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The Simulation Study on 3D Gas Flow Field and Structure Improvement with Tower Continuous Vacuum Dryer Zhijun Zhanga, Shiwei Zhangb, Chenghai Xuc School of Mechanical Engineering and Automation, Northeastern University, Shenyang110004, China a zhjzhang@mail.neu.edu.cn, bshwzhang@mail.neu.edu.cn, cxch1940@126.com Keywords: Tower continuous vacuum drying, Gas flow field, Structure improvement, CFD Abstract: The 3D gas flow field, including the gas pressure and gas velocity was studied by computer fluid dynamics simulation (CFD).
In order to illuminate the flowing characteristic of gas, the computer simulation is a useful method except for experimental research.
The Computational fluid dynamics (CFD) is a powerful tool to study the flow field of drying room.
Simulation of the hydrodynamics and drying in a spouted bed dryer, Drying Technology,2007,25:59-74 [4] ZHONG Siqing, CHEN Qingling, and CHEN Zhiqiang.
Turbulence Modeling for CFD.

Numerical simulation of flow field and flow noise was carried out on SUBOFF with Lighthill acoustical analogy and large eddy simulation method.
Numerical simulation of flow field and flow noise was carried out on SUBOFF with Lighthill acoustical analogy and large eddy simulation method.
Table1 Drag Force for SOBOFF v[m/s] CFD [N] Experiment [N] Relative Error% 3.048 106.07 102.3 3.69 The simulation results of flow field are relatively accurate which can be seen from above.
It also shows that the CFD results agreed well with the experimental results.The result of flow noise is shown in Fig.1.
Through the numerical simulation of flow field and flow noise for 6 kinds of model in different angle of attack, we can draw the following conclusions. 1) CFD method was used in the simulation of characteristics of flow field.

In this paper, numerical and physical simulation methods were employed to verify mutually and analyze the hydraulic characteristics in a tangential vortex dropshaft.
As an assistant tool, the simulation results of CFD software (e.g., Fluent, CFX) had some shortcomings as well.
So, that is certainly a reasonable approach that the results of numerical simulation was compared and verified with hydraulic scale model.
A fully three-dimensional and steady-state CFD analysis was conducted using the commercial solver FLUENT™{TTP}8482 .
Q=2.0 m3/s Fig. 8 Comparison of total pressure calculated by CFD and physical model(Z=0) Conclusions The hydraulics of tangential vortex dropshaft was studied through numerical and physical simulation methods.

Computer simulations of the VB method could be an effective tool to optimize the growth process and reduce the production costs.
The computer simulations of the growing process could be an effective method to reduce the costs of the experiment and search the best parameters.
The 2D CFD models are reported in CaF2 and CdTe material systems performed on the VB method and the melt is enclosed in rigid walls having the corresponding temperature profiles with the enthalpy-porosity based approach [9].
However, the numerical simulations have not yet been applied to the growth of PbI2 single crystals with VB method.
Based on the numerical results, the experiment of PbI2 crystal growth with VB method was also carried out to verify simulation parameters.

And the method of CFD simulation and theory will be a reference for relevant research.
With the developing of CFD software, nowadays we can do researches and analysis in virtual.
Therefore, in commen CFD engineering software, the reynolds stress model is always simplified such as two equations model.
Simulation Calculation Establishing 3D model.
So, Hex gird does much better accuricy in both delivering vector load and fluid simulation.

Internal Flow Analysis of SCR-Exhaust Aftertreatment System Lin-lin REN1,Wei DING1,Zhe ZHANG1,a,Tao CHEN2,Ming-xin BI2, Ying-chao ZHANG1 1State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun China 2Faw Jiefang Automotive Company, LTD, Changchun China aCorresponding author zhangzhejlu@jlu.edu.cn Keyword: SCR-Exhaust aftertreatment system; carrier; CFD; gas flow uniformity Abstract: Selective Catalytic Reduction system (SCR) has made great contributions to diesel engine NOx control technology.
In this paper, CFD technology was used to simulate the internal flow field, and analyze the gas flow uniformity, which would give us reasonable suggestions to optimize the structure of SCR-Exhaust aftertreatment system.
According to the needs of simulation, one CAD software was used to process the geometric models by keeping the inner surfaces.
Inner structure of models Simulation Schemes We set up two research schemes to thoroughly study the SCR’s internal flow mechanism.
On the whole, CFD technology is vivid and intuitive to simulate the internal flow field, which make the optimization of SCR system more targeted and reduce the improvement cost.

., Jeongja 27 Bundang Seongnam Gyeonggi 463-957, Korea a cdyim03@kmail.kimm.re.kr, bbsyou@kmail.kimm.re.kr, cjelee@expresslab.co.kr Keywords: Magnesium alloy, Horizontal continuous casting, Solidification behavior, Simulation Abstract.
The solidification behavior of AZ31 magnesium alloy plate during horizontal continuous casting (HCC) with constant velocity was analyzed by three-dimensional CFD simulation.
Recently computer-aided simulation is applied actively to evaluate the effect of processing variables on quality of product and to optimize the processing condition.
In this study, the solidification behavior of AZ31 magnesium alloy plate during horizontal continuous casting was analyzed as a function of processing variables by CFD simulation technique.
Simulation Procedure A commercial CFD package (Fluent) was used for simulation of solidification behavior during horizontal continuous casting.

The objective of this paper is to evaluate, through Computational Fluid Dynamics (CFD), the potential to reduce the internal temperature of a building located in the city of Rio de Janeiro, Brazil.
The temperatures of the bottom sides of the roof were obtained in loco in the analyzed residence and in a residence with similar characteristics, but without the GR, and constituted the input data for a Computational Fluid Dynamics (CFD) simulation, in order to obtain the average temperature difference between the internal and external environments of the buildings.
This information constituted the input data for the CFD simulation, carried out in Solidworks software, to obtain the average temperature difference between the internal and external environments of the buildings.
CFD simulation analyzes the thermodynamic parameters of a fluidic system and can be used to assess diffusion and convection in the environment, the aerodynamics of complex parts and designs, and temperature, pressure, and velocity in the fluid flow, both in laminar and turbulent regimes.
Although CFD models can effectively provide reliable results, they have limitations regarding the adaptations of the actual physical model to the boundary conditions entered in the program.

Along with flying development of computer and increasingly ripe of CFD software, the result got from computer simulation can replace the test result from high cost test at a certain extent[2].
Therefore by using CFD software, three models of two-dimensional trajectory corrector projectile in mortar with same canards and different fins are carried out aerodynamic simulation.
Simulation of External Trajectory of Rockets.
Computer Simulation, Vol.6(2003), p. 17
Aerodynamic Simulation Methods of Anti-tank Missile.

Coupling model of CFD/FE/BE.
In this paper, CFD, FEM and BEM with RIA are coupled to solve above problem.
In order to simulate the propeller fluctuated thrust and torque, a CFD tool is adopted.
Thirdly, as the inflow and balanced rotation speed of the propeller is known, the propeller is transit analysed with large eddy simulation (LES) and the propeller fluctuated thrust and torque in time domain is abstracted and transformed to frequency domain.
Fig. 1 Submarine CFD/FE/BE model.