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Online since: December 2010
Authors: Zhi Guo Zhang, Xi Chen, Chen Lin, Xian Zhou Wang
Since it needs less computing resource and time to get 1D simulation results with some accuracy, the application of multi-dimension CFD could be very helpful to improve accuracy of 1D result with the details of the different simplified model parameters used in 1D model.
Later the modeling effort was extended to 2D simulation by Cleveland State University, and today there are ongoing multidimensional simulation efforts using commercial simulation codes [4].
Multi-dimensional Model Simulation.
The 2D simulation begins first to get the CFD results as is shown in Fig. 5, and then the CFD results were used as the input values for the Sage simulation.
Table 2 gives a summary of the simulation result different model of the CFD and Sage.
Online since: June 2016
Authors: Pradip Aryal, Thananchai Leephakpreeda
This paper presents a CFD analysis on thermal comfort and indoor air quality affected by partitions in an air-conditioned building.
CFD experiments are carried out to simulate variables of indoor air before/after installation or removal of partitions.
Numerical simulations are carried out with case studies: a) library without partition and b) library with partition since the real installation of partitions in large indoor facilities may not be practical and economical.
Heat sources and other indoor entities are subsequently added to the CFD model.
Slight differences in values between simulation and experiment are recorded for air temperature, relative humidity and CO2 concentration but the maximum difference is below 10%.
Online since: October 2015
Authors: Raghda Heikal
FLUENT 14 software was used to carry out the CFD study in a one-phase flow (liquid), as well as in two-phase flow simulations.
Li et al. [8] carried out a comparison between CFD simulations using two different codes, Phonetics and Fluent,, it was found that Fluent is a reliable as code to study the design of the refrigerant distributor and the maldistribution inside it.
CFD simulations were used to evaluate the performance of both existing and altered designs for refrigerant distributors.
Model Comparisons To evaluate the results obtained by CFD to flow in refrigerant distributors, the simulation results from FLUENT were compared with results from FLUENT and PHOENICS obtained by Li et al. [8], [10].
Dorao, "CFD simulation for steam distribution in header and tube assemblies," Chemical engineering research and design, vol. 90 , p. 487–506, 2012. [16] P.
Online since: October 2014
Authors: Da You, Tao Yang, Wen Jiang Chen, Xiao Zhi Wang, Gui Xiang Wu
The simulation uses residual of 10-5 high precision to calculate, and obtains the residual convergence curve.
Numerical simulation is one of the methods which are commonly used to design thermal system.
Numerical simulation of FLUENT heat exchanger independent dedicated ventilation system FLUENT software is the most popular CFD software on the market at present[5,6].
The online survey found that FLUENT is CFD software which is also widely used in China.
Firstly, it establishes the flow field and solid field control equation mathematical model based on computational fluid dynamics CFD theory.
Online since: August 2012
Authors: Tao Ye, Meng Liu
In this study, moving mesh technique is used to construct an outside flow CFD model around H-vertical axis wind turbine with different types of airfoil.
Numerical simulation method Equation.
Number the three blades of CFD model as yepian 1, yepian 2, yepian 3.
[2] Zhiqian Yang, Wenzhuan Cui: Numerical simulation for 2D unsteady flow around the vertical axis wind turbine (Modern Manufacturing Engineering, 2009)
[3] Congxin Yang, Faming Wu, Yuliang Zhang: Numerical simulation on unsteady rotated flow of a vertical axis wind turbine based on moving meshes (TRANSCATIONS OF THE CHINESE SOCIETY FOR AGRCULTURAL MACHINERY, 2009) [4] Ping He, Danmei Hu: The numerical simulation of offshore wind turbine (Renewable Energy Resource, V01.28 No.4 Aug.2010)
Online since: May 2011
Authors: Xing Gang Tang, Rabbar Hamzaoui, David Bassir, Rani El Meouche, Jean François Khreim, Zhi Qiang Feng, Mehdi Rezoug
Ref.[8] presented a solution for the optimization problem with CFD simulation, which can be alternatively implemented with the RSM and GA via the software modeFRONTIER.
The optimization is not directly performed with the real CFD simulation, but the Response Surface approximation instead.
Fig.1 CFD modeling of ESTP Cachan: (a) the aerial map of ESTP; (b) Parametric 3D CAD model; (c) CFD mesh model with results contour.
With this database, the Response Surface will be constructed to replace the real CFD simulation.
With the CFD model illustrated in Fig.1(c), the DOE stage took nearly 50 hours to finish all the simulations.
Online since: October 2012
Authors: Yong Quan, Shuo Wang, Ming Gu, De Qian Zheng, Ai She Zhang
The pedestrian level wind environment including wind comfort and wind safety was assessed with the Computational Fluid Dynamics (CFD) method.
The aerodynamic information of the entire flow field was obtained using CFD software.
By CFD numerical simulation, the ratio (rM) of the measuring point wind speed (Uz) to the standard wind speed in meteorological data (U10) can be obtained.
Process of the assessment of pedestrian level wind environment CFD numerical simulation Geometric model and meshing.
Numerical simulation results of eight typical directions Fig.8.
Online since: December 2012
Authors: Ya Jun He, Fei Yu Song, Bin Hong, Yang Wang, Tao Xu, Xiao Long Li
DME chemical reaction kinetic mechanism is applied to three-dimensional computational fluid dynamics (CFD) model.
The simulation results will provide guidelines for the future experiments.
A CFD (computational fluid dynamics) model was established in FIRE.
Simulation Results Kinematics and combustion characteristics comparison.
A one-dimensional dynamics model and a three-dimensional CFD model have been used to analyze the combustion characteristics.
Online since: March 2014
Authors: Sen Zhang, Yun Long Zhu, Qiu Xia Qin, Du Xi Liu
The flow field of the static tube is simulated and analyzed to get pressure coefficient Cp curve in flight test environment by using Computational Fluid Dynamics (CFD) technology.
Based on the simulation result and considering the impact of front and rear connectors, the main geometric paramters of static tube is determined and optimized.
Table 1 The Cp of different diameter of static port d/(mm) ΔP= Pi-P∞/ (Pa) Cp 0.8 320.3 0.0174 1.0 219.0 0.0119 1.2 346.0 0.0188 1.4 228.2 0.0124 1.6 347.9 0.0189 Fig. 7 Velocity distribution inside the static tub Comprehensive Simulation of Static Tube Parameters Based on the CFD simulation result data item, the parameter of the static tube is determined as follow: the length is 390mm; the static port location is 250mm; 6 static ports uniformly distribute along the circumference; the diameter of static port is 1.0mm; the inner and outer diameter are respectively 6.8mm and 10mm.
A simulation of the static tube with numerical computation method has been done to verify that the design of the static tube can accurately measure the static pressure of aircraft within the scope of Mach number.
The simulation result shows that, the Cp of the static tube designed is less than 0.02, which is higher than that of the airborne pitot static pressure measurement system.
Online since: October 2014
Authors: Ning Kang, Yuan Cao
The deeper and wider range of CFD application, the more complicated CFD problem.
Yang: CFD Simulation Credibility Analysis Based on Grid Computation.
National CFD Conference, China, 2004 [2] C.Y.
Guo: Effect of Near-Wall Grid Size on Turbulent Flow Simulation.
Huang: Effect of Grid shape on Simulation Results.
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