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CFD simulation of heating a Cu pipe with a safe H2/O2 flame Lars Kjäldman* and Jouni Syrjänen VTT Technical Research Centre of Finland POBox 1000, FI-02044 VTT, Finland Lars.Kjaldman@vtt.fi, Jouni.Syrjanen@vtt.fi * corresponding author Keywords: CFD, Heat transfer, Brazing.
This paper describe the application of CFD modelling to study the heating of a Cu pipe by a H2/O2 flame.
Burner cases for brazing studied through simulation.
Modeling approach In the CFD simulations the commercial Fluent (version12.1.2) code was utilized.
Simulation results Simulation results are shown in Figures 2-5 and compared to experiments in Figures 6 and 7.

Experimental Investigation and CFD Simulation of Removal Characteristics in Nanoparticle Colloid Jet Machining Xiaozong Song1,a , Yong Zhangb, Feihu Zhangc and Dianrong Luan 1 School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, China a songxiaozong@126.com, bhit_zy@yahoo.com.cn, czhangfh@hit.edu.cn Keywords: Ultra smooth surface, Nanoparticle colloid jet, Submerged jet, Computational fluid dynamics Abstract.
The corresponding material removal experiments in nanoparticle colloid jet machining have been done to validate the rationality of the CFD model.
(a) (b) Fig.1 The schematic photograph of the nanoparticle colloid jet machining system Computational Fluid Dynamics Simulation of anoparticle Colloid Jet In this study, the process of nanoparticle colloid jet are investigated using incompressible flow type CFD with the conventional k-ε turbulence model.
According to the CFD simulation result of axial velocity distribution, vertical ( 0θ= ° ) and aslant ( 60θ= ° ) jet impingements CFD were done at a distance of 5d away from the nozzle exit in both cases, and the diameter simulation jet interaction region is 10d, where d is the width or the diameter of the nozzles.
According to the above simulation results, corresponding experiments were done with two impact angles: 0°and 60°.

Optimization Design and CFD Study of Nature Gas Engine Inlet Jiao Yunjing1; Si Pengkun2,Zhang Zili3 ①Tianjin university Tianjin internal combustion engine institute (Tianjin, 300072) ②Chengde petroleum college (Chengde,067000) ③Dongfeng Nanchong Automobile Co.Ltd (Nanchong,637000) Email:jiaoyj1234567@163.com Keywords: Internal combustion engine; inlet port; CFD Abstract: By adopting CFD numerical simulation software, the steady numerical simulation of original engine inlet is carried on.
From the simulation of CFD, we can learn that with the different inlet, the average flow velocity increases when the swirl ratio rises in same cross-section.
Then the geometric models was built with CAD software and imputed into the CFD software.
The steady simulation was carried on to work out the simulation values.
The CAD models were inputted into the CFD software to mesh.

Therefore, a CFD model is developed to study the hydrodynamic of a rising bubble in HT.
Schematic diagram of the CFD domain.
Experimental data [8] and simulation data [9] is used for mesh validation.
From the simulation test result shown in Figure 4, little difference is shown from M1, M2 and M3 plot.
Here, it is observed that M2 mesh shows best fit with the experiment data [8] and simulation data predicted by [9].

Fault Diagnosis Research for Mine Fan Based on the CFD Sheng Fua, Xiao-Fan Dub *, Kan Luoc and Yong-Gang Xud College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China afusheng@bjut.edu.cn,bxiaofan127@yeah.net,clkcdebaqef@163.com,dxyg@bjut.edu.cn Keywords: Axial flow fan, Computational fluid dynamics (CFD), Simulation, Fault diagnosis.
CFD Numerical Simulation of Aerodynamic Performance of Mine Ventilation Control Equations.
Lastly, the simulation analysis was carried out on the fan.
Simulation results are given as follows.
Therefore, different axial fan faults can be identified and diagnosed by the method of CFD simulations analysis.

Employing field surveys and CFD simulations, the atrium ventilation of the selected housing building layouts were studied and compared.
Product Simulation Design Product Design NOW (with computer simulation) PAST (without simulation) Fig. 1 Comparison of the process of product design with and without simulation CFD Simulation in Housing Planning and Design.
For the first group of studies, most relevant research used CFD tools to conduct simulation analysis.
This study employed the numerical simulations of computation fluid dynamics (CFD) and the FLUENT software to address the proposed research questions.
Based on the above research findings, one can see that the research results using CFD simulation are consistent with some basic urban design guidelines.

CFD Simulation and Retrofit of Natural Vventilation in a Steel Workshop Yaxin Su1, a and Xin Wan2, b 1School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China 2Wuxi Municipal Project Quality Control Station, Wuxi 214011, China asuyx@dhu.edu.cn, bwanxin840207@mail.dhu.edu.cn Keywords: natural ventilation; industrial workshop; numerical simulation Abstract.
With the development of numerical methods and simulation technologies, computational fluid dynamics (CFD) calculation has become a powerful tool for natural ventilation design and investigation.
A preliminary CFD simulation was carried out to investigate the air flow inside the workshop by the same authors [9].
The present simulation was conducted on the natural ventilation in the hot bay.
Fig 9 and 10 presented the CFD results.

CFD simulation of flow characteristics in liquid-liquid ejectors Yan Zhang1, a, Yangdong Hu1, b and Lianying Wu1, c 1College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong, 266100, China aouczhangy@126.com, bydhuhd@ouc.edu.cn, cwulianying@ouc.edu.cn Keywords: liquid-liquid ejector, flow field distribution, turbulent dissipation rate, CFD simulation.
CFD modeling Ejector consists of the nozzle, the suction section, the mixing section and the diffuser.
In the simulation, boundary conditions of the working and secondary flow inlets are set as “velocity- inlet” condition.
The appropriate angle is about 24° after further simulation.
Conclusions In this paper, a CFD simulation is developed to study the hydrodynamic characteristics of ejectors with CFD software Fluent 6.3.

This research is to design the uniform airflow distribution throughout the drying chamber using CFD simulation for kenaf core drying.
Experimental work and simulation by CFD were carried out to obtain a uniform drying airflow and temperature distribution.
Jacek Smolka et al. [4] studied a numerical model of a drying oven using the CFD simulation.
The turbulent model is used in this CFD simulation.
CFD simulation is very useful in predicting the air velocity, temperature and pressure in the drying chamber.

The influence of cross angle on the flow ripple of axial piston pumps by CFD simulation Wei Xiuye 1, a, Wang Haiyan 1, b 1 (School of Mechanical Engineering and Automation, North University of China, Taiyuan, 030051, China aweixiuye@163.com, b895885372@qq.com Keywords: Axial piston pump; Flow ripple; Cross angle; CFD simulation Abstract.
This paper studies the flow pulsation of axial piston pumps of different cross angles based on CFD simulation.
First, we established the flow pulsation model with swash plate cross angle based on the noise reduction principle of the swash plate cross angle, and studied the influence of cross angle of different rotation angels on the flow pulsation based on CFD simulation.
Fig.1Relationship of swash-plate angle and cross angle Fig.2 Comparison of a single piston flow rate with different rotation direction of cross angle The study based on CFD simulation Setup of the simulation parameters The correct model can not do without a reasonable setup of boundary conditions.
Axial piston pump grooved slipper analysis by CFD simulation of three-dimensionalNVS equation in cylindrical coordinates.