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Analysis and Simulation of Air Flow Field Surrounding Grinding Wheel Chunyu Wang1, Lei Zhang1, 2, a and Chunfeng Yang1 1School of Mechanical Engineering, Shandong University, Jinan, China 2Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education asirzhanglei@sdu.edu.cn Keywords: Grinding; Air flow field; Stiff air layer; 3D air flow simulation Abstract.
Based on fluid dynamics and mathematical simulation method, the 3D finite element model of the air flow field around the grinding wheel is developed.
However, the air flow field with the axial direction of the grinding wheel was ignored due to the limitation of 2D simulation.
Simulation The grinding process was performed on a computerized numerical control grinding workbench and a vitrified aluminum oxide wheel was used.
The returning air flow also appeared in two-dimensional CFD simulation (Figure 7) because the physical model and boundary conditions in 2D simulation is based on the grinding with the damper, which is completely different with the tranditional grinding.

This research focuses on the mutual effects of the adjacent towers' performance, and also makes a comparison between the efficiency of the three cooling towers in windy and no-wind conditions, using Computational Fluid Dynamics (CFD).
Goodarzi & Keimanesh [7] in a research by using numerical simulation studied two other kinds of windbreakers.
There are different solutions methods in CFD, that finite volume method is used here.
There was a symmetry plane along the wind direction and only one half of the total domain was selected for numerical simulation.
According to symmetry of the geometry and the flow filed just one half of the geometry used for simulation.

Introduction With the quick development of computer technology and the computational fluid dynamics (CFD), the research of biological fluid dynamics improved rapidly, and the study of numerical simulation through CFD in hemodynamics becomes the mainstream gradually[1-4].
Fig.1 Artery blood model of the branched blood vessel and aortic arch Meshing of the Geometric Model The meshing of ANSYS is a crucial step in the numerical simulation analysis, which directly affects the accuracy of the subsequent numerical calculation and the calculated size.
Conclusions Fluid-Solid Interface (FSI), which combines ANSYS and CFX, is used to establish the three-dimensional model of the branch artery and make the fluid-structure interaction simulations of the model, obtaining the Von Mises Stress of the wall of one cardiac cycle, and the deformation of it.
Finite Element Simulation of Blood Flow in the Cerebral Artery[J].
Computational Analyses and Simulations of Fluid-Structure Interactions Applied to Stented Abdominal Aortic Aneurysms[D].

Li[3] shows that the wind is particular spatial ambient flow by CFD simulation.
Zhang and Liu[4] analyses strong mean wind velocity and direction, by one-year field measured data and CFD.

In the process of numerical simulation in the furnace, the gas phase turbulent flow usesRealizable model for both sides and solves the governing equations using SIMPLEC algorithm.
With the development of the computer, the numerical simulation method in boiler design and operation and reform plays a more and more important role.
Numerical simulation can serve as a good auxiliary method, both reducing the number of laboratory experiments and saving a lot of manpower material resources, and can be calculated on a computer screen image reproduction[1].
High quality of the solution of the grid to the flow field can be realized with high quality, the research achievements of CFD can be used in the industrial design.
Simulation results basically accord with the four tangential boiler combustion rule.

To reveal the mechanism, steady numerical simulations were performed using FINE/TURBO software package.
The first grid spacing ensure y+<10 at the walls, which makes the boundary layer simulation reliable.
The numerical simulations were performed by solving the steady compressible Navier-Stokes equation using the FINE/TURBO software package.
Michael, in: Numerical simulations of rotor 35 with and without tip injection using an arbitrary mach number flow solver.
[12] ASME Turbomachinery Committee, CFD Code Assessment in Turbomachinery – Data Report, (1994)

The CFD software FLUENT was used as the foundation to develop the numerical wave flume, in which the governing equations are the Reynolds-averaged Navier-Stokes (RANS) equations and the standard k~ε turbulence model.
In the paper, CFD software FLUENT is used as the foundation to develop the numerical wave flume.
Numerical simulation of progressive wave and standing wave was carried out to cheek if the module works well.
Numerical Simulation of Wave Impact on the Slab.

The new design was simulated in CFD for tolerating stresses.
Fig. 5; Deformation simulation Fig.6; Shear stress simulation Prediction of new design In another paper a variable intake Cam profile was tested and found to be promising for SI engines with single overhead as it has reduced CO and HC emissions at high speed also the brake torque, volumetric efficiency were improved through all engine speeds. [12] Fig.7; Expected engine speed- torque curve for new Cam design The new design giving Cams various heights that can be controlled hydraulically based on the speed and load of the engine.
The design has been simulated by CFD for the stresses and tear and found to be withstanding the rotations and modification.

The standard κ­ε turbulence model as a simplified computational fluid dynamics model is used to provide moderately fast simulations of turbulent airflow in an urban environment.
CFD model simulation is an important method to study the urban wind field and the pollutant concentration field.
RANS model is the most commonly used model for simulation of urban flow field and concentration field.
The simulations of turbulent air flow and pollutant dispersion were based on the steady-state Reynolds-Averaged Navier-Stokes equations (RANS) and the standard κ­ε turbulence model (Santiago, 2010).
[6] Flaherty, J.E., Stock, D., Lamb, B.: Computational fluid dynamic simulations of plume dispersion in urban Oklahoma City.

The calculation workload for performance simulation of a whole radiator is too huge due to its size.
The all 23 experiments were carried out by numerical simulation method.
CFD software Fluent was used to solve control equations and boundary condition equations. 2.2 simulation results Numerical simulations were carried out to obtain thermal-hydraulic performances of the 23 heat transfer units.
Simultaneously, ideal state was used in simulation and the fin burrs and lodgings were not considered in simulation.
So, this simulation method can be used to investigate the micro effect mechanism.