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Thangaraju3,c 1.2.3College of Engineering, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43009, Kajang, Malaysia akannan@uniten.edu.my, bramies@uniten.edu.my, csavithry@uniten.edu.my Keywords: axial fan, CFD Abstract.
To investigate the flow structure and to analyze qualitatively commercial CFD package, FLUENT is exploited.
The research of using CFD in designing axial fan guide vane would be cost effective.
(8) (9) Numerical Modeling Proprietary CFD software is used to create a 3-D model of 1250mm axial fan.
The design was initially made in the CAD software then was exported to ANSYS GAMBIT, the pre-processing software of the ANSYS FLUENT commercial CFD package.

Numerical simulation such as fluid dynamics and structural analyses is preferred to resolve nuclear safety issues instead of expensive and complicated experiments.
Combined CFD & Structural Analysis Overview.
CFD Analysis.
In order to minimize the disturbances in the flow, a sufficient area was considered before and after the CFD model.
The distributions of internal pressure obtained from CFD analyses are applied to the input conditions of following structural analyses.

Steady cavity flow of 2-D hydrofoil is simulated by CFD software.
The impacts of different cavitation models, turbulence models and wall functions to the numerical simulation results are analyzed.
Simulation results were compared with experimental data under different cavitation number.
Summary and conclusions Factors which influence the accuracy of simulation results to cavitation flow were analyzed in this work.
The analysis of computation fluid dynamics—the based theory and application of CFD[M].

In this study, commercial software ESI-CFD® was adopted for the simulation.
Results and Discussions Simulations of Static Pull-in.
The static and transient pull-in processes analyses were performed by using the ESI-CFD ®.
[9] CFD Research Corporation: CFD-ACE Theory Manual Ver.4.0 (Huntsville, AL 1998)
Beskok, Microflows and Nanoflows: Fundamentals and Simulation, New York: Springer-Verlag (2005).

Good agreements were found between simulation and measurement.
In recent years, with the increasing of computing power and memory capacity of a computer, computational fluid dynamics (CFD) has developed into an important and useful tool for studying fluid problems [3, 4].
FLUENT is industry-leading CFD software for fluid simulation, and has been used widely in both industrial and academic applications [5, 6, 7].
A boundary condition named fan boundary was chosen as the only source of simulation.
However, the tendency of simulation and experiment at every line is very close.

The numerical simulation of construction is to obtain the desired accuracy.
Introduction At present the numerical wind tunnel simulation in our country has started.
CFD Numerical Simulation Control Equation.
In this paper, the numerical simulation selected Realizable κ-ε model.
[4] Wang, F.J., Computational fluid dynamics analysis of CFD software theory and application [M].

Methodology Computational fluids dynamics or CFD is the analysis of systems involved in various phenomena such as fluid flow around the object and heat transfer by means of computer-based simulation.
List of the CFD software are huge and it consists of paid version and open source package which is free but with some limitation.
Pre-processing: This is the first step of CFD simulation process is describing the geometry of the object and the environment domain and mesh.
Solver: Once the problem physics has been identified, fluid material properties, flow physics model, and boundary conditions are set to solve using a CFD software.
Results and Discussion Below are the results from the CFD simulations.

Indoor thermal environment, along with human response, was studied by means of CFD.
In this work, the performance of a radiant floor heating system was analyzing using CFD method of convection and radiation.
Simulation Model Physical Model.
The office space used in the CFD is 6.4m in length, 5m in width and 3m in height.
In order to well analyze the temperature field, the indoor thermal environment of the office room is simulated by CFD.

The simulation results have a good agreement with the experiment.
The values of these parameters will be used to set up the validated CFD model.
In this study, the time step (0.1s) of CFD solution is time interval Δti.
Eisenberg, Vulnerability Model: A Simulation System for Assessing Damage Resulting from Marine Spills.
Guo-ming, Quantitative risk analysis of toxic gas release caused poisoning-A CFD and dose-respoonse model combined approach.

LES is a turbulent numerical simulation method that is different from the direct numerical simulation (DNS) and Reynolds average method (RANS).
The large size vortex is solved by direct numerical simulation.
Fig.2 The computational field In order to decrease the number of grid simulation calculation and save time, the half model simulation method is applied.
Hexahedral grid has a relatively rapid convergence rate and tetrahedron grid has very good adaptability that can meet the requirements of CFD. 3.
Simulation Method 3.1 Set up monitoring point.