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The drag reduction characteristic of air deflector of a heavy-duty vehicle is examined through CFD simulations and wind tunnel test in this paper.
The CFD model of the truck is built using the FLUENT software and the simulation results are compared with the wind tunnel test data to verify the accuracy of simulation model.
CFD Simulation of the Heavy-duty Vehicle Geometric Model of the Heavy-duty Vehicle A heavy-duty commercial vehicle made in China is selected in this research.
Fig.1 Three-dimensional view of the vehicle CFD Simulation Setup The three-dimensional flow field around the heavy-duty vehicle model was numerically simulated using Fluent 6.3, a commercial CFD software.
The error between the test and simulation is less than 5% and the CFD model of the vehicle is believable.

Experiment and Numerical Simulation on Slugging Fluidization of Large Particles in Gas-Solid Fluidized Bed Hui Yanga, Dongyu Wanb and Changqing Caoc College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, China aemai:yh821222@163.com, bemail:wawandongyu@163.com, cemail: ccqcdm@163.com Keywords: Gas-solid fluidized bed, Eulerian model, Slugging, CFD, Numerical Simulation Abstract.
One of the important numerical methods is CFD[1-3].
Simulation domain and grids The grid was created in a CAD program called GAMBIT and exported into simulation software Fluent6.3.
The CFD model did not include any kind of heat transfer.
These parameters are measured experimentally for different superficial gas velocities and compared with those predicted by CFD simulation.

Optimization of CFD meshing for stented vessel geometries Azadeh Lotfi1, a, Tracie J.
Hence, in this study, complex three-dimensional geometric CFD simulations of a stented vessel have been performed in order to adopt an efficient and optimal meshing method to reduce the high computational cost.
Fig.1 shows a Nitinol stent used for simulations.
Inflated Nitinol stent used for simulations.
Numerical simulations & boundary condition The Fluent 14.5 (Fluent Inc., Lebanon, NH) package was used for laminar steady-state fluid dynamic simulations.

The design of labyrinth channel, the CFD simulation method based on cylindrical channel prototype and the hydraulic performance experiment of the emitter are researched.
In this paper, the CFD simulation of the labyrinth channel was firstly carried out based on the planar model with inlet pressure of 100 kPa and outlet pressure of 0.
So it is necessary to carry on the CFD numerical simulation using the cylindrical labyrinth channel.
It showed that the velocity distribution in the labyrinth channel obtained from the experiment match and verified the CFD simulation in general.
It is proved that the CFD numerical simulation using cylindrical prototype of the labyrinth channel obtained more accurate result than that of using the planar model.

A computational fluid dynamics (CFD) model is used to investigate the droplet formation and deformation under the influence of different parameters.
Computational Model To better understand the flow behavior of droplet formation from jet breakup during the prilling process, a detailed computational fluid dynamics (CFD) simulation is performed using commercial software Fluent 14.0 (Ansys.
Fig. 5 Drop size with different inlet velocities Conclusion Based on the VOF method, CFD simulations of prilling droplet formations are obtained.
Witting, CFD analysis of fuel atomization, secondary droplet breakup and spray dispersion in the premix duct of a LPP combustor.
Alamdari, Simulation of urea prilling process: An industrial case study.

CFD.
Simulation.
Jia,CFD numerical simulation of Archimedes spiral inlet hydrocyclone.
Xu, On the Simulation ofHydrocyclonesusing CFD, The Canadian Journal of Chemical Engineering, 91(5), 950-958 (2012).DOI 10.1002/cjce.21705 [25] T.R.Vakamalla, K.
Mohanty, A 3-dimensional Eulerian–Eulerian CFD simulation of a hydrocyclone.

Model and Simulation on Flow and Pressure Characteristics of Axial Piston Pump for Seawater Desalination Jiang Zhaia, Hua Zhoub State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China ajiangzhai@sina.com, bhzhou@sfp.zju.edu.cn Keywords: Axial Piston Pump, Seawater Desalination, Model and Simulation, Cavitaion.
In this paper, with cavitation being considered, LP (Lumped Parameter) model and CFD (Computational Fluid Dynamics) model for pressure and flow characteristics of an axial piston pump for seawater desalination were created, and corresponding simulation results were compared and discussed.
Simulation parameters Both the numerical solution of the LP model and the CFD model need the geometry sizes of the pump parts, and the geometry information were acquired from corresponding structure sizes of the pump.
From the main simulation results of the two models, we can make a conclusion: 1) Both the two model can describe the main flow and pressure properties of the axial piston pump for seawater desalination. 2) Although CFD model is accurate and many details such as cavitation position can be acquired, it is costly for time and hardware. 3) LP model is a simplified model compared with CFD model.
Simulation on the Dynamic Pressure and Flow of the Seawater Desalination Axial Piston Pump.

Simulations have been developed in recent years, and CFD modeling is popularly used to simulate the hydrodynamic of fluidization regimes [1].
Method Simulation setup.
Particles size position of sewage sludge solid in Geldart particles classification graph Fig. 5 shows the position of particle size of sewage sludge used for CFD simulation in the Geldart graph.
CFD Modeling of Gas-Liquid-Solid Fluidized Bed.
Experimental study and CFD Simulation of a 2D Circulating Fluidized Bed.

To compare combined CFD-DEM model with CFD modeling, it was found that the combined CFD-DEM model performed adequately in predicting the particle velocity in fluidized bed and spouted bed [3, 6, 9] while the CFD modeling was still under predicted in the particle velocity and heat transfer rate.
To simplify the CFD-DEM model the following assumptions were determined.
From the simulation results revealed that the inlet area of 20% gave a good mixing.
Tanaka: Discrete Particle Simulation of Two-Dimensional Fluidized Bed, Powder Technology, Vol. 77 (1993), pp. 79-87
Horio: DEM Simulation of Fluidized Beds for Gas-Phase Olefin Polymerization, Chemical Engineering Science, Vol. 54 No. 24 (1999), pp. 5809-5821

Secondly, the CAD technology is applied to achieve parametric models of separator and the CFD technology is employed to fulfill fluid simulation of separator parametric models.
Then the meshing is carried out in the geometric models above and grid patterns according with CFD simulation requirements are formed.
By processing calculation data of CFD simulation results, the predicted index values of the separator with different design parameters are achieved.
And with CFD technology, the fluid simulation of separator design models is fulfilled.
Then the CFD simulation results are evaluated by data processing method of Fuzzy Synthetic Evaluation, so the optimal design model can be found.