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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.

Coupled CFD/GNC Modeling for the Basic Finner Projectile with Closed Loop Ke Xi a, Chao Yanb, Yu Huangc and Wen Wangd Beihang University, Beijing, China acauchy86@163.com, byanchao@buaa.edu.cn, chuangyu@ase.buaa.edu.cn, dwangwenbuaa@126.com Keywords: CFD, PID, Basic Finner, virtual flight simulation Abstract.
CFD based virtual flight test (VFT) is such a technology which integrates multidisciplinary design method.
A virtual flight simulation platform has been developed by integrating multidisciplinary design technologies such as CFD, RBD and GNC.
Prediction of the unsteady behavior of maneuvering aircraft by CFD aerodynamic, flight-mechanic and aeroelastic coupling.
Relative motion simulations using an overset multimesh paradigm with Kestrel v3.

Numerical Simulation of Heat Transfer Characteristics for Two Metallic TPS Structures Haiyong Liu1,a , Hongfu Qiang2,b 1201 Section , Xi’an High-Tech Institute, Xi’an, China 2201 Section , Xi’an High-Tech Institute, Xi’an, China ahelian_xicheng@163.com, bQiang@263.net Keywords: Numerical simulation; Heat transfer characteristics; TPS; CFD software; Heat conductivity.
Numerical simulations were conducted on the three-dimensional TPS models using CFD software of Gambit and Fluent.
The results of simulation investigation showed that: The metallic layer had poor capability to restrict the heat conductivity.
That would be helpful to optimize the design of the TPS, extent the understanding of the CFD software, and improve and modify the heat transfer models for suitable utilization in the simulation under extremely high temperature.
This could be validated in further simulation with taking thermal radiation effect into consideration.

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.

The study validated 3D CFD simulation technology for the small cold store.
CFD simulation approach The physical model in this article was a small store whose size was ( 4. 5 m ( l)×3. 3 m (w )×2. 5 m (h) ).
CFD simulation The cold store model was built in Gambit2.2.30 and the steady air flow computation was finished in Fluent6.2.16.
Effect of design parameters on flow and temperature fields of a cold store by CFD simulation[J].
CFD simulation of effects of operating parameters and product on heat transfer and moisture loss in the stack of bagged potatoes[J].

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.

High Speed Photography and 3-D CFD Simulation of Pulsed Anti-riots Water Cannon Launch Process Yunhui Ao Department of Military traffic and Transportation, Engineering University of Armed Police Force of China, Xi’an, 710086, China ayh6221205@yahoo.com.cn Keywords: pulsed anti-riots water cannon, high speed photography, CFD simulation, second spray, first atomization.
Federico Montanariet [1] used the turbulence model of CFD software, gives a numerical study on piston-driven water cannon to analyze the movement of the piston.
The three-dimensional CFD simulation in the process of the Pulsed Anti-riots Water Cannon 2.1 Computational model and parameter settings Numerical simulation of turbulence includes Directed Numerical Simulation(DNS), Reynolds-average Navier-Stokes(RANS) and Large Eddy simulation(LES ) [8].
References [1] Federico Montanarietal: Exploratory CFD Analyses of the Fluid Dynamics of a Water Cannon.
[9] Xi Yu, Hongyuan Wei: Large Eddy Simulation for Large Eddy Simulation of Horizontal Pipe.

The pump performance curves are predicted based on the flow simulation, showing that efficiency rises up while the pump outlet is set at the backward stages.
Finally, CFD results are verified by comparing predicted performance curves with the experimental ones.
Fig. 1 CFD domain and tetrahedron mesh Solver and discrete scheme for governing equation.
Predictied curves, as shown in Fig. 5, are compared with test ones in order to verify valid and accurency of simulation.
(a) Head (b) Efficiency Fig. 5 Comparison between prediction and test performance curves Conclusions According to the flow field and pump performance by CFD simulation, the efficiency of multi-stage centrifugal pump drops down while the pump outlet moves to the foreward stages.

CFD (computational fluid dynamics) is a good method for simulation of the oil-gas separator.
But the quantified analysis on separation efficiency is difficultly brought forward by CFD.
But the simulation can only be used to the evaluation of results, optimization parameters are unable to be brought out.
CFD Model and Response Surface Design for Oil-Gas Seprator A.
Then, the result of separation efficiency was 76% by CFD numerical simulation; the result of RSM approached the result of CFD.

Results of CFD method match well with the engineering estimations, which provide a reliable and practical numerical simulation method for hydrodynamic characteristics simulation of UUVs in the future.
Simulation Method The authors have demonstrated that a computational fluid dynamics (CFD) technique can be a useful tool to estimate the hydrodynamic forces acting on the underwater glider.
And the grid quality will have an impact on feasibility, convergence and accuracy of numerical simulation directly.
Conclusions are as follows: (1) As demonstrated by results from CFD calculations compared with the engineering estimates, CFD methods can forecast the hydrodynamic characteristics of underwater gliding UUV more accurately.
CFD numerical simulation method enables detailed visualization of the flow field, including velocity and pressure distribution.