Search results

For that purpose, a 10450-DWT tanker is considered in a study using computational fluid dynamics (CFD).
The averaged time required for running a model simulation is approximately two and a half hours.
Wang, Numerical simulation of viscous wake field and resistance prediction around slow-full ships considering free surface.
Kraskowski, CFD optimization of vortex generators forming the wake flow of large ships, In: Proc. 13th Numerical Towing Tank Symposium, Duisburg, Germany (2010)
Turnock, Free-surface CFD prediction of components of ship resistance for KCS, In: Proc. 13th Numerical Towing Tank Symposium, Duisburg, Germany (2010)

Keywords: Helical inlet port, Port deviation, CFD, Flow characteristic Abstract.
Based on the validation of CFD precision by test, the numerical simulation of flow characteristics in ports-valve-cylinder system is carried out.
This paper investigated the influence of inlet port, structure parameters and their deviation on the performance of the port by use of CFD.
The mass flow test results agree well with that of simulation in all valve lift.
Output Contrasts between Simulation and Test Table 1 Contrast of Port Performance Parameter between Test and Simulation Stable flow test Numerical simulation Error Mean swirl ratio 2. 04787 2. 11228 3. 14% Mean flow coefficient 0. 29357 0. 29133 0. 76% Different Versions of Manufacturing Deviation Axial Deviation of Inlet Port The phenomena of axial deviation of inlet port is mainly caused by the sand core floating during casting.

The basic idea is to implement these geometries in computational fluid dynamics (CFD) and finally proceed to an evaluation and comparison of the simulation results, in order to select the best candidates for optimization and realization.
Since the simulation of phase transitions of CO2 requires complex calculation models and this complexity is not necessary for an initial analysis of different nozzle geometries, this article simulates using CFDs, which have already proven themselves in earlier simulations.
Fig. 1: Agglomeration Mechanisms [7] Geometries The geometries used for the CFD simulations all have identical general dimensions.
Fig. 2: Tested Geometries Simulation The CFD simulation consists of a string of operations which are undertaken in several different programs.
The reason for this is the absent solidification model in the CFD program.

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].

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.

., Taipei, 10608, Taiwan ahuangch@ntut.edu.tw, bwky1010@yahoo.com.tw Keywords: urban ecology, wind field, micro climate, aerosol, CFD, green building Abstract.
Method The measured data were used as the basis for the simulation analysis in this study.
The data were analyzed in the CFD simulation.
Numerical calculation was combined with CFD software, along with k-ε turbulence model analysis and finite-volume method, to solve the dynamic equations and energy formula.
Chen, Natural ventilation in buildings: measurement in a wind tunnel and numerical simulation with large-eddy simulation, Journal of Wind Engineering and Industrial Aerodynamics, vol. 91, 2003, pp.331–353 [4] A.P.

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.

The For numerical simulation, commercially available computational fluid dynamic (CFD) softwares GAMBIT and FLUENT are used.
Computational fluid dynamics (CFD), as a promising technique in wind engineering research, has attracted growing interest in the past two decades.
Compared with the conventional experimental approaches, CFD could provide more details about flow field without any need for employing complicated control and measurement systems.
Rolland et al. [6] developed a CFD based computational model to analyse the aerodynamic performance of their novel designed vertical axis wind turbine (VAWT).
For numerical investigation, CFD software GAMBIT is used for meshing the geometry and specifying the boundary conditions, whereas ANSYS FLUENT 14.5 software is used to solve the Navier-Stokes equations.

Compared simulation result with experiment result, the suitable CFD model to simulate interaction of water mist with turbulent gas jet flame was tested and selected.
CFD Simulation Simulation of gas jet flame The gas jet flame was created by the combustion of methane, injected through a nozzle in a open quiescent environment.
Results and discussion of CFD simulation Based on the experimental parameter, the interaction between water mist and gas jet flame was simulated by the CFD simulation.
Compared with the experiment result, the typical phenomenon including the extinguishment and liftoff of flame were obtained by the CFD simulation.
The process of CFD simulation shows good agreement with experimental result.