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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.

Previously, it was carried out a computational fluid dynamics (CFD) calculation [10] to obtain the temperature produced by the gas flow on the blade surface.
The CFD domain was considered between the end of the first stage and the beginning of the second stage nozzle.
Lu, Finite Element Simulation on Thermal Fatigue of a Turbine Blade with Thermal Barrier Coatings, J.

The flow characterizations through periodical variable cross-section passage are performed by numerical simulations in the one wavelength passage with periodic inlet and outlet boundary conditions.
Guzmán and Amon [9,10] performed numerical simulations in converging-diverging wavy channels.
A commercial CFD software Fluent is used to obtain the numerical solutions.
To raise the accuracy of simulations, the grid independence is carried out.
Conclusion Flow patterns in a single-period channel with fully developed periodical flow in transient regime have been investigated through accurate numerical simulation.

Method Virtual prototyping involves integrated use of computer aided design (CAD), Finite element analysis (FEA)/Computational Fluid Dynamics (CFD) and multi body system (MBS).
It enables simulation of the production systems to the finest details.
The complexities of the simulation process came out of simulation definition which outlines in value of the production process.
Globally recognized definitions of simulation are outlined below.
The simulation model in the Virtual Factory Environment (VFE) includes static and dynamic simulation functions.

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

Combustion phenomenon is very unintelligible; therefore fully simulation of flow in this process needs a large amount of cost and time.
Understanding these processes and being able to represent them in the context of a CFD simulation program is of great importance both for researchers and for the industry.
CFD offers a significant and a powerful tool to evaluate the operation of practical combustion systems and helps designers of these systems to come up with modified versions that have better performance characteristics.
Different previous researches investigate, both experimentally and by numerical simulation, the vaporizing sprays and the droplet interaction under different operating conditions; see for example references [1–8].
The numerical procedure used in this simulation is based on the discrete-droplet model (DDM).

Numerical simulation of petroleum reservoirs Numerical reservoir simulation was commonplace in the petroleum industry in the 1960s [1], and we have since applied it in several areas.
Currently, simulators are more robust and incorporate more physical phenomena than their precursors, including recent Computational Fluid Dynamics (CFD) techniques [4].
Simulation of unconventional reservoirs The numerical simulation of flow in petroleum reservoirs [6] is a conventional tool in the oil and gas industry, mainly applied to predict production scenarios.
Thurnau, H. van Pooçen, The fluid flow simulation equations, SPE Symposium on Numerical Simulation of Reservoir Performance, Dallas, Texas, USA, 1968
Phillips, GPU Accelerated Approach to Numerical Linear Algebra and Matrix Analysis with CFD Applications, MSc thesis, University of Central Florida, USA, 2014

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].

Summary In this study, the refractory wear of blast furnace main trough has been numerically analyzed by CFD technology, resulting in the highlights below
Park, CFD simulation of condensing vapor bubble using VOF method, World Academy of Science, Engineering and Technology 36 (2009) 209-215

The turbulent model is as described in [10].The k-ε turbulent model is used in the simulation, with VOF and Geo—Reconstruct method to trace the liquid-gas interface.
As shown in Figure 7, simulation results reveal that the bubble in the mixing chamber experienced a complex process of accelerating and expansion while flowing downstream to the exit.
Figure 7 Simulation result of bubblly flow Results show the flow pattern nearby the exit orifice.
(a) (b) Figure 8 VOF result near the exit Simulation also show that the time intervals between micro bubble generates can be less than10-5~10-6 s, and in the same order of time, the micro bubble pass through the exit orifice.
Turbulence Modeling for CFD.