designed unit is feasible and effective.

Specially, a vortex flow field in the pipe experiencing particle abrasion was formed and particle flow simulation was conducted.
Boersma and Nieuwstadt [4] computed a fully developed turbulent flow in a curved pipe using Large Eddy Simulation (LES).
Riffat and Gan [5] predicted the pressure loss coefficients for rectangular and flat-oval elbows using commercial CFD code FLUENT.
We analyzed the flow characteristics in a 90° elbow, and also conducted particle flow simulation.
Finally, commercially available CFD software, STAR-CD was used.

The commercial computational fluid dynamics (CFD) code, ANSYS-CFX 11.0 [12] is used for the flow analysis.
And, CATIA and ICEM-CFD are employed to design the groove and to generate the mesh, respectively.
The air is considered as an ideal gas and the average static pressure is set at the outlet boundary condition for steady-state simulation.
Also, the near-stall point of the experimental data is 0.925, which is the mass flow normalized by the chocking mass flow, while the near-stall point predicted by the numerical simulation is 0.909.
Validation of CFD results with experimental data.

The Computational Fluid Dynamics (CFD) method, which is widely used by many researchers [2,3], has been proved to be an effective approach to reveal the sloshing motion, especially in case of low-gravity and zero-gravity liquid sloshing.
However, due to the high complexity of spacecraft systems and the limitations of the onboard computers on the CPU speeds and memory sizes, the CFD simulations are not available.
Baeten[13-15] adopted a three-dimensional time accurate particle-cluster method to prediction the spacecraft fuel sloshing in experimental satellite, the simulation results showed that sloshing effects and impact forces was close to those obtained from the experimental satellite.
Sudermann, “Using CFD techniques to predict slosh force frequency and damping rate,” 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, May 2009, Palm Springs, California

Basisning on two-phase flow theory and using the FLUENT fluid analysis software to do numerical simulation in High pressure abrasive water jet.
(2) The simulation results shows that: Increasing the density of the fluid has obvious improvement effect on the velocity and cutting forces.
Computational fluid dynamics: The principle and application of CFD software [M].
Structural parameters of jet nozzle affect jet flow field simulation and research [J].Coal mine machinery,2012, 63（03）:1003-0794
Simulation and Analysis for Abrasive Water Jet Cutting Process Parameters[J].