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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.

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.

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 shows that leading edge Coănda-jet blowing was found to be helpful in increasing power generation at leading edge separation cases, while a TE blowing jet otherwise [15].
CFD simulation of the lift coefficient CL versus Coănda -jet momentum coefficient Cµ by De la Montanya et al. [20] and Harvell et al. [21] confirmed such notion, although there was a little difference in the jet slot place and shape of the airfoils, as exhibited in Figure 4.
Numerical simulation using commercially available Navier-Stokes CFD method is carried out and a critical scrutiny of the computational procedure and grid generation is performed.
Liu, Numerical simulations of the aerodynamic characteristics of circulation control wing sections, Georgia Institute of Technology, 2003
Ahuja, Numerical simulations of the steady and unsteady aerodynamic characteristics of a circulation control wing airfoil, AIAA, 2001

In this paper, the circle perforated grid plate as a new design has been studied for the fractal grid through a simulation process.
To analyze the turbulence intensities and axial velocity commercial CFD software – Fluent 6.3 was used to in order to predict the mean axial velocity (U mean), Turbulent Intensities (U’), Urms and Vrms.
Fig. 2: Computational domain in CFD for turbulent generator with various blockage ratio and diameter of the holes The mesh quality was be evaluated using the EquiAngle Skew (QEAS) criterion, which are lower or equal to 0.2 for more than 95 % of the control volumes.
Results and Discussion Upon completion of simulation, data was extracted on a horizontal plane (centre of the cylinder).
References [1] Vassilicos, S.L.A.J.C., Direct Numerical Simulation of Fractal-Generated Turbulence. (2009)

That is, it reduces the dependence of step in the drag reduction design, and improves the robustness of the adjoint-based airfoil drag reduction optimization design method. 1 Introduction With the rapid development of high-performance computing, the high-fidelity CFD codes such as Reynolds-Averaged Navier-Stokes (RANS) codes have been widely applied to aerodynamic design of aircraft.
The CFD-based aerodynamic design methods can be mainly categorized into two classes: optimization design and inverse design.
From an optimization point of view, both optimization design and inverse design need to solve an optimization problem by coupling optimization algorithms with CFD simulation codes.
When high-fidelity thus time-consuming CFD codes are employed, the optimization procedure becomes demanding.
The Baldwin-Lomax zero-equation turbulence model is used for turbulence flow simulation.

Energy consumption of gas-fired infrared radiant and heat exchanger by convection heating is comparative analyzed, CFD software is used to simulate fields of the temperature and the predicted percentage of dissatisfied.
Their study focused on the difference between the simulation results and the results obtained by ASHARE method, it is concluded that the ASHARE method results are 21% higher than that of simulation [5].
CFD software is used to simulate the temperature and the PPD (predicted percentage of dissatisfied) field.
Radiant heating Fig.3 Steady state of the two different heating modes Based on heat load: The simulation results of the two heating modes based on the same load are shown in Fig.3, the heat transfer coefficients of envelops are under the same conditions.
Based on the simulation, it is concluded that if the thermal isolation of the floor material is improved, more energy can be stored in the floor layer, effect of energy saving will be more significant in building application.

Study on the Influence of the Quantity of Grooves on Performance of New Balance Drum Lu Hequana, Mu Jiegangb, Zheng Shuihuac, Zhao Jinjingd, Wang Huie College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China aluhe52@126.com, bmjg1963@126.com, czneu@zjut.edu.cn, dzjjasp@126.com, e467094560@qq.com Keywords: multistage centrifugal pump, axial force, balance drum, clearance leakage, numerical simulation Abstract: A new type of balance drum with grooves was presented, and analyzed the influence of quantity of grooves on performance of centrifugal pump and balance force by the method of numerical simulation and experiment.
After that, we can study the three models by CFD software and experiments of model machine, and compare the results that achieved by the numerical simulations and experiments.
Table 2 The result of numerical simulations of the three programs Quantity of groove N 8 12 16 Leakage losses qv [m3/h] 6.624 5.764 4.583 Differential pressure ΔP [Mpa] 2.759 2.790 2.832 Experimental study Test equipment.
Application of CFD to turbulent flow analysis and performance prediction in hydraulic machinery [J].
Numerical simulation of the dynamic effects due to impeller-volute interaction in a centrifugal pump [J].

The aerodynamic load is determined using a computational fluid dynamics (CFD) software.
The simulation is done in the rated wind-speed of 10 m/s.
Fig. 3 Flowchart of the design process CFD Simulation of Wind Turbine Aerodynamic Loads The simulation is done in the rated wind-speed of 10 m/s in order to obtain the aerodynamic load.
The result obtained from CFD simulation is total pressure.
This condition eases the matching process between CFD and FEM models.