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Online since: May 2012
Authors: Dong Li, Qiu Shi Wang, Han Bing Qi, Jing Wang, Yu Shi Wang
China
aqihanbing@sina.com,bwysdm1314@163.com,cqiushi19870418@126.com, dwangjing1108@126.com,elidonglvyan@126.com
Key words: Double ventilation glass, Hot channel, Heat transfer characteristics, CFD
Abstract.
The structural characteristics and heat transfer characteristics of double ventilation glass with hot channel are analyzed, whose heat transfer model is set up, we simulate air distribution of double ventilation glass with hot channel using Computational Fluid Dynamics (CFD) scheme as a simulation technique.
Several theoretical studies have been conducted in numerical simulation to investigate the influencing factors of double glass curtain wall, such as flow rate of outlet[2], integrated heat transfer coefficient[3], and position of vent[4].
CFD Model Set-up Physical Model.
a) b) c) Fig.3 X axis section velocity field a)X=20mm; b)X=30mm;c)X=60mm Three-dimensional simulation of ventilation glass in the summer.
The structural characteristics and heat transfer characteristics of double ventilation glass with hot channel are analyzed, whose heat transfer model is set up, we simulate air distribution of double ventilation glass with hot channel using Computational Fluid Dynamics (CFD) scheme as a simulation technique.
Several theoretical studies have been conducted in numerical simulation to investigate the influencing factors of double glass curtain wall, such as flow rate of outlet[2], integrated heat transfer coefficient[3], and position of vent[4].
CFD Model Set-up Physical Model.
a) b) c) Fig.3 X axis section velocity field a)X=20mm; b)X=30mm;c)X=60mm Three-dimensional simulation of ventilation glass in the summer.
Online since: July 2011
Authors: Kuang Yu Wang, Chih Hong Huang
., Taipei, 10608, Taiwan
ahuangch@ntut.edu.tw, bwky1010@yahoo.com.tw
Keywords: urban ecology, wind field, micro climate, aerosol, CFD, green building
Abstract.
Method The measured data were used as the basis for the simulation analysis in this study.
The data were analyzed in the CFD simulation.
Numerical calculation was combined with CFD software, along with k-ε turbulence model analysis and finite-volume method, to solve the dynamic equations and energy formula.
Chen, Natural ventilation in buildings: measurement in a wind tunnel and numerical simulation with large-eddy simulation, Journal of Wind Engineering and Industrial Aerodynamics, vol. 91, 2003, pp.331–353 [4] A.P.
Method The measured data were used as the basis for the simulation analysis in this study.
The data were analyzed in the CFD simulation.
Numerical calculation was combined with CFD software, along with k-ε turbulence model analysis and finite-volume method, to solve the dynamic equations and energy formula.
Chen, Natural ventilation in buildings: measurement in a wind tunnel and numerical simulation with large-eddy simulation, Journal of Wind Engineering and Industrial Aerodynamics, vol. 91, 2003, pp.331–353 [4] A.P.
Online since: February 2012
Authors: B. Lv, W.L. Wei, Y.L. Liu
3D Numerical Simulation of Hydraulics in an Oxidation Ditch
B.
Liu Institute of Hydraulic Engineering ,Xi’an University of Technology, Xi’an, China,710048 wei_wenli@126.com Keywords: hydrodynamics; CFD simulation; Oxidation ditch Abstract: A numerical simulation study of the hydrodynamics of an oxidation ditch is presented.
Bob[l] and Stamon [2] carried on numerical simulation for the two-dimensional velocity of the integrated oxidation ditch by using the κ-ε mathematical model, and analyzed the water flows in the diversion wall.
This paper focuses on the hydrodynamics of an oxidation ditch by the simulation method.
The flow field in the oxidation ditch is simulated with computational fluid dynamics (CFD).
Liu Institute of Hydraulic Engineering ,Xi’an University of Technology, Xi’an, China,710048 wei_wenli@126.com Keywords: hydrodynamics; CFD simulation; Oxidation ditch Abstract: A numerical simulation study of the hydrodynamics of an oxidation ditch is presented.
Bob[l] and Stamon [2] carried on numerical simulation for the two-dimensional velocity of the integrated oxidation ditch by using the κ-ε mathematical model, and analyzed the water flows in the diversion wall.
This paper focuses on the hydrodynamics of an oxidation ditch by the simulation method.
The flow field in the oxidation ditch is simulated with computational fluid dynamics (CFD).
Online since: October 2011
Authors: Guan Xuan Liao, Jia Lu, Zhong Jun Ding, Xian Jia Huang, Xi Shi Wang
Compared simulation result with experiment result, the suitable CFD model to simulate interaction of water mist with turbulent gas jet flame was tested and selected.
CFD Simulation Simulation of gas jet flame The gas jet flame was created by the combustion of methane, injected through a nozzle in a open quiescent environment.
Results and discussion of CFD simulation Based on the experimental parameter, the interaction between water mist and gas jet flame was simulated by the CFD simulation.
Compared with the experiment result, the typical phenomenon including the extinguishment and liftoff of flame were obtained by the CFD simulation.
The process of CFD simulation shows good agreement with experimental result.
CFD Simulation Simulation of gas jet flame The gas jet flame was created by the combustion of methane, injected through a nozzle in a open quiescent environment.
Results and discussion of CFD simulation Based on the experimental parameter, the interaction between water mist and gas jet flame was simulated by the CFD simulation.
