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Numerical simulation results indicate that using RANS equations can better forecast hydrodynamic performance of catamaran planing vessel at high speed, which provides a practicable numerical method for optimization design of the catamaran planing vessel’s hull.
Introduction Numerical simulation is becoming a common way for assessment of ship performance in the early design stages,especially in the case of high—speed vessels .Restrictions in simulation and data probing, expenses and scale effects of experimental analysis are good reasons to employ a numerical tool as a part of ship design procedure.In 2003 Azcueta etc [1] numerically simulate a high speed planing vessel (Fn = 4).
In this paper, a numerical prediction method of resistance performance of catamaran planing vessels is discussed based on the CFD technology.
Steady and Unsteady RANSE Simulations For Planing Rafts.2003
Practical CFD Simulations for Planing Hulls .2007

In this paper, computational fluid dynamics (CFD) numerical simulation theory and methodology were applied.
The flow field characteristics of the seal cavity vapor-liquid two-phases flow were numerical calculated by using CFD mix-multiphase flow model.
CFD Basic Theory Fluid flow is dominated by the law of physical conservation, the basic conservation equation consist of the mass conservation law, the momentum conservation law and the energy conservation law.
CFD Numerical Modeling CFD Pre-processing.
The thermal oil pump bellows mechanical seal is used as the researching object, and the schematic diagram of the bellows mechanical seal shown in Fig.1.The three-dimensional geometric model of the seal cavity flow field was built by the CFD pre-processing software GAMBIT.

Numerical Simulation and Analysis of Low Hysteresis Brush Seals Jiadong Chi1, a, Zhili Wang1,a and Like Li1,a 1School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China ajarod_chi@163.com Keywords: brush seal; CFD; aerodynamic force; contact force; bristle deflection; size parameter Abstract.
Lelli and Chew [8.9] combined the CFD model with a mechanical model and obtained bristle deflections in the axial-radial plane.
In this paper,used the anisotropic porous medium model, computed by CFD soft FLUENT,the velocity field and the real aerodynamic loads on each node of the bristles are available.
CFD Model The bristles are regarded as porous medium.
Huang: Low Hysteresis brush seal numerical simulations, Journal of Beijing University of Aeronautics and Astronautics, 34(9), (2008), pp. 1080-1083

The flow characteristics in mini/micro sonic nozzles have been studied in this paper using the computational fluid dynamics (CFD) method.
Using the CFD method to simulation the flow field parameters and flow rate in nozzles.
Simulation and Discussion Nozzle Geometries and Computational Method.
Simulation model of nozzles(3-D) Numerical simulation used k-e turbulence model in software fluent 6.1.
Conclusions Nine group simulation experiments have been studied in this paper using the computational fluid dynamics(CFD)method.

University of Feres Yahia, Medea, Algeria aboualemlaribi@yahoo.com, bdjelloulbelkacem@gmail.com, clmp2m_cum@yahoo.fr Keywords: Turbulence, CFD, Navier-Stokes, k-ε, k-w, RSM, Jet.
The software used was CFD code Fluent with his three turbulence models namely k-e, k-w and RSM.
The better numerical results were obtained by CFD code CFX, where results are in good agreement with the experimental results.
From the numerical view point, three methods of approach are commonly used: Direct Numerical Simulation (DNS), Large Eddy Simulation (LES) and Reynolds Average Navier-Stokes equations (RANS).
Abbas : Simulation of Turbulent Jet Free by the RSM LRR-IP Model. 12th International days of Thermal.

With the development of numerical simulation methods, computational fluid dynamic (CFD) modeling is widely used by many authors to study fully the natural ventilation process.
Asfour and Gadi [4] demonstrated the CFD is useful to predict the natural ventilation in buildings.
Gan [5] investigated the buoyancy-driven natural ventilation of buildings by CFD methods.
In this paper, the authors numerically investigated the natural ventilation in a workshop with heat sources based on CFD method.
Sketch of workshop Numerical model and simulation method.

A 3D CFD model of a horizontal axis wind turbine was simulated using FLUENT to predict the performances.
In summary, with the development of computer technology, the methods on aerodynamic performance forecast and load calculation of wind turbines have changed from traditional theoretical methods such as Blade Element Theory and Momentum Theory into CFD numerical simulation method.
Numerical Simulation Methods.
In recent years, with the continuous development of computer technology, CFD numerical simulation method has been widely used and gradually becoming mature.
[7] Song fangfang: Design and simulation analysis of small wind turbine blade.

In this paper the research object is the velocity and temperature change of the airflow inside the subway, and the research method is computer simulation.
Figure 4 Body structure of model 3 The CFD calculations of models CFD (Computational Fluid Dynamics) is a computer and image display that uses numerical calculation to finish the related work about the fluid flow and heat transfer system of physical phenomenon.
Computer Numerical Simulation of Fluid Mechanics is a study of fluid flow and other physical phenomenon of modern technologies.
Conclusion This paper has reached some conclusions about the subway air-conditioning system using CFD to simulate the airflow.
Climate simulation and test methods of urban transportation air-conditioning system [J].

The crystallization process of potassium chloride was simulated by CFD and MATLAB.
The fluid dynamics information of multi-phase flow are usually obtained by CFD simulation, so the fluid dynamics model are usually solved on the basis of finite volumes (CFD grids) [7].
The fluid dynamics information can be obtained by CFD simulation.
Simulation results The simulation is carried out in the multi-phase model to obtain the fluid dynamics information by CFX software.
The results of CFD simulation showing the distribution of the suspended crystal volume fraction are based on certain average crystal volume faction of the crystallizer.

Computational fluid dynamics (CFD) is presented as an important tool in solving problems involving the dispersion of chemicals into the atmosphere.
This study was conducted by means of numerical simulations using the commercial package ANSYS CFX®.
Geometry and mesh For the generation of the structured mesh, or computational domain, representing the physical domain of study, the ICEM-CFD software was used.
Figure 3: Mesh used in the simulations, highlighting the input area and the chimney.
The structured mesh was made using the ICEM CFD software, which consists of 228,000 control volumes.