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Online since: April 2010
Authors: Mei Jie Zhang, Xiao Long Lin, Wu Yan, Huang Ao
Numerical Simulation of Flow-Induced Corrosion in One-Strand
Tundish
Zhang Meijie1,a, Lin Xiaolong1,b, Wu Yan
2,c and Huang Ao1,d
1
Wuhan University of Science and Technology, Wuhan 430081, China
2
Foshan Ceramics Research Institute Co., Ltd, Foshan 528031, China
a
major6886@yahoo. cn
Keywords.
And then, the characteristics of molten steel flow and the distribution of temperature and the refractory wear factor in a one-strand tundish equipped with flow control devices of a turbulence inhibitor, a weir and a dam were numerically simulated using the commercial CFD software.
In this paper, the tundish refractories wear factor was defined at first and then their distribution with different flow control devices were numerically calculated by CFD software.
[3] P K Iwamasa, G A Caffery, W D Warnica, S R Alias: Inter Conf on CFD in Minetal and Metal Processing and Power Generation.
And then, the characteristics of molten steel flow and the distribution of temperature and the refractory wear factor in a one-strand tundish equipped with flow control devices of a turbulence inhibitor, a weir and a dam were numerically simulated using the commercial CFD software.
In this paper, the tundish refractories wear factor was defined at first and then their distribution with different flow control devices were numerically calculated by CFD software.
[3] P K Iwamasa, G A Caffery, W D Warnica, S R Alias: Inter Conf on CFD in Minetal and Metal Processing and Power Generation.
Online since: April 2010
Authors: E. Vakouftsi, G. Marnellos, C. Athanasiou, Frank A. Coutelieris
A new mesoscopic mathematical model has been developed
through the relative differential equations along with the appropriate boundary conditions, which
have been numerically integrated by using the commercially available software CFD-ACE+, in
order to calculate the electricity produced by the fuel cell.
In the present work, the electrochemical oxidation of both H2 and CO is considered, on contrary to the majority of SOFC simulation works where the contribution of CO is neglected [8].
Simulations The numerical solution for the equations previously described was obtained by using the commercial package CFD-ACE+ by ESI-Group©, which is based on the finite volume method, in order to achieve residual values for all the quantities less than 10-4.
The simulation results seem to follow a practically linear fit, which actually corresponds to the relationship between % mol CH4 and I, thus the slope of this line represents a quantitative indicator of the cell's efficiency.
The above model has been numerically integrated by using the commercially available software CFD-ACE+, and it is found that found that current density increases with the methane concentration in the fuel supply.
In the present work, the electrochemical oxidation of both H2 and CO is considered, on contrary to the majority of SOFC simulation works where the contribution of CO is neglected [8].
Simulations The numerical solution for the equations previously described was obtained by using the commercial package CFD-ACE+ by ESI-Group©, which is based on the finite volume method, in order to achieve residual values for all the quantities less than 10-4.
The simulation results seem to follow a practically linear fit, which actually corresponds to the relationship between % mol CH4 and I, thus the slope of this line represents a quantitative indicator of the cell's efficiency.
The above model has been numerically integrated by using the commercially available software CFD-ACE+, and it is found that found that current density increases with the methane concentration in the fuel supply.
Online since: November 2012
Authors: Sina Salari, Amir Yousefi, M. Reza Nasrollahzadeh, Mostafa Khalilikhah
The CFD code used is Fluent 6.3.
Mufuta et al. [16] have solved the hydro dynamical equations using CFD method without considering eddy current loss.
Flow is numerically modeled in the channels by commercial CFD code Fluent 6.3.
Pepper,” Numerical simulation for natural convection in vertical channels”, International Journal of Heat and Mass Transfer 52 (2009) 4095–4102 [3] B.
Nowak, “Numerical Simulation and Experimental Validation of Coupled Flow, Heat Transfer and Electromagnetic Problems in Electrical Transformers”, Arch Comput Methods Eng (2009) 16: 319–355 [5] J.
Mufuta et al. [16] have solved the hydro dynamical equations using CFD method without considering eddy current loss.
Flow is numerically modeled in the channels by commercial CFD code Fluent 6.3.
Pepper,” Numerical simulation for natural convection in vertical channels”, International Journal of Heat and Mass Transfer 52 (2009) 4095–4102 [3] B.
Nowak, “Numerical Simulation and Experimental Validation of Coupled Flow, Heat Transfer and Electromagnetic Problems in Electrical Transformers”, Arch Comput Methods Eng (2009) 16: 319–355 [5] J.
Online since: May 2012
Authors: Andrea Alaimo, Alberto Milazzo, Flavio Trentacosti, Antonio Esposito
On the effect of Slotted Blades on Savonius Wind Generator
Performances by CFD analysis
A.
