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Online since: November 2015
Authors: Daniela Popescu, Octavian Lalu, J. Dusica Pesic, Valeriu Panaitescu, Ion Anghel, Silviu Codescu
FDS is a popular computational fluid dynamics (CFD) tool in fire related researches [5].
The most important input variable to fire simulations is the evolution of heat release rate (HRR) with time [7].
The process was followed by a computerized simulation using PyroSim software (the graphic interface for FDS).
Anghel, Contribution on fire modelling and simulation through numerical method, doctoral thesis, Petroleum-Gas University of Ploieşti, 2009, pp. 10
Panaitescu, Modelling and simulation of ventilation in fire emergency situation, Computational Civil Engineering, 2008, Iaşi, pp. 421-429
The most important input variable to fire simulations is the evolution of heat release rate (HRR) with time [7].
The process was followed by a computerized simulation using PyroSim software (the graphic interface for FDS).
Anghel, Contribution on fire modelling and simulation through numerical method, doctoral thesis, Petroleum-Gas University of Ploieşti, 2009, pp. 10
Panaitescu, Modelling and simulation of ventilation in fire emergency situation, Computational Civil Engineering, 2008, Iaşi, pp. 421-429
Online since: May 2011
Authors: Xu Liang Xie, Fu Lin Shen
In order to verify thermal comfort of a four-ducted air-conditioning system equipped on a 12-meter-long highway sleeper coach, the thermal environment inside the compartment was numerical investigated with Computational Fluid Dynamics (CFD).
The influence of solar radiation was considered in simulation.
The commercial code Fluent was used for simulation.
Overall, the temperature of simulation is higher than that of experiment, and feet temperature is relatively high.
The influence of solar radiation was considered in simulation.
The commercial code Fluent was used for simulation.
Overall, the temperature of simulation is higher than that of experiment, and feet temperature is relatively high.
Online since: August 2011
Authors: Kai Cheng, Li Yan, Guang Ming Li, Jie Tang
According to the actual condition select four different pressure value simulation,such as shown in table 1.
The simulation field of automotive redirector as the export connected pumping:the inlet pressure Ps =700000Pa,the outlet pressure Ps=-90000Pa flow field simulation results as shown in figure 3, 4, 5.
Auto power steering gear flow channel model simulation numerical results provide a basis for ejector designing.
References [1] Zhanzhong Han , Jing Wang Fluid engineering simulation calculation examples and applications Beijing Institute of Technology Press 2004.
(In Chinese) [3] Desheng Zhang , Jiyu Zhao Flow field analysis and structure optimization of peach shaped chamber hydrodynamic coupling based on CFD China university of mining and technology journal 2010 687-692.
The simulation field of automotive redirector as the export connected pumping:the inlet pressure Ps =700000Pa,the outlet pressure Ps=-90000Pa flow field simulation results as shown in figure 3, 4, 5.
Auto power steering gear flow channel model simulation numerical results provide a basis for ejector designing.
References [1] Zhanzhong Han , Jing Wang Fluid engineering simulation calculation examples and applications Beijing Institute of Technology Press 2004.
(In Chinese) [3] Desheng Zhang , Jiyu Zhao Flow field analysis and structure optimization of peach shaped chamber hydrodynamic coupling based on CFD China university of mining and technology journal 2010 687-692.
Online since: October 2011
Authors: Xiao Dong Yu, Yong Hai Li, Xiu Li Meng, Bo Wu, Chun Li Gao, Zhi Xin Qiu, Yan Qin Zhang, Hui Jiang, Zhi Min Shi
LTD., Qiqihar Heilongjiang Province, China
aliyonghai59@Yahoo.com.cn, bxiawa-1972@163.com, chustyuxiaodong@163.com
Keywords: Constant flow, Hydrostatic center frame, Temperature field, Simulation research
Abstract.
In order to solve the thermal deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning temperature field of hydrostatic center frame is described.
The film lubrication characteristics of hydrostatic center frame directly affect the work of turning performance, reliability and longevity, therefore the temperature characteristics of the hydrostatic center frame was researched based on the theoretical analysis and numerical simulation in this paper.
Numerical simulation Model of bearing pillow.
Three-dimensional geometry model of the oil film is produced by software UG, then the model is introduced into the pre-processor ICEM CFD to generate grid.
In order to solve the thermal deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning temperature field of hydrostatic center frame is described.
The film lubrication characteristics of hydrostatic center frame directly affect the work of turning performance, reliability and longevity, therefore the temperature characteristics of the hydrostatic center frame was researched based on the theoretical analysis and numerical simulation in this paper.
Numerical simulation Model of bearing pillow.
