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Online since: October 2014
Authors: Tian Lin Wang, Yong Zhao
A numerical study of flow in two-dimensional turbulent boundary layer flow with mass injection through a porous wall is conducted by Reynolds averaged numerical simulation (RANS) in this paper.
This physical quantity is determined by the derivative of velocity and eddy viscosity, so it’s an appropriate candidate for checking numerical simulation.
Numerical simulation shows that mass injection plays a very active role in resistance reducing.
Turbulence Modeling for CFD, 3rd edition, DCW Industries, Inc., La Canada CA, 2006
This physical quantity is determined by the derivative of velocity and eddy viscosity, so it’s an appropriate candidate for checking numerical simulation.
Numerical simulation shows that mass injection plays a very active role in resistance reducing.
Turbulence Modeling for CFD, 3rd edition, DCW Industries, Inc., La Canada CA, 2006
Online since: August 2015
Authors: Muhammad Khalil Abdullah, Mohd Zulkifly Abdullah, Mohammad Hafifi Hafiz Ishak, A. Abdul Aziz, W.K. Loh, R.C. Ooi, C.K. Ooi
Curing kinetics is taken into consideration in the simulation using Kamal’s equation.
(αρv) = 0 (4) This obtained numerical solutions of the flow distribution, pressure distribution, and underfill volume fraction with respect to time by using a commercial computational fluid dynamics (CFD) code (ANSYS FLUENT 14.0) Simulation Modelling The flip chip were built and meshed according to the dimensions as presented in Table 1.
For simulation, the top and bottom surfaces were treated as no-slip boundary conditions.
Wang, On the simulation of microelectronic encapsulation with epoxy molding compound.
Nguyen, Reactive flow simulation in transfer molding of IC packages.
(αρv) = 0 (4) This obtained numerical solutions of the flow distribution, pressure distribution, and underfill volume fraction with respect to time by using a commercial computational fluid dynamics (CFD) code (ANSYS FLUENT 14.0) Simulation Modelling The flip chip were built and meshed according to the dimensions as presented in Table 1.
For simulation, the top and bottom surfaces were treated as no-slip boundary conditions.
Wang, On the simulation of microelectronic encapsulation with epoxy molding compound.
Nguyen, Reactive flow simulation in transfer molding of IC packages.
Online since: March 2013
Authors: Ricardo Aguasca, Gabriel Winter, Miguel A. Moreno, Begoña González, Vicente Enríquez, Fabián A. Déniz
In this paper some numerical simulations of the Navier-Stokes Equations (NSE) to test the novel NS-α and NS-ω turbulence models [1, 2], which conserve energy, enstrophy, and helicity, are presented.
It takes the order of hundreds of simulations per iteration to evaluate all candidate solutions.
Without analytic solutions to the NSE, scientists have carried out computer simulations, these has been partially successful; for slow moving, viscosity dominated flows on small domains, accurate solutions can be obtained using direct numerical simulations (DNS) of unsteady flow.
This is the reason why it is necessary to find new alternative formulations (like the weak formulations) of the NSE to provide a simulation for the unsteady state.
Also we are working on comparing results obtained with these methods and results provided by other CFD programs.
It takes the order of hundreds of simulations per iteration to evaluate all candidate solutions.
Without analytic solutions to the NSE, scientists have carried out computer simulations, these has been partially successful; for slow moving, viscosity dominated flows on small domains, accurate solutions can be obtained using direct numerical simulations (DNS) of unsteady flow.
This is the reason why it is necessary to find new alternative formulations (like the weak formulations) of the NSE to provide a simulation for the unsteady state.
Also we are working on comparing results obtained with these methods and results provided by other CFD programs.
Online since: May 2013
Authors: Lin Xue, Li Jing Wang, Ye Yuan
Numerical simulation and experimental study results indicated that the fire turbopump could meet application requirement.
To keep turbopump inner steady flow, numerical simulation is presented to analyze the pressure field.
The flow simulation model is built by PRO/E and unstructured tetrahedral mesh is generated using ICEM.
Turbine Pump Figure.4 Computational domains At present study, the commercially available CFD code, CFX is used.
Wu, et al. 3D Unsteady Turbulence Simulation of the Runaway Transients of the Francis Turbine.
To keep turbopump inner steady flow, numerical simulation is presented to analyze the pressure field.
The flow simulation model is built by PRO/E and unstructured tetrahedral mesh is generated using ICEM.
Turbine Pump Figure.4 Computational domains At present study, the commercially available CFD code, CFX is used.
Wu, et al. 3D Unsteady Turbulence Simulation of the Runaway Transients of the Francis Turbine.
Online since: October 2013
Authors: Cong Lei Wang, Jian Hong Sun, Chang Yue Xu
In Table 1, we compared our simulation results with experimental results.
The simulation results show that, the intersection of reflected shock wave, bow shock wave and vortex flow generate membrane bump and unstable oscillation.
CFD analysis of the flow from an airbag inflator module [C].
Simulation of a compartmented airbag development using an explicit, coupled Euler / Largrangian method with adaptive Euler domains [EB/OL]
Three dimensional numerical simulation study on the flow of the explosion shock wave around the wall [J].
The simulation results show that, the intersection of reflected shock wave, bow shock wave and vortex flow generate membrane bump and unstable oscillation.
CFD analysis of the flow from an airbag inflator module [C].
Simulation of a compartmented airbag development using an explicit, coupled Euler / Largrangian method with adaptive Euler domains [EB/OL]
Three dimensional numerical simulation study on the flow of the explosion shock wave around the wall [J].
Online since: May 2011
Authors: Rui Yu Chen, Xue Peng Jiang, Zhi Sheng Xu
Quite T-Square fire was used for the fire growth in this simulation.
