Search results

Numerical Simulation of Indirectly Heated Hot Water Heater Richard Lenhard a, Katarína Kaduchová b and Jozef Jandačka c University of Zilina, Faculty of mechanical engineering, Department of power engineering, Univerzitna 8215/1, 010 26 Zilina, Slovakia arichard.lenhard@fstroj.uniza.sk, bkatarina.kaduchova@fstroj.uniza.sk, cjozef.jandačka@fstroj.uniza.sk Keywords: Numerical Simulation, heated hot water heater, CFD method Abstract.
Subsequently been made CFD simulations of the device, and those were compared with a mathematical model to verify the accuracy of the proposed mathematical model of heating hot water for indirectly heated hot water heater.
Fluent is common CFD software which defines boundary conditions, which are a precondition for the correct calculation [2].
The CFD model was reached, heating time 40 min.
CFD simulation results will be verified on real models, if the results are consistent with the CFD model, we use a CFD model for further simulations.

With the developments of the computer science and CFD software itself, CFD has been applied into every field in engineering which can save the cost and time of research.
Compared with the actual experiment, the CFD simulation technology can save a large number of testing time.
In addition, the application of the CFD simulation technology does not need the actual model to reduce the testing cost.
Wang used 2D CFD model and conducted the simulation to HTST and UHT sterilization, and she came to a conclusion that different consuming time for different heating temperatures of sterilization [10, 11].
CFD simulation approach The size of model for pasteurization sterilization was followed the actual can which was 7.85cm, 2.65cm and 0.15cm for length, radius and wall thickness, respectively.

The Stirring and Heating CFD Simulation Strategic Research on Food Waste Biological Treatment Processor Deyu Song1, a, Song Lin2,b 1Department of Mechanical and Electrical Engineering, North China University of Technology, Beijing, 100144, China asongdeyu123@163.com, blinsong2000@126.com Keywords: Stirring, Heating, Heat pipe, Simulation, CFD, MRF.
In recent years, with the development of CFD（Computational Fluid Dynamics）, the flow field simulation technology as an effective research method, provide an important guidance for the inner simulation of flow and temperature field on a certain extent.
In 2000, Jaworski etc. [5] used CFD make an inside mixing process simulation of one double Layer six vertical blade turbine stirring tank.
By referencing the CFD method goes on with the established model’s inside temperature simulation analysis.
Simulation model and method Fluent is one of the CFD soft wares that currently in the leading position in the world, which is specialized CFD software used for the simulation and analysis of fluid flow and heat exchange problem in the complex geometry area.

Results and Analysis The result of CFD simulations for pressure distributions at the design 20º pitch angle are showed in Fig. 2.
The results of the CFD simulation are compared with the results of a set of experimental tests for MCT model at a designed blade pitch angles 20° as shown in Fig. 3.
For TSR > 6 both simulations tend to over predict the power coefficients.
Summary A comparison with the experimental results and other simulation results shows the applicability of using CFD as the tools to predict the hydrodynamic performance of horizontal axis MCT.
The agreement between all experiments and predictions was demonstrated for the design case at blade pitch angle 20º.The accuracy of the predictions is satisfactory for using the CFD simulation techniques to design the MCT.

Analysis and Evaluation of Wind Turbine Flow Field and Noise Simulation based on CFD Software WengLingxiao1, a, XuJiunan1,b and HuZhixin 1,c 1Nanchang Institute of Science & Technology, Nanchang, 330108,China a474458032@qq.com, b112226699@qq.com, c674178295@qq.com Keywords: CFD software, FLUENT simulation, K-e model, AutoCAD software, Unstructured grid, Noise field.
CFD is the abbreviation of the computational fluid dynamics, which is widely used in engineering fluid simulation.
Overview of Fan Flow Field Simulation and the Noise based on CFD Software CFD numerical simulation calculation is a complicated process, accurate calculation is influenced by many factors, including the size of grid, boundary settings and computer software and hardware equipment [3, 4].
Fig. 1 CFD calculation flow chart Fig. 1 shows the specific process of CFD calculation.
Simulation and test of hot and humid environment in natural ventilation glass greenhouse based on CFD.