Compared with the experiment result, the typical phenomenon including the extinguishment and liftoff of flame were obtained by the CFD simulation.
The process of CFD simulation shows good agreement with experimental result.
Online since: July 2014
Authors: Krishna Murari Pandey, Ritabrata Thakur, Abhinav Hazarika, Tarun Ashutosh, Dipankar Gogoi
Non-Newtonian Computational Fluid Dynamics (CFD) Modelling on Left Coronary Artery with Multiple Blockages
K.M.
This paper provides an analytical study on the variation of static pressure with multiple blockages in the artery implementing the conventional simulation software.
Introduction The objective of this paper is to analyse the various parameters indispensable to the proper functioning of the heart using CFD analysis.
Ganesh Kamath, “FSI Simulation of Common Carotid under Normal and High Blood Pressures”.2012 [6] Barbara M.
Johnston, Stuart Corney, David Kilpatrick, “Non-Newtonian blood flow in human right coronary arteries: Transient simulations”.
This paper provides an analytical study on the variation of static pressure with multiple blockages in the artery implementing the conventional simulation software.
Introduction The objective of this paper is to analyse the various parameters indispensable to the proper functioning of the heart using CFD analysis.
Ganesh Kamath, “FSI Simulation of Common Carotid under Normal and High Blood Pressures”.2012 [6] Barbara M.
Johnston, Stuart Corney, David Kilpatrick, “Non-Newtonian blood flow in human right coronary arteries: Transient simulations”.
Online since: November 2011
Authors: Li Xiao Gong, Jian Tao Lv, Quan Shuai Gong, Xiao Dong Hu
Seal System Optimization Study of an On-off Valve based on CFD
Hu Xiaodong, Gong Quanshuai, Gong Lixiao, LvJiantao
College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, 266510
huxdd@sohu.com
Keywords: out-off valve; seal plate; computational fluid dynamics
Abstract.
The dynamical performances of mixed gas in the out-off valve which is used in the PSA have been studied in this paper to explore the reasons of irrational failure of seal gasket with the material of Teflon and the method of CFD.
This simplification would make the actual flow rate higher than the simulation.
Fluid Dynamics Analysis The distribution rules of fluid dynamics performances in Out-off valves have been obtained with the procedure of modeling, meshing, boundary conditions simplification, mathematical model chosen, simulation computation and date post-processing.
CFD analysis and optimization of automotive air-conditioning duct system.
The dynamical performances of mixed gas in the out-off valve which is used in the PSA have been studied in this paper to explore the reasons of irrational failure of seal gasket with the material of Teflon and the method of CFD.
This simplification would make the actual flow rate higher than the simulation.
Fluid Dynamics Analysis The distribution rules of fluid dynamics performances in Out-off valves have been obtained with the procedure of modeling, meshing, boundary conditions simplification, mathematical model chosen, simulation computation and date post-processing.
CFD analysis and optimization of automotive air-conditioning duct system.
Online since: September 2012
Authors: Y.B. Tian, S.T. Lai, Z.W. Zhong
Modeling and simulation is a viable alternative approach.
In this paper, we present a CFD model using a three-wafer loading configuration which enables to predict the slurry flow between wafer and pad under different process variables.
Fig. 2 Geometry of developed model Simulation conditions Commercial software ANSYS™ 13 Workbench was used for this simulation study.
The simulation was conducted with a time step size of 10-3 s.
From the contours diagram, it can be seen that the contours exhibit similar trend to the velocity field obtained from the CFD model.
In this paper, we present a CFD model using a three-wafer loading configuration which enables to predict the slurry flow between wafer and pad under different process variables.
Fig. 2 Geometry of developed model Simulation conditions Commercial software ANSYS™ 13 Workbench was used for this simulation study.
The simulation was conducted with a time step size of 10-3 s.
From the contours diagram, it can be seen that the contours exhibit similar trend to the velocity field obtained from the CFD model.
Online since: October 2017
Authors: Daniel Gross, Nico Hanenkamp, Sven Amon, Nikolas Ferguson
The basic idea is to implement these geometries in computational fluid dynamics (CFD) and finally proceed to an evaluation and comparison of the simulation results, in order to select the best candidates for optimization and realization.
Since the simulation of phase transitions of CO2 requires complex calculation models and this complexity is not necessary for an initial analysis of different nozzle geometries, this article simulates using CFDs, which have already proven themselves in earlier simulations.
Fig. 1: Agglomeration Mechanisms [7] Geometries The geometries used for the CFD simulations all have identical general dimensions.
Fig. 2: Tested Geometries Simulation The CFD simulation consists of a string of operations which are undertaken in several different programs.
The reason for this is the absent solidification model in the CFD program.
Since the simulation of phase transitions of CO2 requires complex calculation models and this complexity is not necessary for an initial analysis of different nozzle geometries, this article simulates using CFDs, which have already proven themselves in earlier simulations.
Fig. 1: Agglomeration Mechanisms [7] Geometries The geometries used for the CFD simulations all have identical general dimensions.
Fig. 2: Tested Geometries Simulation The CFD simulation consists of a string of operations which are undertaken in several different programs.
The reason for this is the absent solidification model in the CFD program.
Online since: December 2012
Authors: Ya Jun He, Xiao Long Li, Yang Wang, Tao Xu, Fei Yu Song, Bin Hong
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.
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: December 2010
Authors: Chen Lin, Zhi Guo Zhang, Xi Chen, 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.
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.