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Using CFD Method to Simulate Respiratory Aerosols Transportation in Ventilated Built Environment Guohui Feng 1, a Yi Zhang 1, b Xinying Lan 1, c 1 Shenyang Jianzhu University College of Municipal and Environmental Engineering Shenyang, China a fengguohui888@163.com, b sjzu_zy@163.com, c Lanxinying1977@sohu.com Keywords: respiratory aerosols, droplet nuclei, ventilation, CFD simulation Abstract.
Method Some keywords such as respiratory aerosols, ventilation, CFD simulation, airflow, airborne transportation, droplet, droplet nuclei and respiratory were performed limiting the search to title or abstract of papers on residential and non-industrial commercial building.
We cannot realize the simulation on the human model of casually walking.
The data such as the aerosols’ initial velocity, total mass and the number of droplet nuclei generally accessed from experiment in CFD simulation.
Particle model Generally, there are two approaches of modeling particle transport in computational fluid dynamics (CFD) simulations: the Lagrangian method and the Eulerian method.

Methods The method used in this study was simulation with ANSYS computational fluid dynamic tool.
Fig. 1 Variations in Stirring Patterns (RUN 1, 2, 3, 4) The CFD simulation process through three stages: preprocessing, solving/solution, postprocessing.
Postprocessing is the final step in the CFD analysis.
At this step, the organizing and interpreting of the data from the CFD simulation results in the form of images and curves are implemented.
Molecular Dynamics Simulation.

Wuxi 214000, China azhaoliwei33@126.com, b YING.KING@hotmail.com Keywords: filter element, filtration Resistance, numerical simulation, CFD, flow field analysis Abstract.
CFD numerical Simulation Experiment With the limitation to the experimental conditions for studying the pressure loss of filter elements and increasing reliability of the computational fluid mechanics (CFD), more and more evidence for the practicability of CFD in the area of flow field is brought up [12].
Therefore, we can conduct simulate numerically the flow field of a filter element by means of the FLUENT of CFD software, conduct simulation experiments aiming at the flow field of a filter element, and verify the reliability of such theories according to the results of simulation experiments.
(4) Ignoring the effect of gravity. 4.1 Simulation calculation The model can be divided into 72134 grids, the detailed structural parameters and flow attribute of which are as shown in Article 2.1.
Numerical Simulation Study of Multi-pipe High Efficiency Air Filters.Shanghang: Donghua University, 2006.

CFD Abstract.
A novel impeller hydrocyclone is designed to solve this problem, and the influences of impeller on inner fluid flow rate have been discussed by simulating fluid flow patterns using a common CFD software, FLUENT.
In this paper, a novel impeller type cyclone accelerator has been developed, and the influence of this new model on fluid flow is studied in detail by using a common CFD software, FLUENT.
Fluid Dynamics Simulation The separation performance of novel hydrocyclone with rotating impeller and conventional hydrocyclone are analyzed by using a common simulation software, FLUENT, and the velocities of impeller area are compared and discussed based on the same volumetric feed rate and hydrocyclone size.
[3] Li Pengfei, Xu Minyi, Proficient in CFD simulation and actual cases, China post and press.

The effectiveness of adaptive press casting is demonstrated by using CFD model simulations.
As a final step in this study, we used CFD simulations to check the control performance using the obtained multi-step pressing velocity without a trial-and-error process.
The control performance using the switching velocity of Eq. 2 designed by the proposed simple model was reasonably validated by CFD simulation as shown in Fig. 6.
The simulation results of a simple model such that λ(Τend) is given as a constant value by fitting almost explains the results of the CFD model.
Finally, the obtained velocity reference's ability to control pressure fluctuation and to realize short cycle time was validated by the CFD simulations.

Numerical Simulation of The Aerodynamics and Aerothermal Heating for A Hypersonic Vehicle LIU Haiyonga, Qiang Hongfub 201 Section ,Xi’an High-Tech Institute,Xi’an, China ahelian_xicheng@163.com, bQiang@263.net Keywords:Numerical simulation; Waverider; Pre-compressed surface; CFD software; Viscous model Abstract.
Numerical simulation was conducted on the two-dimensional and three-dimensional models of the vehicle using CFD software of Gambit and Fluent.
The results of simulation investigation showed that: High compressed air was constrained beneath the pre-compressed surface of the forebody.
That would be helpful to optimize the design of the hypersonic vehicle, extent the understanding of the CFD software, and improve and modify the turbulence models for suitable utilization in the simulation of hypersonic flow.
The present viscous model was suitable for aerodynamic simulation and needed be modified and improved for aerothermal heating calculation.

The simulation results are verified through ground or field tests in the end.
CFD Analysis and Flow Control Precision CFD has been developed on the basis of the fluid dynamics theory and numerical simulation techniques.
Numerical simulation shows that the most serious particle impact erosion occurs at the pressure reducing valve port, some simulation results are presented in Table 2.
So the CFD method can make up for the bond-graph method in analyzing the influence of the local flow field.
Broenink: Simulation Practice and Theory, Vol.7 (1999), pp.481-492

Results of the mixture simulation is compared with the results obtain from simulation of pure H2 release.
CFD tools have the potential to model the relevant physics and predict the effect of certain incident [9].
Hence, CFD-FLUENT is used in the present study for the simulation and standard k-ε turbulence model with the aid of species transport model [10] is applied.
Simulation of the escaped gas is carried out with CFD code FLUENT.
Velocity magnitude of syngas mixture Results of the simulation for mixture are compared with the pure release simulation.

CFD Study of Wake Interaction of Two Wind Turbines Zixi Chen1, a, Neha Marathe1,b and Siva Parameswaran1,c 1Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas, 79415, USA azixi.chen@ttu.edu, bneha.marathe@ttu.edu, csiva.parameswaran@ttu.edu Keywords: wind energy, wind turbine, wake interaction, CFD, virtual blade model.
Computational Fluid Dynamics (CFD) simulations are carried out to represent the velocity deficit behind two turbines in-line with the wind using the Virtual Blade Model (VBM).
VBM is an implementation of the Blade Element Method (BEM) within the commercial CFD code ANSYS FLUENT.
Results In the following, results obtained from simulations using VBM are presented.
Basically the simulation result is in good agreement with the wind tunnel data.

CFD simulation is a useful tool for studying.
Computational fluid dynamics (CFD) has been applied to push-pull ventilation systems [2, 3].
In CFD simulation, in many situations the geometry domain is not the same with the calculation Domain.
Boundary condition is also one of the most important steps in CFD simulation.
Fig. 10 Comparisons between case2, case4 and case5 (pull velocity 1.0m/s and 0.5m/s) Conclusion CFD simulation is a very useful tool for studying.