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This paper focuses on the effects of helium injection on the cooling performance of glass fiber cooling unit in high-speed optical fiber manufacturing, and it will present the numerical investigations of glass fiber cooling process by using the flow and convective heat transfer modeling and CFD computations.
A multi-propose commercial CFD software, FLUENT 6.3, has been employed in solving the governing equations for continuity, momentum, and energy for the numerical simulations of flow and temperature fields for both cooling gas and fast moving glass fiber.
All the simulations used the block structured computational mesh and the total number of quadrilateral cells is approximately 125,000.
Note that the species transport of two gas components is also included in the simulations.
Due to large temperature variation, temperature dependence of thermal conductivity and viscosity for the cooling gas is also considered in the simulations.

Developing the virtual experiment software by applying modern Computational Fluid Dynamics(CFD)[3] and computer technologies, letting students carry on experiments under virtual circumstances, is an effectual approach to solve the problem above.
In this paper, taking Mensurate Airfoil Pressure Distribution virtual experiment [4] as an example, the design and implementation of virtual experiment, the numerical simulation method were introduced.
Brief introduction to numerical simulation method Control equation.
As the study on airfoil pressure distribution cannot ignore the viscosity of air, so in numerical simulation three-dimensional N-S equation which includes viscous items was used as the control equation
The Role of Computer Simulation Experiments in Physics Experiments Teaching.

In addition, we also carried out flow visualization and computer simulations regarding the movements of thermo-fluid inside a display cooler.
CFD Analysis.
In the present study, we simulated a steady-state velocity and temperature field of a full-scale display cooler without partition plates inside a cooling compartment, with a commercially-available CFD program (Fluent 6.2).
In this simulation, the standard k-ε turbulence model and segregated solver are used.
According to the results of the CFD simulation, uniform temperature distribution inside the chamber could be substantially influenced by the entrainment flow from the bottom-plate inlet.

Simulation results of the SSG turbulence model matched well with the experimental results [13].
On reviewing various literatures, it is understood that experimental studies, analytical studies and numerical simulations are performed for turbulent flow conditions.
Unstructured tetrahedral mesh is generated for the whole domain by ANSYS ICEM CFD 13.0©.
Numerical simulations are performed with commercial CFD code, ANSYS Fluent 13.0©.
Addad, Numerical simulations of flow and heat transfer over rib-roughened surfaces, Proceedings of the 17th Annual Conference of CFD Society of Canada, Ottawa (2009) 8 pages

Numerical simulation is developed in this paper for these two cases.
Numerical Simulation on Heat Transfer Calculation of a Pipeline Numerical simulation of heat transfer in pipelines with seams and annulus.Temperature field of a pipeline which has been tested during operating is numerically simulated by CFD.
Fig.3 Temperature field of a pipeline with seams and annulus Fig.4 Local temperature field of the insulation joints Numerical simulation of heat transfer in pipelines with insulation sinking.Temperature field of a pipeline which has been tested during operating is numerically simulated by CFD.
Fig.5 Temperature field of a pipeline with insulation sinking Conclusion Numerical simulation is developed in this paper for two cases.

Possibilities of simulations in the planning of the retrofit of historical double skin windows Dániel Bakonyi1, a, Gábor Becker2,b 1,2Budapest University of Technology and Economics, Faculty of Architecture, Department of Building Constructions, 1111 Budapest, Műegyetem rkp. 3.
Figure 2 Isotherm plots for an IG unit (left) and the glazing of a double skin window (right) for typical winter boundary conditions (Te=0[°C], Ti=20[°C]), the result of CFD simulations by the authors.
We can find many such correlations in the literature (see: [2, 3]) which are all based on either experimental data or CFD simulations.
Gronau and Helbig [11] and many others since then have used CFD simulations to demonstrate the same effect, but for airflow-windows, where the airflow is controlled and one directional.
Models for whole window heat transfer The multidimensional heat transfer through window frames and the edge of glass area is usually calculated with 2D heat flow simulations based on either the finite element or the finite difference method.

From these simulations, we can get the date of natural lighting and ventilation, which can be used to guide the design process and thus the weakness of earth-sheltered architecture can be solved by using the above means.
The chat of light-pipe system and the simulation diagram and the simulation diagram of natural lighting of the daylighting underground after using light-pipe systemin building one and two layers 2) Natural ventilation The earth-sheltered architecture all around is closed, so natural wind is hard to be brought into the room from the outside and so do the ventilation indoors.
The Fig.10 shows the good effect of natural ventilation of the Chongqing Empirical Study Center of Building Energy Conservation which is simulated by CFD.
The Fig.11 shows the good effect of natural ventilation caused by heat pressure from the Daylighting atrium which is simulated by CFD [7] , and the wind speed reaches 3m/s at the wind outlet of the Daylighting atrium.
Two-step Optimal Design Method Using Genetic Algorithms and CFD-coupled Simulation for Indoor Thermal Environments [J].Applied Thermal Engineering, 2007, 27(1):3-11.

Based on Computational Fluid Dynamics (CFD) method and the wave theory, the analysis of hydrodynamic characteristics is made for a wave-piercing catamaran (WPC) in this paper.
Fig. 6 Contrast diagram of trial value and calculated value Fig. 7 Resistance results Fig. 8 Resistance coefficients Conclusions Based on computational fluid dynamics (CFD) and wave theory, this paper optimized the demi-hull spacing of a WPC with the help of FLOW-3D. 1.
The simulation method which is proposed in this paper estimates the working performance of WPC well at service speed.
The simulation method proposed in this paper can replace part of the model test to save the costs, which has a certain practical significance.

The model throughout all simulations was run at a constant speed of 1500 rpm.
Similar to these previous studies, the CFD (Computational Fluid Dynamics) tool used was the ANSYS-CFX 14.0 program.
Computer Modeling Computer modeling requires the development of simulation models, meshing and setting up boundary conditions before a simulation can be run.
The in-cylinder flow of the motored engine was studied using the commercial CFD package ANSYS; ANSYS-DesignModeller, ANSYS-Mesh and ANSYS-CFX [10].
Gil, CFD modeling of the in-cylinder flow in direct-injection Diesel engines, Computers & Fluids, 33 (2004) 995-1021.

Large Eddy Simulations of Flow past a Circular Cylinder With/without an Upper Rivulet Xiaoqing Du1, a,Yan Zhao1, b 1Department of Civil Engineering, Shanghai University, Shanghai, China axqdu.shu@gmail.com, bzh_yan@live.cn Keywords: Stay cable; Rain-wind-induced vibration; Upper rivulet; Large eddy simulation; Aerodynamic force coefficient Abstract.
Large eddy simulation (LES) is utilized to simulate flow around a circular cylinder with/without an upper rivulet at Reynolds number 70000.
With the improvement of CFD technology, CFD numerical simulation is also utilized in this research field.
Yeo and Jones [4] conducted a simulation of full developed turbulent flow past a yawed and inclined smooth circular cylinder at Re=1.4×105, and the detached eddy simulation (DES) method is adopted.
Finite Volume Method is introduced for spatial discretization in the simulation.