Search results

The results of CFD simulation have good consistency with the experimental test results, and it verifies the conclusion that the tail dome is good for drag reduction.
Through CFD simulation and physical model tests respectively, it verifies that to install a dome at the end of the van is good for drag reduction.
Three different types of tail domes were designed based on the mechanism of reducing pressure drag between the front and rear of vans in this paper, and CFD simulation is carried out in the Fluent.
The CFD simulation 2.1.
They can be obtained by CFD simulation.

Methodology In order to run CFD simulation, the design of car model has been created using AutoCAD software.
Both configurations need to be provided before running it into wind tunnel test and CFD simulation.
The spoiler 3 model had highly percentage of different between wind tunnel test and CFD simulation results.
As the conclusions from the CFD simulations analysis, the values obtained are similar to the value of the wind tunnel test results.
This may indicate that the use of CFD simulation is much easier when compared with the wind tunnel test, because the simulation can reduce the cost of experiments, saving time and energy.

The results agree well with experimental global flow rates and temperature values and show the feasibility of 3-D CFD-based simulations in grinding applications.
The fluid used in numerical simulation is water, with viscosity that linearly depends on temperature: 0.001002 Pa∙s at 20oC, and 0.000282 Pa∙s at 100oC.
Conclusions 3-D models created in this study proved the practicability of CFD based simulations in grinding.
Simulations using the proposed numerical models yielded detailed data and realistic fluid behavior.
The results of simulations matched useful flow rates, temperature, and pressure experimental data.

With reference to the experiences in previous numerical simulations in this paper, CFD is used for analyzing two forms of return air in the cold store with the Finite Volume Methods and the SIMPLE Revised.
Computational Fluid Dynamic (CFD) is a simulation tool which predicts fluid flow behavior and transfer of heat.
The previous study has demonstrated the feasibility of CFD simulation applied in the flow field of the cold store.
Steady numerical simulation analysis The CFD predicted temperature field of both return air styles under the steady state conditions in the cold store were shown as follow.
[12]　Xie J，Qu X H, Shi J Y, et al．Effect of design parameters on flow and temperature fields of a cold store by CFD simulation[J]．Journal of Food Engineering，2006, 77 (2)：355~363.

China a emaill: panxqcx@sohu.com Keywords: Mold Filling, Numerical Simulation, CFD, NHT, Interfacial Tracking Abstract.
As a debut, the general-purpose CFD software is used to establish the practicable mechanical model for the simulation.
As a debut, the general-purpose CFD software - FLUENT [12] acts as a tool to establish the practicable mechanical model for numerical simulation on mold filling process of casting.
In applications of CFD, the aforementioned equations and their solving process as well as the consequent postprocessing are generally called RANS-based simulation.
(a) Velocity vector (b) Pressure contour (c) Temperature contour Figure 2 Distribution of main physical fields in the filling process by simulation (t=5.619s) 5 Conclusions With a view to applying advanced CFD techniques to industrial practice, this paper, by means of general-purpose CFD software for the first time, carried out a simulation on mold filling of casting.

CFD simulations concerning diffusion fields completed.
In recent years, a number of numerical simulation studies using computational fluid dynamics (CFD) to predicted indoor particles distribution and deposition.
A study verifies that different particle and droplet CFD models provide different simulation results in which the size of particle and droplet is a critical justification factor by Liu and Zhai [6].
Setup of simulation The above-mentioned different ventilation strategies room was modeled by CFD method.
In this numerical simulation, the following assumptions were given. 1.

CFD Simulation Ansys Fluent CFD software (R-14)was used to develop a simplified three-dimensional model of the bus passenger compartment.
· The simulations were run as steady employing pressure-based segregated solver with the SIMPLE, second order upwind discretization scheme and convergence criteria for all equations are 10-4 except for energy is 10-6[9]. 2.2 CFD validation and boundary condition CFD model was validated by comparing the air temperature obtained from the measured data.
Results and Discussions The CFD simulation results were analyzed at x-direction is 0.3 m, y-direction is 1.45 m and z-direction is 1.6 m as shown in Fig. 4(a).Fig. 4(b) shows the locations of data collection inside the bus passenger compartment.
Numerical Simulation of Pollutant Transport within an Vehicle Cabin.
Simulation of airflow and pollution levels caused by severe traffic jam in a road tunnel.

The Wind Flow Characteristics Measuring Simulations of Soundproof Tunnels on Expressways Jang-Youl You1,a, Sun-Young Paek2,b, Doo-Kie Kim3,c and Ki-Pyo You4,d* 1Department of Architecture Engineering Songwon University, Gwangju, Korea 2Department of Architecture Engineering Chonbuk National University, Jeonju, Korea 3Department of Civil and Environmental Engineering, Kunsan National University, Kunsan, Korea 4Department of Architecture Engineering Chonbuk National University, Jeonju, Long-Span Steel Frame System Research Center Korea(Corresponding Author) ayou1877@songwon.ac.kr, bmsdona@jbnu.ac.kr, ckim2kie@kunsan.ac.kr, d,*youkp@jbnu.ac.kr Keywords: Wind flow, Soundproof Tunnel, Expressway, Measuring Simulation, CFD Abstract.
CFD Analysis CFD analysis was conducted to examine the wind velocity changes in apartments around the soundproof tunnels to be constructed on expressways.
Table 1 shows the boundary conditions of the CFD analysis.
Boundary conditions for CFD analysis.
Figs. 4 and 5 show the CFD analysis results pre- and post-installation.

Modeling and Simulation Basic Modeling.
The flow line toward simulation and wind tunnel tests are basically the same.Table2 shows drag coefficient values calculated during simulation and wind tunnel test.
Combined the wind tunnel test and CFD analysis, some changes have been done to get better aerodynamic characteristic shape.
The results showed that: (1) The flow field information obtained by CFD simulation and test results can match well.
On comparisons between CFD methods and wind tunnel tests on a bluff body, SAE1999- 01 -0805 [3] Menter F R, Multiscale Model for Turbulent Flows.

Software CFD simulations which is used to obtain a picture of heat transfer and air flow behavior in double envelope.
Tests performed on the CFD program models in simpler and smaller volumes to anticipate the failures in the process of CFD simulation software due to the large volume of buildings on the actual buildings.
Simulation Results Before performing the CFD simulations program on the research building objects, first of all the simulation is conducted on a simpler model and a smaller volume to anticipate the failures in the process of CFD simulation software, due to the large volume of the actual building.
The use of CFD simulation program provides more efficient DSF performance.
By field measurements and CFD simulation, there is a correlation of wind effect with heat transfer onto the building.