Computational Fluid Dynamic Analyses To investigate the overall aerodynamic performances of Savonius wind turbines with slotted blades and buckets overlapping (see Fig. 1), Computational Fluid Dynamics – CFD analyses are performed by using the commercial code Comsol Multiphysics®.
The results obtained through the present CFD model are compared with those obtained by Akwa et al., who employed numerical solutions [13], and by Blackwell et al., who performed experimental studies [12].
Thus, parametric numerical simulations have been performed on the slotted blades configuration for both static and dynamical conditions.
Validating simulations The validating analyses have been performed on a Savonius wind turbine with blades overlap only whose geometric characteristics and flow conditions are those used by Akwa et al. and Blackwell et al. [12, 13].
Computational Fluid Dynamic Analyses To investigate the overall aerodynamic performances of Savonius wind turbines with slotted blades and buckets overlapping (see Fig. 1), Computational Fluid Dynamics – CFD analyses are performed by using the commercial code Comsol Multiphysics®.
The results obtained through the present CFD model are compared with those obtained by Akwa et al., who employed numerical solutions [13], and by Blackwell et al., who performed experimental studies [12].
Thus, parametric numerical simulations have been performed on the slotted blades configuration for both static and dynamical conditions.
Validating simulations The validating analyses have been performed on a Savonius wind turbine with blades overlap only whose geometric characteristics and flow conditions are those used by Akwa et al. and Blackwell et al. [12, 13].
Online since: February 2013
Authors: Masoud Darbandi, Elyas Lakzian
In high Knudsen number flow regimes microgas flow analysis may not be performed accurately using the classical CFD methods.
Alternatively, the gas flow through micro-geometries can be investigated reliably using the direct simulation Monte Carlo (DSMC) method.
Back to past study in the field of gas mixing in micro geometries, Gobby, et al. [7] simulated and analyzed the mixing of methanol and oxygen in a T-shape channel using the CFD method.
Farouk, Numerical Simulation of Gas Flow and Mixing in a Microchannel Using the Direct Simulation Monte Carlo Method.
Li, Gas Mixing in Microchannels Using the Direct Simulation Monte Carlo Method.
Alternatively, the gas flow through micro-geometries can be investigated reliably using the direct simulation Monte Carlo (DSMC) method.
Back to past study in the field of gas mixing in micro geometries, Gobby, et al. [7] simulated and analyzed the mixing of methanol and oxygen in a T-shape channel using the CFD method.
Farouk, Numerical Simulation of Gas Flow and Mixing in a Microchannel Using the Direct Simulation Monte Carlo Method.
Li, Gas Mixing in Microchannels Using the Direct Simulation Monte Carlo Method.
Online since: December 2010
Authors: Min Xia Li, Xiu Hui Li, Zhan Zhong Wang
The numerical simulation was carried out with commercial CFD software-Fluent and the k-ε model was established to research this project.
From the results of the simulation and the experiment, it is shown that the method of numerical simulation coupling fan and laboratory model was feasible to the simulation of the laboratory. ⅠIntroduction Establish desert environment simulation laboratory aimed at retreating the desert region environment in the laboratory by hand, building a simulating natural conditions and a artificial environment space according to the natural climate change regularity, and then, going on the research of the desert region system.
The goal to improve flow laboratory is to achieve the simulation of natural wind through the rational model of airflow organization in simulation area, meet the demands of wind field experiment of wind, and mainly meet the requirements to speed. Ⅳ The numerical simulation of desert environment simulation laboratory Figure 2.
Goulas: Efficient treatment of complex geometries for large eddy simulations of turbulent flows.
Rodi: Large-eddy simulation of flow around low-pressure turbine blade with incoming wakes AIAA Journal, 41(11):2143-2156,(2003) [5] ZHOU Sheng-jie: Airflow Numerical Simulation and Optimization of Artificial Simulation Environment Test-chamber”,Fluid Machinery Vol.36, No.04,(2008) P.73
From the results of the simulation and the experiment, it is shown that the method of numerical simulation coupling fan and laboratory model was feasible to the simulation of the laboratory. ⅠIntroduction Establish desert environment simulation laboratory aimed at retreating the desert region environment in the laboratory by hand, building a simulating natural conditions and a artificial environment space according to the natural climate change regularity, and then, going on the research of the desert region system.
The goal to improve flow laboratory is to achieve the simulation of natural wind through the rational model of airflow organization in simulation area, meet the demands of wind field experiment of wind, and mainly meet the requirements to speed. Ⅳ The numerical simulation of desert environment simulation laboratory Figure 2.
Goulas: Efficient treatment of complex geometries for large eddy simulations of turbulent flows.
