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Keywords: large-scale industrial workshop; CFD; orthogonal experiment; natural ventilation Abstract: In this paper, we used orthogonal experiment method and Computational Fluid Dynamics (CFD) technology to simulate the thermal environment of the iron and steel workshop.
With rapid development of computer hardware and numerical simulation technology, more and more attention is paid to the natural ventilation numerical simulation and analysis of buildings, and many valuable conclusions have been obtained [1-3].
All models were imported to ANSYS ICEM CFD to generate mesh, with structured mesh generation method, that is, all meshes are hexahedral.
The computational domain of numerical simulation was set as Air Ideal Gas fluid domain, and the impact of buoyancy was taken into account.
Liu, et al.: Numerical Simulation of Natural Ventilation in Large-Scale Industrial Workshops Based on Orthogonal Test Design.

Simulation for the Interior Natural Ventilation Condition of the United Habitation in Marseilles Tongyu Zhang a, Xiaotian Zhu b and Yuhang Shangc School of Mechanics & Civil Engineering ,China University of Mining and Technology, Xuzhou, Jiangsu, 221008,China aTongyu_zhang@126.com, bzxt@cumt.edu.cn, cyuhang11_21@sina.com Key words: Middle corridor type dwelling; The United Habitation in Marseilles; Cross ventilation; Natural ventilation; CFD Abstract: The United Habitation in Marseilles is the master wok of Le Corbusier, the well-know architect.
Simulating energy-saving designs using CFD software, has great significance in data support and comparisons between alternative programs.
We will use CFD software to simulate the indoor natural ventilation situations of the middle corridor type dwelling, ‘upper E’ apartment and ‘lower E’ apartment respectively, in the following passage.
The simulations of the working conditions are shown as follows Fig.16.and Fig.17.
Upon validation with analytical and empirical results, the CFD model is very sensitive to how the boundary conditions are set up and is an appropriate tool for natural ventilation design and research.

And then CFD is selected and accepted gradually to be a timely way to study complicated lubrication problems.
The meshes used in the simulations are structured and uniform, and the structural meshes near the boundary of various computing models get refined by the method of adaptive mesh refinement algorithm to improve the computational accuracy.
The surfaces throughout the simulations were assumed to be rigid.
Results and Discussion The results of the numerical simulations for various micro structures of grooves are performed.
However, the numerical results of CFD approach based on N-S equations should be examined by engineering experiments deeply.

CFD methods of turbulence are Direct Numerical Simulation (DNS), Large Eddy Simulation (LES) and Reynolds time average equation method.
The later two are Indirect Numerical Simulation.
The method will become a trend in CFD modeling for stirred reactor with the increase of computer performance.
Parallel computing CFD computation needs high speed and large capacity CPU.
CFD study of mixing process in stirred tank [J].

And the result was compared with that of existing experiment to find a reasonable method for the simulation of the flow field inside the cyclone.
In this article, the flow field inside tangential inlet cyclone separator is simulated by CFD method, and the result is compared with that of experiment to find a reasonable method for the simulation of flow field inside the cyclone.
This CFD simulation first bases on standard k-ε model and tries to find an optimal combination, so there are 5 factors need to be considered, including 1 two-level factor and 4 three-level factors.
Numerical simulation study of gas-solid two-phase movement within cyclone Separator.
Wang.Computational fluid dynamics analysis-Principle and application of CFD software.

Abstract：This paper describes the hydrodynamic performance prediction of ship hull with propeller by using CFD techniques.
Introduction Due to the rapid advances in computer power, different CFD methods are increasingly applied to simulate the full model including ship hull with propeller, and investigate the flow features for various states.
Conclusions Based on the CFD technology, this paper discussed the hydrodynamic performance prediction for KRISO container ship using different turbulence models.
As a result, the CFD method was verified, and the computational results were validated.
Simulation of Propeller-Hull Interaction using an integrated VLM/RANSE Solver modeling.

Simulation of Friction Stir Processing with internally cooled tool A.N.
In this work, friction stir processing of AZ31B Mg with an internally cooled FSP tool is simulated by a three-dimensional CFD model.
Theory CFD multi-physics finite volume-based software STAR-CCM+ was used in the simulation.
However, the stresses generated in the tool domain are not estimated in this work as it is completely based on CFD method.
(b) internally cooled tool Summary and conclusions In this work, FSP with internally cooled tool was modeled using CFD analysis.

Rezende [5] reviewed through CFD a turbulent separation bubble on a tilted thin flat plate.
Due to its simplicity it has been widely used for CFD calculations.
The mesh was generated through the ICEM CFD software.
Simulation of a turbulent separation bubble using RANS. 2012. 95f.
Proceedings of the 21st Conference of the CFD Society of Canada, Sherbrooke, QC, Canada, May 2013.

Research On The Effect Of Natural Ventilation On Buses In Summer Based On CFD Numerical Simulation Method Bao LIN 1, a, Xueting WANG 1,a and Xiao HU 2,a 1Department of municipal and environmental engineering, Shenyang Jianzhu University, Shenyang, Liaoning, China,110168 2China Resources Gas Group Ltd, Jinan, Shandong, China axuew.ting@hotmail.com Keywords: city buses; natural ventilation; vehicle velocity; roof openings; interior thermal comfort; the whole-domain approach Abstract.
Based on CFD numerical simulation, with a whole-domain approach, this paper predicts air flow and thermal comfort in naturally ventilated bus.
This paper, with the help of CFD simulation software, simulates the bus interior temperature and velocity under different vehicle velocity and open condition of roof openings.
Table 1 Simulation cases Outdoor air temperature[˚C] Vehicle velocity [km/h] The state of bus roof openings Side window Case1 31 45 close Maximum open Case2 31 45 open Case3 31 25 close Case4 31 25 open Results of the Simulation and Analysis Thermal Environment in different parts of the bus.
This part focuses on the simulation results based on different open condition of roof openings.

Gas-liquid hydrodynamics was estimated based on CFD results.
The simulation results have been compared and analyzed by isosurfaces, volume fractions, velocity graphs, torques and flow analysis calculations.
Within CFD model, both indexes and shear rate range were used to define the xanthan broth properties.
The gas bubble distribution obtained from MUSIG simulation is shown in Fig. 5 contour plots.
V Ranade, “CFD Simulation of Gas-Liquid Flows in a Reactor Stirred by Dual Rushton Turbines,” Int.