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Online since: May 2014
Authors: Hui Bao, Wei Jiang, Dan Wei
The simulation results show that, this model can well reflect the dynamic and static characteristics of a battery, and the Calman algorithm can keep good accuracy in the estimation process.
Finally, the Matlab simulation results verify the feasibility of this method.
Form the current results of the research, it’s very difficult to describe a battery’ whole performance accurately only using a battery model, so there are various methods to establish the battery model to describe the different types of battery, such as the equivalent circuit model, the electrochemical model, the finite element model, CFD model etc..
Simulation and Verification.
Conclusion From the simulation results we can see, that the EKF algorithm can keep good accuracy in the battery SOC estimation process, have strong corrective action to the initial error of the SOC, and also have certain inhibition effect on the system noise and measurement noise.
Finally, the Matlab simulation results verify the feasibility of this method.
Form the current results of the research, it’s very difficult to describe a battery’ whole performance accurately only using a battery model, so there are various methods to establish the battery model to describe the different types of battery, such as the equivalent circuit model, the electrochemical model, the finite element model, CFD model etc..
Simulation and Verification.
Conclusion From the simulation results we can see, that the EKF algorithm can keep good accuracy in the battery SOC estimation process, have strong corrective action to the initial error of the SOC, and also have certain inhibition effect on the system noise and measurement noise.
Online since: December 2011
Authors: Richard Bateman, Xi Zhi Sun, Saiful Che Ghani, Kai Cheng
The major findings presented in this paper include (1) simulation of steady state temperature distribution on tool insert; (2) simulation of cooling efficiency of coolant jet impingement in internally cooled cutting tool; (3) presentation of statistical result of the effects of space between channel and internal wall of the insert, channel diameter and fluid temperature on the heat transfer rate.
The boundary conditions for CFD and heat transfer analysis will not be discussed in this paper and will be published separately.
(b) (a) Fig. 5: Simulation result of (a) temperature distribution for combination number 1 when x1=0.3mm, x2=0.8mm and x3=292K and (b) temperature distribution of dry- machining cutting tool The simulation results show that the lowest temperature achieved is 388.102K when the level of the space is highest; the channel diameter is at the highest; meanwhile the cooling fluid temperature is at the lowest.
The simulation result for cutting temperature from experimental design is analysed statistically resulting in 6-term regression model (Eq.2).
The simulation results denote that internally cooled cutting tool can reduce cutting temperature to more than 50°C compared to dry- machining.
The boundary conditions for CFD and heat transfer analysis will not be discussed in this paper and will be published separately.
(b) (a) Fig. 5: Simulation result of (a) temperature distribution for combination number 1 when x1=0.3mm, x2=0.8mm and x3=292K and (b) temperature distribution of dry- machining cutting tool The simulation results show that the lowest temperature achieved is 388.102K when the level of the space is highest; the channel diameter is at the highest; meanwhile the cooling fluid temperature is at the lowest.
The simulation result for cutting temperature from experimental design is analysed statistically resulting in 6-term regression model (Eq.2).
The simulation results denote that internally cooled cutting tool can reduce cutting temperature to more than 50°C compared to dry- machining.
Online since: July 2011
Authors: Yue Chao Wang, Wei Jun Liu, Yuan Kong
By this way we can obtain more precise results of numerical simulation.
Xiao-Feng Shang. in: Numerical simulation of temperature field on lasermetal deposition shaping [J].LASER TECHNOLOGY,(2007) (in Chinese)
Journal of materials science.(2003) [17] IBARRA-MEDINA J, PINKERTON A. in: A CFD model of the laser, coaxial powder stream and substrate interaction in laser cladding [J].
Physics Procedia, (2010) [18] QI H, MAZUMDER J, KI H. in: Numerical simulation of heat transfer and fluid flow in coaxial laser cladding process for direct metal deposition [J].
Optics and Lasers in Engineering, (2004) [20] Risheng, Long Weijun Liu, Fei Xing, Huabing Wang. in: Numerical simulation of thermal behaviour during laser metal deposition shaping.