Rodi: Large-eddy simulation of flow around low-pressure turbine blade with incoming wakes AIAA Journal, 41(11):2143-2156,(2003) [5] ZHOU Sheng-jie: Airflow Numerical Simulation and Optimization of Artificial Simulation Environment Test-chamber”,Fluid Machinery Vol.36, No.04,(2008) P.73
Online since: June 2012
Authors: Mei Qin Li, Gui Ying Shen, Zhen Zhe Li, Rui Jiang, Ming Ren
Numerical Simulation of Cooling System of Battery
Using Parameter Study
Rui Jiang1, Zhen-Zhe Li1, a, Gui-Ying Shen1, Ming Ren1 and Mei-Qin Li1
1College of Mechanical and Electrical Engineering, Wenzhou University
Wenzhou Higher Education Park, Zhejiang, P.R.
China aa13868659593@163.com Keywords: Battery, Cooling system, Heat transfer, Numerical simulation Abstract.
Hu has studied the temperature distribution of battery pack using CFD (computational fluid dynamics), and recommended a new cooling strategy for battery pack[11].
In this study, the steady simulations were carried out using a commercial CFD code – FLUENT.
The standard k-ε turbulence model was used for the simulation of convection, and 3 dimensional heat conduction was included.
China aa13868659593@163.com Keywords: Battery, Cooling system, Heat transfer, Numerical simulation Abstract.
Hu has studied the temperature distribution of battery pack using CFD (computational fluid dynamics), and recommended a new cooling strategy for battery pack[11].
In this study, the steady simulations were carried out using a commercial CFD code – FLUENT.
The standard k-ε turbulence model was used for the simulation of convection, and 3 dimensional heat conduction was included.
Online since: January 2014
Authors: Zaliman Sauli, Tan Hsio Mei, Nor Shakirina Nadzri, K. Anwar, Nooraihan Abdullah, Vithyacharan Retnasamy, Steven Taniselass
Numerical simulation was performed usingAnsys-CFX software with the assumption of Newtonian fluid and laminar condition.
The simulation result showed that wall shear stress distribution increased after the fluid passing through the step.
The flow profile analysis from 3D Computational Fluids Dynamics (CFD) showed efficiency of wall shear stress profile reacting on the spherical cell model in the crescent trap [2].
The simulation was implemented in steady state with laminar condition.
The step height employed for the simulation is 1µm with Reynolds number of 500.
The simulation result showed that wall shear stress distribution increased after the fluid passing through the step.
The flow profile analysis from 3D Computational Fluids Dynamics (CFD) showed efficiency of wall shear stress profile reacting on the spherical cell model in the crescent trap [2].
The simulation was implemented in steady state with laminar condition.
The step height employed for the simulation is 1µm with Reynolds number of 500.
Online since: November 2012
Authors: Xing Wen Du, Hui Feng Tan, Jian Zheng Wei, Rui Qiang Ma
Simulation for Gas-Membrane Interaction of Folded
Membrane Tubes During Inflation
Jianzheng Wei 1,2, a, Ruiqiang Ma 1, Huifeng Tan 1,b, and Xingwen Du 1
1Center for Composite Materials, Harbin Institute of Technology, Harbin, 150080, China.
2Post-doctoral Research Center in Materials Science & Engineering,
Harbin Institute of Technology, Harbin, 150080, China.
And then, the gas-membrane interaction is calculated by couple the CFD and CSD solver.
Gas-structure interaction problem is one of the challenging problems in numerical simulation, which is still on the initial stage.
The strong coupling method need solve CFD and CSD Equation in same time and spatial domain, and mesh system needn’t information exchange.
In weak coupling method, solve the aerodynamic and structural deformation by CFD solver and CSD solver, and transfer relevant data through a third party program or software.
And then, the gas-membrane interaction is calculated by couple the CFD and CSD solver.
Gas-structure interaction problem is one of the challenging problems in numerical simulation, which is still on the initial stage.
The strong coupling method need solve CFD and CSD Equation in same time and spatial domain, and mesh system needn’t information exchange.
In weak coupling method, solve the aerodynamic and structural deformation by CFD solver and CSD solver, and transfer relevant data through a third party program or software.
Online since: August 2013
Authors: Chun Han Chien, Hsien Te Lin
Zhao [3] used CFD simulation results to show that maximum airflow in a passive solar chimney is achieved using an optimal depth and height ratio of approximately 1:10.
Miyazaki [6] used a CFD simulation to analyze the effects of a solar chimney on office buildings in a Japanese climate.
The CFD simulation results showed that the maximum airflow rate was obtained with a height of 3.6 m and a width of 0.3 m or more.
Miyazaki [6] used a CFD simulation to analyze the effects of a solar chimney on office buildings in a Japanese climate.
The CFD simulation results showed that the maximum airflow rate was obtained with a height of 3.6 m and a width of 0.3 m or more.