Search results

Large Eddy Simulation of Wind Loads on a Low-Rise Structure and Comparison with Wind Tunnel Results Isam Janajreh1,a, and Emil Simiu2,b 1Masdar Institute of Science and Technology, Abu Dhabi, United Arab Emirates 2National Institute of Standard and Technology, Gaithersburg, USA aijanajreh@masdar.ac.ae, bemil.simiu@nist.gov Keywords: Aerodynamics, Computational Fluid Dynamics (CFD), Large Eddy Simulation, Wind Engineering Abstract.
The estimates were obtained by large eddy simulation (LES).
Direct Numerical Simulation (DNS) and Large Eddy Simulations (LES) are alternatives, albeit costly, to RANS that can model satisfactorily the low frequency scales.
Governing System and Turbulent Modeling via Large Eddy Simulation.
This work suggests the potential feasibility of CFD utilizing Large Eddy Simulation to simulate pressure time histories obtained by wind tunnel measurements.

Physical and mathematical model are established on the basis of standard kitchen, and flow field characteristics(FFC) of the exhaust hood(EH) is simulated by CFD.
In the working condition, numerical simulation of EH flow field shows its good control effect, and the simulation helps design exhaust system[1].
CFD simulation model of the kitchen(long×width×height is 4×5×3.5m), is established on the basis of standard kitchen considered the layout diversity of restaurant kitchen.
The Numerical Simulation of Kitchen Ventilation[J].
Numerical Simulation of IAQ under Up-suction Exhaust Hood in Commercial Kitchen[J].

Numerical simulations are ideally suited to study these complex immiscible interfacial flows and provide an insight into the process that is difficult by experiments.
The VOF (volume-of-fluid) method is widely adopted by general commercial CFD (computational fluid dynamics) codes.
ANSYS CFX ® is a general commercial CFD code that uses the VOF method to treat immiscible interfacial multiphase flows.
On the second experiment all the simulation parameters of Experiment 1 were maintained except the viscosity of the cement which value was replaced by Equation 1.
Considering the power law, total pressure continuously increases until the end of the simulation - Figure 4 (b).

The experimental results were compared with theory based calculations and also with 3-D computational fluid dynamics (CFD) simulation results.
The goals of this study were to use a measurement-based method for separation of thermal contact resistances [8], evaluate the pressure dependence between a SiC chip and Molybdenum and between Molybdenum and bulk Copper and validate the results with 3-D computational fluid dynamics (CFD) simulations.
Steady state thermal CFD simulations of the experiment setup were performed in the model.
Detailed CFD model simulation results.
Good agreement between thermal measurements and 3-D CFD simulations was also obtained.

Simulation of Noise.
Simulation of Dust.
Since airflow simulation is non-trivial regarding its methodology and on the other hand also very performance-intensive to compute, it made no sense to try to put a CFD solver into our simulation.
CFD (a) Scenario 1, (b) 2 and (c) example of resulting velocity field (from scenario 1).
Christian Weber provided the CFD simulation results which then got imported and rasterized in NetLogo.

asiva.seralathan@gmail.com, btmichamech@gmail.com Keywords: CFD, vertical axis wind turbine, NACA profile, self starting Abstract.
A study was done by Mclaren et al. [3, 4] by using CFD simulation of NACA 0015 on dynamic thrust and radial forces on a vertical axis wind turbine blade.
The study to show self-starting capability of cambered airfoil using CFD analysis was reported by Habtamu Beri and Yingxue Yao [5].
The commercial CFD code, ANSYS CFX 13.0© is used for the present numerical studies.
Ziada, CFD simulation of dynamic thrust and radial forces on a vertical axis wind turbine blade, Proceedings of the 15th annual conference of the CFD society of Canada, Toronto, Canada, 2007

In this article, CFD numerical method will be used to research four blades properties of ram air turbine.
We used the CFD numerical method to design the RAT blade, we hope this method will be used in our future products design.
In this article, CFD numerical method will be used to research four blades properties of ram air turbine.
Figure.6 RAT calculation model 3 Numerical Simulation Of Ram Air Turbine Blade The last century since the seventy’s, with the advent of large high-speed computer and the development of a series of effective approximate methods(such as the finite difference method, the finite element method and the finite volume method and so on, make CFD numerical simulate method more and more important to aerodynamics.
It can solve some problems which cannot be solved by experimental method and the method of theoretical analysis. 3.1 Calculation Mesh Of Ram Air Turbine Generated CFD numerical simulation cannot do without the computational grid, that is, the solution domain of discrete space.

Based on CFD numeric simulation for hydraulic retarder under full-filled condition, the pressure distribution functions of the rotor blades surfaces are approached by coordinate transformation and surface fitting.
Key Issues to be Resolved As the CFD and FEA has different geometry and grid system, the interested variable is not the same.
Analysis Process 3.1 The Export of CFD Simulation Results The internal characteristics of flow is simulated by CFD before the finite element analysis [1-2].
Conclusion Based on CFD numeric simulation for hydraulic retarder under full-filled condition, the pressure distribution functions of the rotor blades surfaces are approached by coordinate transformation and surface fitting.
References [1] Yan Jun,He Ren and Lu Ming．Numerical Simulation for Hydraulic Retarder with Different Blade Number[J]．Journal of JiangSu University (Natural Science Edition)，2009,Vol.30(1), p. 27-31.

One method of Fluid-solid coupled interaction simulation Y.W Lin 1,a , *X.C You 1,b, Z.
In the fluid domain, use the CFD to compute the unsteady Navier-Stockes equation; in the solid domain, use CSD to compute the unsteady flutter equation.
Nowadays, Abaqus and Fluent are two distinguished CSD and CFD software.
In this problem, it presents a coupling simulation between Abaqus/standard and Fluent.
[9] XU Min, AN Xiaomin, CHEN Shilu, CFD/ CSD Coupling Numerical Computational Methodology, Acta Aeronautica et Astronautica Sinica. 27(1), 2006:33-37.

Simulation of the Wind Field of Gantry Cranes Based on FLUENT Jingbo Hu1,a, Da Chen2,b, Shuqing Ding1,a,Guangwei Qing 1,a, Hui Jin2,c 1Nanjing Special Equipment Inspection Institute, Nanjing, 210002, P.R.China 2School of Civil Engineering, Southeast University, Nanjing, 210096, P.R.China ahubertert@163.com, bchenda.seu@live.com, cjinhui_seu@163.com Keywords: Gantry crane, wind field, computational fluid dynamics ( CFD ), Fluent.
Computational Simulation of the Wind Field Establishment of the Finite Element Model.
To reach an accurate simulation, those nodes enclosing crane are refined as can be seen from Fig. 5 ( b )
Wang: Computational Fluid Dynamics (CFD) and Engineering Application.
Wang: Principle and Application of CFD software.