Xiao-Feng Shang. in: Numerical simulation of temperature field on lasermetal deposition shaping [J].LASER TECHNOLOGY,(2007) (in Chinese)
Journal of materials science.(2003) [17] IBARRA-MEDINA J, PINKERTON A. in: A CFD model of the laser, coaxial powder stream and substrate interaction in laser cladding [J].
Physics Procedia, (2010) [18] QI H, MAZUMDER J, KI H. in: Numerical simulation of heat transfer and fluid flow in coaxial laser cladding process for direct metal deposition [J].
Optics and Lasers in Engineering, (2004) [20] Risheng, Long Weijun Liu, Fei Xing, Huabing Wang. in: Numerical simulation of thermal behaviour during laser metal deposition shaping.
Online since: December 2012
Authors: Samad Zahurin, A.B. Husaini, K. Anam, M.R. Arshad
Overshoots reproduced by the model simulation output are considered to have the same actual overshoots produced by step response input.
Thus, the simulation models closely follow the actual response of the thruster system.
Garcia Cena, Cesar Alvarez Arocha, Rafael Aracil Santonja: Experiences and results from designing and developing a 6 DoF underwater parallel robot, Robotics and Autonomous Systems, Volume 59. ( 2011) [4] Muhamad Husaini, Zahurin Samad, and Mohd Rizal Arshad: CFD Simulation of Cooperative AUV Motion, Indian Journal of Marine Science (IJMS), Vol.38(3). (2009) [5] Wei Wu, Da-Wei Jhao, Control of a direct internal reforming molten carbonate fuel cell system using wavelet network-based Hammerstein models, Journal of Process Control, Volume 22. (2012) [6] Luigi Piroddi, Marcello Farina, Marco Lovera, Black box model identification of nonlinear input–output models: A Wiener–Hammerstein benchmark, Control Engineering Practice.(2012) [7] Necla Togun, Sedat Baysec, Tolgay Kara, Nonlinear modeling and identification of a spark ignition engine torque, Mechanical Systems and Signal Processing, Volume 26.(2012) [8] J.
Thus, the simulation models closely follow the actual response of the thruster system.
Garcia Cena, Cesar Alvarez Arocha, Rafael Aracil Santonja: Experiences and results from designing and developing a 6 DoF underwater parallel robot, Robotics and Autonomous Systems, Volume 59. ( 2011) [4] Muhamad Husaini, Zahurin Samad, and Mohd Rizal Arshad: CFD Simulation of Cooperative AUV Motion, Indian Journal of Marine Science (IJMS), Vol.38(3). (2009) [5] Wei Wu, Da-Wei Jhao, Control of a direct internal reforming molten carbonate fuel cell system using wavelet network-based Hammerstein models, Journal of Process Control, Volume 22. (2012) [6] Luigi Piroddi, Marcello Farina, Marco Lovera, Black box model identification of nonlinear input–output models: A Wiener–Hammerstein benchmark, Control Engineering Practice.(2012) [7] Necla Togun, Sedat Baysec, Tolgay Kara, Nonlinear modeling and identification of a spark ignition engine torque, Mechanical Systems and Signal Processing, Volume 26.(2012) [8] J.
Online since: February 2013
Authors: Zhi Feng Xiao, Xing Bao, Nan Xing Wu
Sunun: Axial gas and solids mixing in a down flow circulating fluidized bed reactor based on CFD simulation.
Liu: Numerical simulation on superheated steam fluidized bed drying II.
Experiments and numerical simulation.
Liu: Numerical simulation on superheated steam fluidized bed drying II.
Experiments and numerical simulation.
Online since: July 2015
Authors: A.K.M. Mohiuddin
The chemical reaction simulation used the assumption of a plug flow reactor.
Mechanical Simulation.
Chemical Simulation.
Simulation of Catalytic Converter Performance.
Hence CFD analysis is used to design efficient catalytic converters.
Mechanical Simulation.
Chemical Simulation.
Simulation of Catalytic Converter Performance.
Hence CFD analysis is used to design efficient catalytic converters.
