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Study on the downburst field characteristics under the influence of two-dimensional continuous mountains at different distance Yi Sun1, a, Yuanze Wu1, Haitao Shi1, Baifeng Ji2 1 School of Civil Engineering and Architecture, Wuhan University of Technology Wuhan, China, 430070 2 Hubei Key Laboratory of Roadway Bridge &Structure Engineering, Wuhan University of Technology Wuhan, China, 430070 a274118038@qq.com Keywords: downburst; wind field characteristics; continuous mountains; CFD numerical simulation; Abstract.
In this thesis, the changes of the wind field characteristics under the influence of continuous mountains at different distance after the downburst happened are studied by CFD numerical simulation.
And CFD method using commercial software FLUENT can effectively simulates the whole process of the downburst field characteristics under the influence of two-dimensional continuous mountains at different distance.
Numerical Simulations of an Isolated Microburst.
Downburst simulations experimental and numerical challenges[C].Proceedings of the 2004 Structures Congress 2Building on the Past: Securing the Future, 2004: 1657 – 1664 [7] Mason M. physical simulation of thunderstorm downbursts [D].Masters thesis, Lubbock (TX, USA): Texas Tech Unversiity, 2003.

Viscous flows around NASA CRM wing-body-tail configuration were simulated by an in-house CFD solver called Exstream.
Common challenges are complex flow simulation (such as pressure gradients, laminar/turbulent transition regions, separated and possible unsteady flow) by Computational Fluid Dynamics (CFD) and mesh generation for topologically complex configurations by grid methods (e.g., Refs. [1, 2]).
As mentioned earlier, AUSMDV, k-ω SST turbulence model and LU-SGS have been used for this simulation.
Summary Viscous flows around NASA CRM wing-body-tail configuration has been simulated by an in-house CFD solver called Exstream.
Summary of the First AIAA CFD High-Lift Prediction Workshop.

In order to investigate natural cross-ventilation in buildings driven by combined wind and thermal buoyancy forces, computational fluid dynamics (CFD) with the DES model is applied.
This paper applies the CFD method to study cross-ventilation driven by wind and buoyancy forces.
Simulation Setup Building Models.
Numerical simulations were performed by the CFD code FLUENTTM 6.3.
Conclusions To study cross-ventilation driven by combined wind and buoyancy forces, CFD simulations with the DES model were applied in this paper.

Air-assisted boom sprayer model is developed based on CFD.
Simulation of 3D model shown in Figure 1.
Simulation Test and the Simulation Results In order to improve the calculation efficiency, selecting one of 16 nozzles as analysis object.
Simulation analysis on characteristics of droplet deposition base on CFD discrete phase model[J].Transactions of the CSAE, 2012,28(6):13-19
CFD prototyping of an air assisted orchard sprayer aimed at drift reduction [J].

Numerical Exploration on HCCI Combustion Characteristics under NVO Strategy Yinhan Gao 1, a,Defu Wang2,b ,Peng Cheng 1, c, Hua LI1, Youkun Wang1 1 State Key Laboratory of Automobile Simulation and Control, Jilin University, Changchun 130022, China 2 College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130022, China ayinhan@jlu.edu.cn, bdfwang11@mails.jlu.edu.cn, cchengpeng@jlu.edu.cn Keywords: Homogeneous charge compression Ignition, CFD simulation, Negative valve overlap, Combustion characteristics Abstract.
A 3-dimensional CFD HCCI model has been established using STAR-CD code for combustion characteristics studies under negative valve overlap (NVO) strategy via an early closure of exhaust valve.
Simulation results were in good agreement with the available experimental data.
The objective of this paper is to simulate HCCI engine combustion using 3-dimensional CFD model under NVO strategy.
Assanis,A Four-Stroke Homogeneous Charge Compression Ignition Engine Simulation for Combustion and Performance Studies.

CFD is widely used in the jet impingement cooling and lubrication.
CFD simulation model The cryogenic MQL cold air jet machine consists of drying equipment, refrigeration equipment, insulating pipe and two nozzles.
The comparison between simulation and experimental data was shown as Fig. 4.
So the CFD simulation model is available.
The velocity values calculated from the simulation results are shown in Table 2.

Numerical Simulation of Two-dimensional Turbulent in T-tube tee about Two Kinds of Angle XIONG Moyou, TANG Zhonghua The Civil and Architecture School of Southwest University of Science and Technology, Mianyang 621010,China xmy19870102@126.com,tangzhonghua126@.com Key words: T –tube, numerical simulation, turbulent, flow field Abstract.
However we can get the various flow parameters vividly and visually, by numerical simulation of the inner flow field of the T-tube tee tube with the software of the computational fluid dynamics (CFD). 1 The control equations The T-tube tee flow condition is complex, a fluid flowing into tube and outflow into two branches.
Fig.1 The geometric dimensioning of two kinds of T-tube tee Fig.2 The triangular grid of the two kinds of T-tube tee 3 Numerical simulation and analysis of the results 3.1 Numerical simulation conditions Simulate air which in the central air conditioning system flow condition in two different kinds of T-tube tee by the way of the software of the computational fluid dynamics (CFD).Using the method of Separation implicit, convective term of the control equations discrete format is first-order windward format, considering direction of fluid, at the same time, first-order format is enough for the longitude demand here, this is why choose first-order windward format.
Computational fluid dynamics (CFD software theory and application [M].
Based on the software FLUENT t-shape tee turbulent numerical simulation [J]. journal of chemical equipment technology, 2008 (4) : 33-36

Key words: Inkjet; CFD; Equipment; Hydrokinetics Abstract.
According to the analysis of theoretical calculation and CFD, we designed a new type of equipment for supplying ink, including the structure of the transition pipe.
The computer simulation of the ink flowing in the pressure automatic adjustment equipment The software and mathematical model of the computer simulation.
In the FLUENT software, as long as given with the physical properties of the fluid simulation, mathematical models, algorithms and the corresponding initial conditions, the simulation software would simulate the flow patterns of the fluid, furthermore, the numerical results were calculated and shown by the graphical visualization [6, 7].
Figure 1 The structural design of the supplying ink equipment The computer simulation results.

Hydrodynamic Study of the Water/Oil Separation Process in a Hydrocyclone: Modeling and Simulation H.L.
The physical problem treated herein is related in predicting water and oil two-phase flow in hydrocyclone by CFD.
Table 2 - Geometrical and termo-physical parameters of the phases used in the simulations.
Hashemabadi, CFD analysis of inlet chamber body profile effects onde-oiling hydrocyclone efficiency.
Numerical simulation of industrial hydrocyclones performance: Role ofturbulence modeling.

The simulation result showed that this method can satisfy the requirement of precision and provide reference for the analysis of the flow field which had the established relationship between structural parameters and laminar flow within it.
CFD software based on Finite Element Analysis is commonly used to analyze such flow field.
CFD geometry with multi-plate, simplified CFD geometry and their meshing graphs The setup in ANSYS® FLUENT® is as following: laminar model, density is 998.2kg/m3, viscosity is 0.001003kg/m –s, velocity magnitude of inlet is 0.000381m/s.
The results of simulation showed that the range of errors was small enough between two solutions, and it can meet the requirements of practical application.
This simplified method provided alternate means for some CFD research field that could be analyzed indirectly.