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CFD Simulation of Airflow Organization in the Ship Accommodation Kun Zhang 1, a, Haixu Li 2,b , Jinling Wang 1,c 1Harbin Engineering University, Harbin150001, China 2Systems Engineering Research Institute, Beijing100094, China a zhangkunzk00@163.com,b haixu2000@126.com ,cwangjinling07@163.com Keywords: indoor air quality (IAQ); numerical simulation; air conditioning; airflow organization; temperature fields; velocity fields; air age fields Abstract.
Currently, in the HVAV field, CFD is mainly applied in land air conditioning system while in the ship air conditioning system CFD study has not been universal.
And it tries to explore the main factors that impact accommodation airflow distribution and IAQ through CFD.
Numerical simulation about air-flow organization of the influence on the indoor air quality.
Research on numerical simulation of airflow organization of ship living cabin.

In this paper, based on CFD method and dynamic mesh technology, the ship maneuvering performance is predicted in viscous flow.
Introduction It is a challenging research project in ship hydrodynamic subjects that using CFD technology to predict the performance of a ship hull.
Recent ten years, with the development of marine CFD technology, numerical simulation precision of the ship maneuvering motions is increased constantly, which becomes more important in ship form optimum design, and is given the same status as model tests, moreover, it may be used instead of parts of model tests[1].
Results �umerical Simulation of Ship Maneuvering Hydrodynamic Derivatives.
W., Paterson, E.G., in: Verification and Validation of CFD Simulations, IIHR report no.407, Iowa Institute of Hydraulic Research, Iowa City. (1999) [6] Ming-Chung Fang: Journal of Ship Research, 49 (2) ,(2005), p69

Numerical simulation based on CFD for the movement field of the hydraulic poppet valve Xiong Shi1,a，Jun Chen2,b 1Department of Electrical & Information Engineering,Wuhan Polytechnic University,Wuhan, China 2Naval Architecture ＆Power Engineering College,Naval University of Engineering,Wuhan, China aE-mail:stonehero@163.net,bE-mail: chenjun758@sina.com Keywords:poppet valve; computational fluid dynamics; dynamic mesh; flow field; numerical simulation Abstract.
With the development of computer technology and computational fluid dynamics (CFD) theory, the simulation and the visual analysis for the internal flow field within the hydraulic poppet based on CFD were very hot in the area of hydraulic pressure recently [1-3].
To study the influence of spool movement on its internal flow field and realistically simulate its internal flow field, based on finite difference method, in this paper the CFD software Fluent dynamic mesh technology is used in the numerical simulation research of the internal flow field and the flow field change caused by the spool motion is analyzed.
Numerical simulation of the movement field of the hydraulic poppet valve has high authenticity and is important to other numerical simulation of movement field.
Quan, “CFD Simulation of Noise Characteristic of Coaxial Hydraulic Relief Valve with Three Stages,” Zhendong Ceshi Yu Zhenduan, 2009, 29(1), pp. 71-73

It is indicated that the CFD method can be applied to guide the optimization design of the cathode structure.
The software of computational fluid dynamics (CFD) method is applied to analyze the simulation of the numerical model and guide the optimal design of the cathode internal structure.
The simulation results are obtained as shown in Fig 8.
It is indicated that the CFD method can be applied to simulate the flow field, and the optimization design of the cathode can be guided according to the results of simulation.
Wang, Analyses of computational fluid dynamics-principle and application of CFD.

Definition of CFD Regions Table 1.
Dimensional Specifications for CFD Model Parameters L0 H0 W0 L1 H1 W1 L H Unit m m m m m m m m Value 4 2 2 1.6 0.8 0.8 0.12 0.48 Besides, entrance boundary conditions for CFD calculating model are set to meet zero initial flow velocity and pressure, while exit boundary conditions are set as velocity and pressure gradient are zero, which can be expressed as: , (3) Other boundaries are set as symmetrical boundaries, and turbulent flow model is selected for the CFD simulation.
[6] Wang G, Shen L, Hu T, Kinematic Modeling and Dynamic Analysis of the Long-based Undulation Fin of Gymnarchus Niloticus[C], The 9th International Conference on the Simulation of Adaptive Behavior (SAB'06), Roma, Italy, 2006
Xie, Design and Simulation of the Undulate Machine Imitating the Motion of the Long Flexible Fin, Machinery Manufacturing, 2005, 43(493): 21-23
Wang etc, Simulation Platform for Fishlike Swimming, Applied Mechanics and Materials. 2013.11, 461: 451-458.

CFD Analysis of Wind Loads on Permeable Low-Rise Structures Isam Janajreh Masdar Institute of Science and Technology, Abu Dhabi, UAE, P.O.Box 54224 ijanajreh@masdar.ac.ae Keywords: Computational Fluid Dynamics (CFD), Permeable structure, Darcy equation.
Numerical simulation (CFD) provides an attractive parametric study and offers a richer, higher resolution data output.
A simple wind tunnel simulation for low-rise structures reveals large discrepancies.
The 3D simulation is used to back up the obtained 2D pressure map.
Fig. 4: Displacement and out of the plane bending moment under L-ASCE and R-CFD code values Conclusion.

Simulation of Wind Effects Embracing a Complex Shape Super High-Rise Steel TV Tower Using CFD Yaya Tan1, a, Chunxiang Li 2,b 1 Department of Civil Engineering, Shanghai University No.149 Yanchang Rd., Shanghai 200072, P.
As decision makers are relying more and more on the simulation results of CFD, its credibility is a critical issue.
The correspondence between numerical simulation and wind-tunnel experiments was found to have a good agreement.
The second approach is Direct Numerical Simulation (DNS).
Therefore, Flow field around the tower can be simulated and studied by CFD analysis.

Study on Flow Rate and Steady Flow Force of Hydraulic Combination Valve Based on CFD Jinyan Shi1, a 1 Hunan Railway Professional Technology College, ZhuZhou HN412001, P.
This paper analyzes flow field of the combination valve based on the CFD software.
Fig. 1 Structure dimension of combination valve While implementing CFD analysis of the combination valve, hydraulic oil is chosen as flow medium.
The main parameters of flow field simulation: inlet pressure is 24MPa, the outlet pressure is 21MPa, the oil density is 870, and dynamic viscosity is 0.0261.
Analysis of the simulation results of flow field 4.1 Flow characteristics of the valve Fig.3 shows the flow field calculation results of the combination valve port.

Effect of Piston Shape on Scavenging in a Two-Stroke Engine - A CFD Analysis Vivek Agrawal1, a, J.
The CFD solution has been obtained by using commercial CFD code STAR-CD.
First, the CFD results are compared with those of experimental values obtained from particle image velocimetry (PIV).
Free piston two-stroke engine was also optimized for higher scavenging efficiency using CFD [6].
(a) From PIV experiments (b) From CFD simulation Fig.2.

In this paper, a monolithic muffler simulation calculation model is introduced in this paper.
CFD simulation.
Experimental results validate the simulation method.
In this paper, combining methods of CFD numerical simulation and experimental validation is adopted on flow characteristics of the monolithic muffler with absorbent plates in the train air conditioning duct.
Verify the correctness of the simulation.