CFD Simulation of the Fused Silica Synthesis Furnace Tao Feng1,a, Peiyong Wang1,b 1Department of Aeronautics, Xiamen University, Xiamen 361005, China a19920101152754@stu.xmu.edu.cn, bpeiyong.wang@xmu.edu.cn Keywords: Fused Silica, Optical Uniformity, CFD, CVD, STAR-CD.
A CFD simulation has been carried out for an industrial furnace and process.
The overall chemical reaction can be described as: 2H2 + O2→ 2H2O; SiCl4 + 2H2O → SiO2 + 4HCl Horender et al. [5] reported a CFD simulation of silica synthesis process; the qualitative match between the simulation and experiment is acceptable, it proves the feasibility of CFD simulation in silica synthesis.
Through the user subroutine coding, radiation modeling was included in the CFD simulation of the fused silica furnace.
It proves the appropriateness and feasibility of the CFD simulation method used in the paper.

CFD Simulation of the Fluidized Bed Applied in the Synthesis of Benzene Series Organosilicon Xinfeng Han1,a, Jianlong Li*1,band Ning Xu2,c 1College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People’s Republic of China 2First People’s Hospital of Yunnan Province, Kunming, 650021, People’s Republic of China ahxf167@126.com, bljlong@qust.edu.cn, cxuning_0629@yeah.net Keywords: fluidized bed, CFD simulation, fluidization characteristics Abstract.
The CFD simulation was carried out with commercial software FLUENT6.3 by using Eulerian-Eulerian multiphase models, based on the kinetic theory of granular flow and PC-SIMPLE algorithm.
As the most specialized and functional CFD software, FLUENT was adopted to perform the simulation of fluidized bed.
Fig. 1 Geometry of the simulation system Table 1 and Table 2 summarize the values of model parameters/conditions applied for the CFD simulation of the 2-dimensional fluidized bed in this study.
Conclusions The CFD simulations were performed applying the theory of particle dynamics.

CFD Simulation of Curved-roof Subjected to Thunderstorm Downburst CUI Bi-qi1, a, CHEN Yong1, b 1Institute of Structure Engineering, Zhejiang University, Hangzhou 310058, China amybiqi@gmail.com, bcecheny@zju.edu.cn Keywords: thunderstorm downburst; CFD simulation; curved-roof; pressure distribution Abstract: Thunderstorm downburst is a sort of outburst strong wind on or near the ground, and its wind field characteristics are significantly different from boundary layer winds.
Computational fluid dynamics (CFD) was employed for this stationary downburst simulation, also the wind pressure distributions of the curved-roof in this flow had been surveyed by varying the parameters of the structure.
In recent years, numerical simulation that is based on CFD technique has shown good prospects for the researches who interested in the thunderstorm downburst.
Numerical Simulation Commercial CFD software, Fluent 6.0 was employed to simulate the thunderstorm downburst, and a full-scale three-dimensional (3D) stationary model was adopted.
Numerical simulation of thunderstorm downdrafts.

A Two-dimensional CFD Simulation for Different Spacers of Spiral Wound Moudles Songlin Xua, Wenqiang Mib School of chemical engineering and technology, Tianjin University, Tianjin 300072, China aslxu@tju.edu.cn, bmwq718@gmail.com Keywords: Computational Fluid Dynamics (CFD), Membrane Spacers, Velocity, Pressure Loss.
Applications of two-dimensional CFD simulation give a visual method to determine the advantages of each spacer type.
CFD Simulation Problem Description and Assumption.
Simulation.
Different simulations with different Reynolds number values were carried out.

GPU accelerated CFD simulation in electronics cooling Howard Sun 1, a, Yongquan Zhou 2,b and YongSheng Liang 2,c 1Novacompute company, Los Altos, CA, USA 2Shenzhen Institute of Information Technology, ShenZhen, China aHoward@novacomputer.com, bzhouyq@sziit.com.cn, cliangysl@sziit.com.cn Keywords: GPU, CFD, Electronics cooling, 3D Navier-Stokes solver , Algorithm Abstract.
CFD(Computer Fluid Dynamics) simulation is widely used in IT industry, it usually based on the latest CPU computing power and software technology, can easily take hours even days.
The GPU accelerated CFD simulation by using massively parallel algorithm accelerated the calculation by 3.55 times.
Introduction CFD based numerical simulation has become a part of the standard procedure in thermal design and analysis of electronic systems.
The results demonstrated the high speed achieved by using leading GPU technology to accelerate CFD simulations in electronics cooling.