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When the air distribution is modelled in the ventilated space usually CFD simulation is performed and simplified boundary conditions are defined at the locations where the supply air enters the room.
Therefore the investigations were conducted with 3D CFD.
In both cases transient simulation was performed.
CFD has many deficiencies and uncertainties [10].
CFD, 2000

Introduction The flow past a marine propeller is one of the challenging problems in Computational Fluid Dynamics (CFD).
The simulation is carried out in the commercial software STARCCM+.
Bong-Jun Chang [2] employed a finite volume CFD method in conjunction with the standard k-ε turbulence model (Launder & Spalding, 1974) for an unstructured mesh.
Fig. 4 Grid independence test for Kt and Kq Steady analysis The CFD simulation is carried out for steady case with various turbulence models as shown in Table 1.
“Application of CFD to P4119 Propeller”, 22nd ITTC Propeller RANS/Panel Method Workshop, France, 1998

Study of Microminiature Autonomous Underwater Vehicle Hull Form Based on CFD Technique Hailong Shen1, a, Mo Du2, b and Yumin Su3, c 1,2,3 National Key Laboratory of Science and Technology on Autonomous Underwater Vehicle, Harbin Engineering University, Harbin 150001, China ashenhailong@hrbeu.edu.cn, bdumosuper@163.com, csuyumin@hrbeu.edu.cn Key words: CFD; AUV; turbulence model; mesh; resistance coefficient Abstract: Based on CFD technique, this paper discusses the applicability of different turbulence models and mesh partition method which are used to predict the hydrodynamic performance of AUV.
Application CFD to compare submarine hull forms [J].
Proceedings of the 2007 IEEE Intelligent Vehicles Symposium Istanbul, Turkey, June 13-15, 2007:938-943 [6] SHEN Hai-long,SU Yu-min, Mesh partition methods for numerical simulation of the flow fields of full form ships[J].Journal of Harbin Engineering University,Vol.29 No.11,Nov.2008:1190-1198 [7] ZHANG Nan, Nan, SHEN Hong-cui, YAO Hui-zhi.
Validation of numerical simulation on resistance and flow field of submarine and numerical optimization of submarine hull form[J].Journal of Ship Mechanic, Vol.9, No.1, Feb., 2005:1-13 [8] PAN Zi-ying et al.
Research of CFD application in engineering estimation of submarine maneuverability hydrodynamic forces [J].

Quantitatively, the differences between experiment and CFD with respect to the velocity profile are acceptable.
Before presenting any result, a preliminary experimental test is compared to a CFD code (MaPFlow).
A brief introduction to MaPflow Eulerian CFD is by far the most popular simulation method in aerodynamics.
This is because the CFD and experimental data have similar velocity profile in the wake.
However, if we compare the deficit area only, the differences are not negligible (around 20%) The reason is that even though we have taken measures (honeycombs and screens) to reduce the flow turbulence for the wind tunnel experiment, essentially the flow are still not uniform while in the CFD simulation, the flow can be set to be uniform.

Theflow fields in different monsoon periodsof Shanghai Mengqing Garden were analyzed by computational fluid dynamic (CFD) simulation method.
At the same time, the wind energyvalue in the Shanghai Mengqing Garden wasalso evaluated by CFD method.
All the buildings are kept in the simulation model.
Domain Size.The domain size should be extended on the basis of the building region in the CFD analysis.
Turbulence Model.The turbulence model type is very important for the simulation accuracy of building environmental flow in CFD analysis, because the complex flow phenomena, such as separation, reattachment and vortex shedding, happen in building environmental flow [6].

Flow Filed Simulation Analysis and Structural Optimization of Automotive Catalytic Converter Tianzhong Sui 1, a, Lei Wang 1,b and Yang Wang 1,c 1School of Mechanical Engineering & Automation, Northeastern University, Shenyang, China a tzhsui@mail.neu.edu.cn, b leiwang@mail.neu.edu.cn, csuitz@163.com Keywords: Catalytic converter, Flow uniformity, CFD, Numerical simulation Abstract.
Based on Hydromechanics, the relational mathematical models of catalytic converter simulation are established and the parameters are calculated.
Making use of CFD numerical simulation method, a simulation is set up for the internal flow field of catalytic converter original model using fluent software.
From the simulation, the internal flow characteristic is understood.
Such as Lai et al applied PHOENICS software to establish a 3D model without chemical reaction and adiabatic and 3D numerical simulation of steady state flow was made to catalytic converter [3].

E-mail: sunshir@163.com zhoujinmin@163.com Keywords: high temperature heat pipe heat exchanger (high temperature-HPHE), heat transfer enhancement, CFD, temperature distribution, vapor temperature.
Comparison and Analysis of Numerical Results With Experiment results Comparison Analysis of Cold And Hot Flow Temperature Field Fig.3 shows that the hot flow and cold flow outlet temperature obtained by CFD numerical simulation calculation with known inlet temperature conditions for hot flow and cold flow.
The analysis results indicate that CFD heat analysis computation software can predict the temperature distributions of a HPHE in a reasonable and accurate manner.
So the numerical results satisfy the actual engineering requirement, thus further providing the reliability of CFD software’s credibility.
At first, a numerical calculation modeling was established on the basis of the heat transfer characteristics of HPHE, and the novel CFD calculation software was used to perform simulation calculation on physical HPHE, the calculation results well agreed with experiment results, further providing the reliability of this simulation software, on this basis, simulation study was perform with this software on local heat transfer for ordinary-HPHE, enhanced-HPHE 1 and 2, and the simulation results have well predicted the optimum structure of enhanced heat transfer elements, thus providing a reliable basis for widening the temperature application range for HPHE and for safe linking HPHE in different temperature zones.

The distribution performance of original style was studied with CFD numerical simulation method and an improved distributor was proposed in this paper.
Structure schematic diagram of two distributors Numerical procedure A commercial CFD code Ansys14.5 provided by Asia-Pacific was used to calculate.
The unstructured tetrahedral grids were generated by the ICEM CFD and the boundary layer near the wall was set.
When residual value was less than1.0×10-5, the simulation was converged.
Numerical simulation of distributor in a hydrotreating reactor.

CFD, as a powerful analysis technique develops very well.
The simulated results predicted by CFD model are consistent with experimental data.
CFD simulation model of milling cutters with different internal channels The present research selected three milling cutters with different interior channels, i.e., single direct hole, double direct holes and double helical holes.
Hence, cold air is used instead of Cryogenic oil mist in this CFD model.
So the velocity field of the CFD simulation model is available.

Simulation and Modeling of Compression Stroke in Diesel Engines Ph.D.
Student, Iulia Luminita Baboiu2 1Constanta Maritime University, Constanta, Romania 2Constanta Maritime University, Constanta, Romania 1mahrandawwa@gmail.com, 2Iuliab88@gmail.com Keywords: CFD, polynomial functions, compression stroke, Diesel engines.
The objective of this study is to simulate the compression stroke in diesel engines by using computational fluid dynamics (CFD), and to model the compression stroke by using thermodynamic equations for Ideal gases and polynomial function that fits thermodynamic data of JANAF tables.
The simulation part will be performed using ANSYS ICE software.
Simulation and modeling process will be carried out between the intake valve close (IVC) and top dead center (TDC), the results of simulation and modeling will be compared and discussed.