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Studies on Galloping of Iced Conductor based on Tower-Line Coupling System –Aerodynamic loads Hu Haojun, Wang Yuanhan, Hu Zidong School of Civil Engineering & Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei, China haojunzy@sohu.com, yhwang0062@163.com, huzd20020307@126.com Keywords: transmission tower-line system, mechanic model, aerodynamic loads, CFD Abstract.
The computational fluid dynamics module (CFX) was used for the numerical simulation of the aerodynamic characteristics of iced conductor.
Introduction Studies on galloping mainly focus on the generation mechanism, wind tunnel test and numerical simulation of galloping.
In terms of wind tunnel simulation test of iced conductor galloping, the difficulty and costs would be too large to support, thus not being studied extensively.
As for numerical simulation, the following aspects are adopted, including the simulation by computational fluid dynamics, and the simulation of galloping of iced conductors by finite element method and superposition method of mode of vibration.

For the numerical solution it is used the computational fluid dynamic (CFD) code, based on the finite volume method (FVM).
For the numerical solution it is used the computational fluid dynamic (CFD) code FLUENT®, based on the finite volume method (FVM).
In the simulations of this study, two different phases are considered: air and water.
For the numerical solution it was used the computational fluid dynamic (CFD) code, based on the finite volume method (FVM).
Elangovan, Simulation of irregular waves by CFD, World Academy of Science, Engineering and Technology, V. 5, pp- 427-431, 2011

As a part of the research the numerical simulation of the process was carried out.
Through the simulation in any CFD-code, e. g.
Simulation setup General FE-code description.
Probably the reduction of time step can clear the temperature gradient pro simulation step in a run.
This fact strengths the obtained simulation results for the thermal problem, showed in Fig. 1, there the temperature values were in range 0,2 – 1°C pro simulation step.

Along with the rapid development of China's economy, the CFD technology has become an indispensable new technology in industrial production, and it plays an important role in the development of industry.
The investigation was carried out in a mixer, which its internal flow of the 3-d numerical simulation.
Through the simulation result, can conclude that the numerical simulation method can truly reflect the interior complicated flow state of mixing machine, and can provide theory basis for the design and improvement of the mixing equipment.
The mixer 3-d model and grid partition This research based on FLUENT6.3 simulation software, analogue simulation selected mixer geometrical modeling and the grid division by GAMBIT software.
The technology progress of computational fluid dynamics simulation in mixing machine[J].

Simulation in 2D.
a c b Figure 4: Domain of simulation.
This explains the fact that the speed of the sintering obtained during simulation CFD is higher compared to the ideal model of Lontz and the experimental tests.
The sintering speed obtained by the CFD is higher at the speeds obtained by the ideal model of Lontz and the experimental tests.
The results of simulations are the first but representative at the coalescence of two grains.

China a jy0321scl@163.com, b bqgu@njut.edu.cn, c xlhngd@163.com Keywords: Volute casing, Strength, Stiffness, Centrifugal pump, Numerical simulation Abstract.
The strength and stiffness of the volute casing made of PMMA used for PIV measurement were investigated by fluid-structure interaction (FSI) simulation in consideration of the impeller-volute interaction.
Because the deformation of the volute casing has a relatively small effect on the flow field in centrifugal pumps, CFD and FEA solutions can be conducted independently, with loads transferred in only one direction.
The fluid pressure and shear stress obtained by CFD analysis were loaded on the inner surfaces of volute casing and suction chamber.
The method for calculating the strength and stiffness of the volute casing by fluid-structure interaction simulation using FLUENT and ABAQUS software was proposed, and a volute casing suitable for the present research was designed.

Simulation of New Wet Duster’s Nozzle Based on Fluent Shanshan Tanga, Kaisong Wangb, Chaokun Weic, Tengfei Mad School of Mechanical Engineering, Anhui University of Science and Technology, Huainan, China a1323823076@qq.com,b6668978wks@126.com,cweichaokun@126.com,d15395403497@163.com Keywords: coal dust; dust collector; nozzle; Fluent simulation Abstract.
Fluent software is a relatively popular software package in international commercial CFD (computational fluid dynamics) at present.
Fig.6 Wall pressure distribution Fig.7 Wall velocity vector distribution Conclusion In this paper, through the simulation analysis of nozzle, surface pressure and velocity distribution of the basin in different areas can be seen.It is that high pressure area in left and low pressure area in right; the speed at the exit is the fastest while the pressure here is the minimum.These research not only provide a reference for nozzle structure optimization,but also have important significance for wet duster’s future improvement.
FLUENT - fluid simulation calculating examples and engineering application(Beijing institute of technology press, China, 2010) [8] FLUENT Incorporated FLUENT User’s Guide: Getting Started[M].FLUENT Incorporated,1998
Based on Fluent since into the numerical simulation of rotary jet nozzle [J].

Numerical thin liquid layer simulation For the numerical approach we used a commercial available CFD code, termed STAR-CCM+ from the company cd-adapco.
Figure 12: Numerical result of a typical liquid layer thickness distribution at 2 curved solid surfaces at t = 20 s Since an effective simulation means an optimal spatial and temporal resolution in combination with the real time effort of one simulation including post processing, verification simulations with different resolutions of the numeric mesh and transient time steps were performed (Fig. 13).
Since the computational resources were limited, the simulation time ended with 20 seconds in each simulation run.
This is due to the ideal initial conditions in the numerical simulation.
Furthermore, the simulation shows the liquid layer thickness distribution on the curved part of a solid, too.

Simple geometric shape, ellipsoid, is selected to carry out numerical simulation.
Numerical simulation of the nonlinear waves generated by a submerged ellipsoid [J].
[7] Wang Fujun.Computational Fluid Dynamics Analysis—Software principles and applications of CFD [M].Beijing: Tsinghua university press,2004
A study on the current generating system of the deepwater offshore basin using CFD[J].
[9] Xie Junyuan, Ma Ling, Hu Zhen.Motion simulation research on deep-sea human occupied vehicle[J].

Feng et al.7 conducted the measurement and numerical simulation of the periodical flow in the guide vane of a low specific speed centrifugal pump with the mixed guide vane, which provided abundant data for the further optimization of the guide vane/blade interferences.
Nowadays, more and more CFD and experimental studies are devoted to very small details of the machine performance, such as the interaction between the guide vane and the impeller.
[3] Bonaiuti D., Zangeneh M., Artojarvi R., Parametric design of a waterjet pump by means of inverse design, CFD Calculations and experimental analyses[J].
[7]Feng, J.J., Benra F.K., Dohmen, H.J., Investigation of periodically unsteady flow in a radial pump by CFD simulations and LDV measurements[J].
[8] Huang, S., Mohamad, A.A., Nandakumar, K., et al., Numerical simulation of unsteady flow in a multistage centrifugal pump using sliding mesh technique[J].