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A Study on Large Power Jet Ventilation Technology in Long Tunnel Construction Heng Zhang 1, a, Shougen Chen 1,b and Liang Chen 1,c 1School of Civil Engineering, Southwest Jiaotong University, Chengdu , Sichuan, 610031, China azhangheng198517@126.com, bcsgchen2006@yahoo.com.cn, cclng9716@163.com Keywords: Jet Fan Ventilation, Numerical Simulation, CO Concentration.
This paper investigated the simulation of tunnel construction ventilation with large power jet fans during the construction of Jinping Auxiliary Tunnels by using the computational fluid code FLUENT, the layout of jet fans in the tunnels is optimized.
CONCLUSION By applying the CFD software—Fluent to simulate the air flow under various layout of the jet fan in the cross and longitudinal sections.
Numerical simulation study on ventilation flow field of wall-attached jet in heading face[J].

The whole field are computed based on the Navier-Stokes equations, utilizing the commercial CFD software FLUENT.
Fig.3 Time series of wave elevations at x=46.6m and comparisons of present model results and analytical results(left: U=0.3m/s,right: U=-0.3m/s) Simulation of the Oil Shape Variation before Boom The variation of the oil slick thickness with time is predicted based on this numerical experimental platform.
The major features of this platform are: (1) incorporation of the movement response of floating boom which is accomplished by the dynamic grid algorithm; (2)local three-phase model for simulation of the oil slick profile;(3)VOF method for the simulation of the oil-water interface.
[5] Lin Zhao, Zegao Yin, et al, “Numerical simulation of the combined wave-current force distributions on large-scale under water objects,” In Asme International Mechanical Engineering Congress and Exposition, 2009

According to the two aspects of the teaching method and its realization, the various experiments are designed based on virtual design and computer simulation.
Through teaching, discussions and virtual simulation experiments combined, with the main line of virtual design, the cultivation of students innovative design ability is realized.
In the courses of testing technology, electromechanical transmission, mechanical and electrical integration system, Matlab software and its toolboxes can be used for system simulation and numerical analysis.
Fig. 3 Analysis of nozzle jet based on Fluent Figure 3 is the simulation of different pressure and different flow characteristics of nozzle jet flow using Fluent software when students study the fluid mechanics and hydraulic drive courses.
A study of abrasive water jet characteristics by CFD simulation, Journal of Material Processing Technology, vol. 153, p. 488-493, 2004 [5] Elmagroud Bachir, Ziyyat Abdelhak.

Please refer to Table 1 for the boundary condition of numerical simulation calculation.
Simulation of indoor air flow in ventilated room by zeroequation turbulence model[J].
A zero-equation turbulence model for indoor air flow simulation[J].
A simplified system for indoor airflow simulation [J].Building and Environment, No.4(2003), P.543-552
CFD and architectural environment design[M].

Samawe et al. [7] manufactured a SS prototype for CO2 separation from NG with 70% CO2 to validate a proposed CFD model.
The experimental results led to improvements in CFD numerical modelling and successfully validated and proved the concept of CO2 separation by SS.
After simulations and technical results, the three cases are compared in terms of power consumption and CO2 emissions.
Castier, Modeling and simulation of supersonic gas separations, J.
Jin, Numerical simulation of CO2 condensation process from CH4-CO2 binary gas mixture in supersonic nozzles, Sep.

(4) Aerodynamic force generalization method In this article, aerodynamic analysis is performed by taking ANSYS/CFD/ FLOTRAN into account.
ANSYS is a multiphysics product and one of its features is CFD solution of fluid systems by FEM approaches.
Reddy,” Unsteady cascade aerodynamic response using a multiphysics simulation code”, NASA Glenn Research Center, January 2000, NASA/TM-209635
Root locus plots of the eigenvalues of the specified blade with uncambered airfoil (top) and cambered airfoil (bottom) Fig. 2 Time simulation of pitching/plunging vibration of the blade with uncambered airfoil (top) and with cambered airfoil (bottom)

Both experiments and CFD method were used to investigate the heat transfer and flow resistance characteristics of twisted tubes under a single-phase condition.
Bishara et al. [7], Yang et al. and Zhou et al. used the CFD method to analysis the fluid heat transfer and flow characteristics in both tube and shell side due to the special swirling configuration of twisted tube.
[7] Bishara F, Jog MA, Manglik RM, “Computational simulation of swirl enhanced flow and heat transfer in a twisted oval tube”, J Heat Tranfer-T ASME, vol.131, no.8, 2009
[9] Zhou JC, Zhu DS, “Numerical simulation of fluid flow and heat transfer in shell side of twisted tube heat exchanger”, Chem Eng, vol.39, no.5, pp.59-62, 2011

In this study, we changed main geometric parameters of rectangular sharp-crested weir and did experimental investigation combined with CFD numerical simulation in order to determine water surface relation of two types of flow regimes, to find out the head-discharge relation in clinging flow, and to extend flow measurement range for rectangular sharp-crested weir.
Numerical simulation model.
For numerical simulation of sharp-crested weir flow, Fluent software and k-ε turbulence model is applied to obtain the flow parameters[1].
The fractional volume of fluid (VOF) method[4] used in the simulation is an efficient method for treating the complicated free-surface problem[5,6].
Unsteady algorithm is applied in the simulation and the time step depends on the size of the grid and the flow velocity.

The computational static aeroelastic simulations are performed in the finite element method based commercial software ANSYS-14.
Garcia, et al [8] developed a nonlinear aeroelastic analysis that directly couples a three-dimensional nonlinear beam model to a high-fidelity-nonlinear CFD model.
The computational static aeroelastic simulations are performed in the finite element method based commercial software ANSYS-14.
CFD-BASED ANALYSIS OF NONLINEAR AEROELASTIC BEHAVIOR OF HIGH-ASPECT RATIO WINGS, 1–10

Numerical Analysis on the Influence of the Unsteady Effect upon the Flow Characteristics in a Human Airway Kun Hyuk Sung1, a,Hong Sun Ryou1,b 1School of Mechanical Engineering, Chung-Ang University, 221 HeukSuk-Dong, DongJak-Gu, Seoul 156-756, Republic of Korea ailmare.khs@live.co.kr, bcfdmec@cau.ac.kr Keywords:CFD, Human Airway, Unsteady effect, Turbulence Kinetic Energy, Recirculation zone, Secondary Flow Intensity Abstract.The focus is on the unsteady effect on the flow characteristics considering the real respiration in a human airway.
Lessmann, Computer simulation of the flow field and particle deposition by diffusion in a 3D human airway bifurcation.
Wilcox, Turbulence modeling for CFD, second ed., DCW Industries Inc., Canada, 1998