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The simulation results show good agreement with the experimental data.
CFD (Computational Fluid Dynamics) methods have been used for simulating vessel maneuverability since the beginning of the 1990s [2].
So far, many people have studied the flow field around the underwater vehicles using CFD method [3-6].
The FLUENT is used for the simulation of full appended SUBOFF model.
Fig. 5 Comparison of axial force coefficient X on the generic bare hull Fig. 6 Comparison normal force coefficient Z′ on the generic bare hull In this part, a 2D in house code-CADMV and commercial CFD code FLUENT are introduced for simulation of the flow field and hydrodynamics for SUBOFF model.

Viscous Dissipation Effects on the Coating Resin Flow Characteristics in High-Speed Optical Fiber Coating Process Kyoungjin Kim1,a* 1Department of Mechanical System Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk 730-701, Republic of Korea akimkj@kumoh.ac.kr Keywords: Optical fiber, fiber coating, capillary coating die, viscous heating, CFD.
Thus, temperature dependence of coating resin viscosity needs to be included in the flow simulations.
A multi-propose CFD software, COMSOL Multiphysics 4.3, has been employed in solving the governing equations for continuity, momentum, and energy conservation for the flow and temperature fields of coating resin which is subjected to high speed fiber drawing and viscous heating.
All the simulations used the structured computational mesh and the total number of quadrilateral cells is approximately 8,000.
Jaluria, Simulation of the flow in a coating applicator for optical fiber manufacture, Comput.

The first part of the article briefly presents the results of the air flow computer simulations.
Due to lack of the proper wind tunnel at the home university, it was decided to use the computational fluid dynamics (CFD) technique.
Boundary conditions for the air flow simulations – sloped torus Fig. 2.
Similar graphs, obtained from experiments in wind tunnel or numerical simulations, can be found in [2,3,4].
The comparison of the wind force obtained from Eq. 27 and the previously described air flow simulations shows, that as far as the straight cylinder is concerned, differences between the results of the analytical and numerical method very rarely exceed 10%, where the CFD method gives smaller values.

The method in this paper the efficiency and reusability of the flow simulation algorithm be significantly improved.
We put forward a specific example to demonstrate the application of this method to groundwater simulation.
Here, we show the topology-based, including groundwater flow visualization numerical simulation validation of 2000 (a) (figure 3) and groundwater numerical simulation forecast of 2008 years (figure 3 (b).
Instances of groundwater simulation for Beijing, China Conclusion The common development of the extracting rules is important flow phenomena, improve computer simulation efficiency and reduce repeated work.
Tan, “Streamline Construction and Application in CFD Based on Velocity Decomposition Model of Fluid Flow,” Journal of computer-aided design & computer graphics, 2002,14(11),1005-1009.

The CFD (Computational Fluid Dynamics) software STAR-CD is used in the simulation.
As the development of the operating speed of computers and engines, multi-dimension CFD simulation codes are becoming an ever key tool in the research and development of engines.
The engine speed is fixed at 1500rpm/min in simulation.
This model could be used in simulation.
The simulation results can be summarized as follows: 1.

The optimization of the entrained flow gasifier is the critical thing for the development of entrained flow gasification technology.This paper presented a three-dimensional computational fluid dynamic(CFD) simulation for a better understanding of the cold condition flow characteristic in an entrained flow gasifier.
It is very necessary for investigating the flow in the entrained flow gasifier and a series of simulation were completed to study the influence of various spraying angles, diameter and outlet velocity of nozzle on the gasifier flow and mixing condition.
Tab.1 The operation variable during the simulation operation variable unit value θ-the spraying angle of nozzle [°] 4.5 13.5 22.5 d-the diameter of nozzle [m] 0.12 0.2 a 0.3a v-the injection velocity of nozzle [m/s] 50 75 100b a: only in the condition that θ=4.5°.
Fig. 5 a) Time scale of integral vortex b) Length dimension of integral vortex (d=0.12 m v=75 m/s z=1.7 θ=4.5° 13.5° 22.5°) Conclusion A computational fluid dynamics simulation of the cold condition characteristic in an entrained flow gasifier was presented.

The results of numerical simulation and experimental data are used for their comparative analysis and the assessment of the phenomena.
The work presents numerical simulations of the shock wave effects and the results are supported by experiments.
The following step was the numerical simulation using explicit dynamics of the shock wave effects on a similar metallic plate.
ICEM-CFD blocks and one quarter of the 3D bomb body mesh The preprocessed bomb body was imported in AUTODYN resulting a number of 675662 elements for the bomb body and 188998 elements for the stabilizer.
The average velocity of the bomb body obtained experimentally is simmilar to that obtained using simulation, being around 1200 m/s.

Numerical Simulation Method.
Contrast the simulation result, there was not much change on flow characteristic.
Unsteady Numerical Simulation Using CFD to numerical simulation for the pump can predict its performances distribution rules of internal flow effectively, and effective reference [4.5] for optimization is thus provided.
Numerical simulation of rotational interior flow in self-priming pump[J].
CFD Modeling of the Flow Field inside a Reflow Oven [J].Soldering and Surface Mount Technology, 2002, 14 (1): 38-44

Several modifications on computational fluid dynamics (CFD) have been made to increase the number of unknown variables.
The rate of recovery of oil and the displacement of oil with displacing fluid are the core issues for the evaluation and simulation of oil reservoirs [22].
Table 1 shows the input parameters and boundary conditions for the simulation of the displacement of oil with brine.
A numerical pore scale simulation was carried out which was limited to two-dimensional flow for reservoir and oil system for recovery process.
Saidi, "Simulation of naturally fractured reservoirs," in SPE Reservoir Simulation Symposium, 1983: Society of Petroleum Engineers

Numerical Simulation of triangle-arranged tubular heat exchanger Hui Li1,a, Ruihua Hu1,b 1Huang He Science and Technology College, Zhengzhou, Henan, 450063, China a feng_109_1@163.com, b 1587857110@qq.com Keywords: Fluent, numerical simulation, effect of heat transfer.
Based on the principle and method of computational fluid dynamics (CFD), using the software, FLUENT, the inner water flow field in the cross-section geometric model of a triangle-arranged tubular heat exchanger was simulated and the flow details were studied roundly.
Fig.1 The mesh division of geometric model Simulation Results The figure of convergence curve.
Fig.4 The figure of pressure distribution The Improved simulation results.In order to make the distribution of the cold fluid within the heat exchanger more uniform and to improve the heat transfer effect of the fluid, a small improvement of the structure of the heat exchanger is shown in Figure 5.
Therefore, compared with the experimental study, the method of numerical simulation saves the time and costs and provides a foundation and reference for structural design optimization of the heat exchanger.