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Simulation and Optimization to Vehicle Interior Noise in Mid and High Frequency Using VAone Xin Chen1,2,a, Chang Feng Gao1,b, Xiao Hua Geng1,c, Chen Xie1,d 1State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, China 2Zhejiang Geely Automobile Institute CD.Ltd, Hangzhou.
The aerodynamic pressure on the body surfaces can be calculated by using a Fluent CFD (Computational Fluid Dynamics) model.
Fig 8 shows the measurement and simulation sound pressure level in the driver’s head cavity at 100km/h (27.8m/s).
This is related to the application characteristics of simulation theory.
The results of simulation show that the applications of PMMA can reduce the sound pressure level in mid frequency from 200 to 1000Hz effectively.

China a ymu@sdu.edu.cn, bZhaogq@sdu.edu.cn, ccrzhang@sdu.edu.cn Keywords: Viscoelastic, Swell, Finite element simulation, Profile extrusion, Polymer melts Abstract.
In the study, the viscoelastic flow pattern of a commercial low density polyethylene (LDPE) extruded through out of the hollow profiled extrusion die is investigated by means of finite element simulation.
Numerical simulation as a highly effective method can well predict such complex phenomenon as in the polymer processing and hence to explain relevant mechanism.
However, viscoelastic flow simulation still remains a challenging task in Computational Fluid Dynamics (CFD).
The finite element simulation is thereafter conducted in the adjusted flow field and the process is repeated until the maximum coordinate difference between two iteration steps is less than the tolerance.

Besides, the accuracy of the simulation model has been verified by calibration.
Study on the Envi-met simulation model ENVI-met, a kind of CFD (Computational Fluid Dynamics) software is a microclimate simulation software to simulate and evaluate the outdoor thermal environment on the local scale through thermodynamics and heat transfer theory, and it has a widely application for urban environment evaluation.
In addition, the numerical simulation of ENVI-met has been calibrated and verified to evaluate the cooling effects of greening.
Methodology In the research, computer simulation was combined with on-site measurement of environmental parameters, including two steps: (1) Model calibration, namely the difference between the simulation results and on-site test values is within the range of the instruments errors, which means the simulation model could be considered as the representative of the real environment and is acceptable to evaluate and predict the thermal environment; (2) Simulation of the scenarios.
To ensure the reliability of simulation results, the LBC parameters verified before were adapted in the simulation (Table2).

The simulation is based on the Favre-averaged Navier-Stokes equations coupled with Wilcox’s turbulence model.
The numerical simulation is used to investigate in detail the flow physics for a range of the pressure ratio .
The purpose of the present work is a numerical simulation of the injection of the round sonic jet perpendicular to the supersonic flow in a channel and studied in detail vortices systems and flow physics at the moderate and high value of the pressure ratio.
The comparison highlights the qualitative agreement between the experiment and CFD.
The numerical simulation was applied to investigate in detail the flow physics for the range of the pressure ratio .

In this paper, air distribution was simulated at different air supply angle and different air supply velocity by the CFD method, and then evaluates indoor thermal comfort.
Fig.1.Office physical model Numerical Simulation Mesh Generation.
Concrete boundary conditions of numerical simulation as shown in Table 1.
Table 1 Boundary conditions of numerical simulation.
A zero-equation turbulence model for indoor airflow simulation [J].

Beata Niezgoda-Żelasko et al. [7] simulated the momentum transfer characteristics of ice slurries in a horizontal pipe under the adiabatic condition via CFD.
Studies on the flow and heat transfer properties of ice slurries by simulations using Fluent have received only a little attention in the literatures.
Simulation Methods Physical Model.
Simulation Method and Parameters.
According to the characteristics of ice slurries and the flow within the channel, the mixture model and k-Epsilon turbulence model are selected in the simulation.

Numerical Simulation of Taylor Couette Flow in Bioreactor Li Yea, Zhengming Tong b,Jialei Lu, Kai Zhu, Chao Li School of Energy and Power Engingeering，University of Shanghai for Science and Techenology, Shanghai 200093，China asarah_shine@163.com, btzm1590041495@163.com Keywords: Taylor-Couette flow, Taylor vortex, bioreactor, numerical simulation.
Grids near boundary layers are treated by local grid refinement techniques in order to achieve better simulation results, and convergence is considered to be reached when residuals of each solved parameters descend in three order of magnitude and keep steady.
The growth process of Taylor vortexes along with the increasement of Re values illustrated in figure 2 is identical to that observed in experiment[8], and thus validity of the simulation model is confirmed.
Conclusions Taylor Couette flow in bioreactor at different Reynolds numbers are investigated using CFD numerical simulation technique.
Simulation results show that Taylor vortexes are generated and developed gradually along with the increasement of Reynolds numbers, and will fill the whole field when critical Re value is reached.

A set of numerical simulations were conducted to estimate the change in entropy generation in swirl stabilized CH4/air flames due to H2 addition to the fuel.
Discussion and Conclusion In the present paper, numerical simulations of the entropy generation in turbulent swirl flame have been conducted.
Sies, Numerical simulation of confined vortex flow using a modified k-ε turbulence model, CFD Letters, 1(2) (2009) 87-94

In this paper are presented some CFD results regarding combustion in an aircraft turbojet engine, for aviation fuels consisting of hydrocarbon mixtures.
The simulations were made in Fluent software and some results are presented in the following pictures Figs. 4 and 5.
For an aircraft engine the experimental validation is expensive, so the first step in this study is the simulation of the virtual model of constructive elements, like combustion chamber.

A simulation study for high temperature chemical vapor deposition (HTCVD) of silicon carbide (SiC) is presented.
Numerical simulation [3-6] could be a powerful tool to design a reactor and to determine growth conditions.
Simulation Method Gas Phase Reaction Rate.
Commercially available software CFD-ACE+ was used under a two dimensional model.
Main part of the simulation was the same of the Ref