The fire reached the heat release rate of 5 MW after a simulation time of about 600 s.
Steady heat release rate was maintained thereon until the end of computer simulation.
Simulation Results and Discussion There were two criterions of evaluation the effectiveness of smoke control schemes.
And at the simulation time of 120 s, smoke exhaust from exit E.
The fire reached the heat release rate of 5 MW after a simulation time of about 600 s.
Steady heat release rate was maintained thereon until the end of computer simulation.
Simulation Results and Discussion There were two criterions of evaluation the effectiveness of smoke control schemes.
And at the simulation time of 120 s, smoke exhaust from exit E.
Online since: November 2011
Authors: Xin Li Wei, Xiang Rui Meng, Xin Ling Ma, Ji Fu Lu
With the aid of CFD software this problem can be solved well, because we can find the law or disadvantage of the air flow conditions between the fins and around the heat sink by simulation.
Simulation object Figure 3.
Other simulation conditions are as follows.
Numerical simulation of heat sink prototype The Figs. 4 and 5 shows the simulation results of heat sink prototype.
Numerical simulation.
Simulation object Figure 3.
Other simulation conditions are as follows.
Numerical simulation of heat sink prototype The Figs. 4 and 5 shows the simulation results of heat sink prototype.
Numerical simulation.
Online since: June 2010
Authors: Zhi Ming Qu, Xiao Yu Ma
These studies results are mainly in applying CFD to
compare and evaluate.
It is only through simulation to do some researches.
During the iterative simulation, the pressure is updated.
Flow field pressure in simulation is settled to be an atmospheric pressure.
The experimental study and numerical simulation of the tunnel fire verify the three-dimensional numerical simulation of turbulence model and conduct comparative analysis.
It is only through simulation to do some researches.
During the iterative simulation, the pressure is updated.
Flow field pressure in simulation is settled to be an atmospheric pressure.
The experimental study and numerical simulation of the tunnel fire verify the three-dimensional numerical simulation of turbulence model and conduct comparative analysis.
Online since: May 2014
Authors: Wen Xian Lin, Tao Liu, Wen Feng Gao, Steven W. Armfield
Three-dimensional direct numerical simulation of unsteady transitional round fountains in a homogeneous fluid
Wenxian Lin1,2,a, Tao Liu2,b, Wenfeng Gao2,c and Steven W.
Armfield3,d 1School of Engineering & Physical Sciences, James Cook University, Townsville, QLD 4811, Australia 2Solar Energy Research Institute, Yunnan Normal University, Kunming, Yunnan 650092, China 3School of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydney, NSW 2006, Australia awenxian.lin@jcu.edu.au, b814735591@qq.com, c413900096@qq.com, dsteven.armfield@sydney.edu.au Keywords: Transitional round fountain, direct numerical simulation, asymmetry, unsteadiness.
In this study, a series of three-dimensional direct numerical simulations are carried out for transitional round fountains with Re and Fr in the ranges of 1 £ Fr £ 8, 50 £ Re £ 500 to reveal their unsteady flow dynamics, in particular the onset of asymmetry, three-dimensionality, and unsteadiness.
The meshes between 2.55 and 5.38 million cells are used for the DNS runs which were conducted using the commercial CFD package Ansys Fluent.
Armfield, Direct simulation of weak axisymmetric fountains in a homogeneous fluid, J.
Armfield3,d 1School of Engineering & Physical Sciences, James Cook University, Townsville, QLD 4811, Australia 2Solar Energy Research Institute, Yunnan Normal University, Kunming, Yunnan 650092, China 3School of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydney, NSW 2006, Australia awenxian.lin@jcu.edu.au, b814735591@qq.com, c413900096@qq.com, dsteven.armfield@sydney.edu.au Keywords: Transitional round fountain, direct numerical simulation, asymmetry, unsteadiness.
In this study, a series of three-dimensional direct numerical simulations are carried out for transitional round fountains with Re and Fr in the ranges of 1 £ Fr £ 8, 50 £ Re £ 500 to reveal their unsteady flow dynamics, in particular the onset of asymmetry, three-dimensionality, and unsteadiness.
The meshes between 2.55 and 5.38 million cells are used for the DNS runs which were conducted using the commercial CFD package Ansys Fluent.
Armfield, Direct simulation of weak axisymmetric fountains in a homogeneous fluid, J.
Online since: May 2011
Authors: Hui Zhao, Wen Jing Liu, Chao He Yang, Hong Hong Shan
Simulation Study of Gas-Solid Macro-Mixing Characterization in Small Fixed-Fluidized Bed Reactor
Wenjing Liu1, a, Hui Zhao1, b, Chaohe Yang1, c, Honghong Shan1, d
1 State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong 266555, PR China
azjhjsnh@163.com, bzhaohui@upc.edu.cn, cyangch@upc.edu.cn, dshanhh@upc.edu.cn
Keywords: 3D-CFD simulation; Small fixed-fluidized bed reactor; Gas residence time distribution; Macro-mixing characterization
Abstract.
Many researchers hope to understand the flow phenomenon by testing and simulation in order to improve and optimize the reactor design.
Currently, Gobin et al. [8] presented their capabilities to predict the overall flow of the form of simulation in large reactor.
Simulation and mathematical model Mathematical model.
In Numerical Simulation of a Gas-Phase Polymerisation Reactor.
Many researchers hope to understand the flow phenomenon by testing and simulation in order to improve and optimize the reactor design.
Currently, Gobin et al. [8] presented their capabilities to predict the overall flow of the form of simulation in large reactor.
Simulation and mathematical model Mathematical model.
In Numerical Simulation of a Gas-Phase Polymerisation Reactor.