Online since: December 2009
Authors: Dong Mei Jiao
According to finite
element simulation, this kind of inlet profile suits the flow field characteristic of air flow.
Hydraulic model Three-dimensional transport equation Applicable for three-dimensional model Table 2 Boundary conditions and solution type analysis in finite element simulation Working condition analysis of flow field.
Flow filed simulation in different throat flow area.
Through finite element simulation, the critical ratio when maximum opening angle is same as when opening angle is minimum, and the gas velocity also achieves supersonic speed.
Computation Fluid Dynamics Analysis: Principle and Application of CFD Software [M].Beijing: Tsinghua University Press, 2004
Hydraulic model Three-dimensional transport equation Applicable for three-dimensional model Table 2 Boundary conditions and solution type analysis in finite element simulation Working condition analysis of flow field.
Flow filed simulation in different throat flow area.
Through finite element simulation, the critical ratio when maximum opening angle is same as when opening angle is minimum, and the gas velocity also achieves supersonic speed.
Computation Fluid Dynamics Analysis: Principle and Application of CFD Software [M].Beijing: Tsinghua University Press, 2004
Online since: January 2012
Authors: Zhu He, Wei Xiong, Guo Qiang Wang
Optimization of Flow Control Device in 300,000t Heavy-duty Casting and Forging CCM Tundish
Xiong Wei1,a, He Zhu1 and Wang Guoqiang1
1Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
axiongwei@wust.edu.cn
Keywords: tundish; flow control device; optimization; numerical simulation
Abstract.
With the rapid development of computer technology, numerical simulation has higher accuracy and become an importance means for engineering equipment design and process optimization[4-6].
In this paper, numerical simulation of molten steel flow in 300,000t heavy-duty casting and forging CCM tundish is developed based on the Fluent.
Computational Method Mathematical model is developed by differential equations and boundary conditions, and the phenomena of fluid flow in tundish are simulated by the CFD software of Fluent.
The number of grid is about 200,000 in the numerical simulation.
With the rapid development of computer technology, numerical simulation has higher accuracy and become an importance means for engineering equipment design and process optimization[4-6].
In this paper, numerical simulation of molten steel flow in 300,000t heavy-duty casting and forging CCM tundish is developed based on the Fluent.
Computational Method Mathematical model is developed by differential equations and boundary conditions, and the phenomena of fluid flow in tundish are simulated by the CFD software of Fluent.
The number of grid is about 200,000 in the numerical simulation.
Online since: August 2010
Authors: Jun Peng Shao, Bo Wu, Zhong Wen Wang, Zhi Huang, Chong Li, Chao Yin
The simulation results show that there is negative pressure at the
entrance of spindle rotation direction.
The simulation results can reflect the flow law of internal flow field of the middle pillow.
The velocity and pressure distribution of journal bearings under turbulent condition were analyzed by using CFD techniques.
The simulation curve can be got through uniformly taking nine spindle speeds among 240r/min and 480r/min.
Zhang: Computer Simulation Vol. 22 (2005), p. 283-285
The simulation results can reflect the flow law of internal flow field of the middle pillow.
The velocity and pressure distribution of journal bearings under turbulent condition were analyzed by using CFD techniques.
The simulation curve can be got through uniformly taking nine spindle speeds among 240r/min and 480r/min.
Zhang: Computer Simulation Vol. 22 (2005), p. 283-285
Online since: August 2013
Authors: Hai Bo Yang, Wen He Li, Hui Wang
Ansys simulation.
Simplify profile as two-dimensional model in the following simulation.
Simulation of temperature field and analysis of influencing factors for a square tube aluminum profile in spray cooling.
Research of effects of jet pressure and jet distance on H-beam temperature field by numerical simulation.
Computational Fluid Dynamics-CFD Software Principle and Application .
Simplify profile as two-dimensional model in the following simulation.
Simulation of temperature field and analysis of influencing factors for a square tube aluminum profile in spray cooling.
Research of effects of jet pressure and jet distance on H-beam temperature field by numerical simulation.
Computational Fluid Dynamics-CFD Software Principle and Application .