Three-dimensional geometry model of the oil film is produced by software UG, then the model is introduced into the pre-processor ICEM CFD to generate grid.
Online since: June 2008
Authors: Kyung Seok Song, Jae Yeol Kim, Hyo Hee Chung, Myung Seok Ko, Seung Hyun Chol
Simulation technique of screw that is
used in extrusion molding has become so far various.
Therefore in this treatise analyzed heat and flow special quality of screw considering pressure, temperature distribution using three-dimensional finite element method (CFD). 1.
[6] J.B Yoon, "Simulation of Heat and Fluid Flow in the Single Screw Extruder with Coupling of the Metering Section and Die", 2000 [7] J.Y Yoon, Y.K Hwang, J.S Park, T.J Ko and J.W Park "An Integrated CAD System for Design of Extruder Screw" Journal of Korean Society of Precision Engineering Vol. 19, No. 8 , 2002
Therefore in this treatise analyzed heat and flow special quality of screw considering pressure, temperature distribution using three-dimensional finite element method (CFD). 1.
[6] J.B Yoon, "Simulation of Heat and Fluid Flow in the Single Screw Extruder with Coupling of the Metering Section and Die", 2000 [7] J.Y Yoon, Y.K Hwang, J.S Park, T.J Ko and J.W Park "An Integrated CAD System for Design of Extruder Screw" Journal of Korean Society of Precision Engineering Vol. 19, No. 8 , 2002
Online since: March 2013
Authors: Yi Bing Liu
Abstract: In this paper, a simulation of three kinds of micro-groove plate heat pipes--- rectangular; trapezoidal and triangular, is conducted by thermal analysis software ANSYS.
In the micro channel plate heat pipe simulation, the following assumptions are made: ① refrigerant vapor is saturated ideal gas; ② start performance and 30 seconds to reach steady state; the ambient temperature and the boundary conditions do not change over time; ③ heat contact surface is boundary heat flux density; ④ ignored components of the contact resistance between the contact surfaces; ⑤ material uniformly continuous; ⑥ only consider the axial heat pipe cooling.
As ICEM CFD Tetra tetrahedral mesh device has a powerful mesh smoothing algorithm, and the local adaptation algorithm for encryption and rough, so by the use of Tetra8 tree algorithm, the volume is filled with tetrahedral prism and tetrahedral hybrid mesh ( free grid) is generated .
Using POST1, draw the temperature cloud and the temperature vector when it is 35 seconds and heating power is 30W, as shown in Figure 5, Figure 6 Fig 5 Temperature cloud of three kinds of micro-groove heat pipes Fig 6 Temperature vector of three kinds of micro-groove heat pipes Simulation results and analysis In this paper, the Simulation is under the condition of at room temperature 18 ℃; filling rate of 1.3; horizontal; running for 30 seconds after the heat pipe thermal equilibrium.
Conclusion In this paper, using ANSYS thermal analysis software and doing contrasting simulation of three kinds of micro-groove structure channel plate heat pipe, we can draw the following conclusions: Among the heat transfer performances of three micro-groove structure, the trapezoid structure of the flat heat pipe has the best heat transfer characteristics, followed by rectangular structure, the last is triangular structure.
In the micro channel plate heat pipe simulation, the following assumptions are made: ① refrigerant vapor is saturated ideal gas; ② start performance and 30 seconds to reach steady state; the ambient temperature and the boundary conditions do not change over time; ③ heat contact surface is boundary heat flux density; ④ ignored components of the contact resistance between the contact surfaces; ⑤ material uniformly continuous; ⑥ only consider the axial heat pipe cooling.
As ICEM CFD Tetra tetrahedral mesh device has a powerful mesh smoothing algorithm, and the local adaptation algorithm for encryption and rough, so by the use of Tetra8 tree algorithm, the volume is filled with tetrahedral prism and tetrahedral hybrid mesh ( free grid) is generated .
Using POST1, draw the temperature cloud and the temperature vector when it is 35 seconds and heating power is 30W, as shown in Figure 5, Figure 6 Fig 5 Temperature cloud of three kinds of micro-groove heat pipes Fig 6 Temperature vector of three kinds of micro-groove heat pipes Simulation results and analysis In this paper, the Simulation is under the condition of at room temperature 18 ℃; filling rate of 1.3; horizontal; running for 30 seconds after the heat pipe thermal equilibrium.
Conclusion In this paper, using ANSYS thermal analysis software and doing contrasting simulation of three kinds of micro-groove structure channel plate heat pipe, we can draw the following conclusions: Among the heat transfer performances of three micro-groove structure, the trapezoid structure of the flat heat pipe has the best heat transfer characteristics, followed by rectangular structure, the last is triangular structure.
Online since: July 2011
Authors: Victor Hugo Hidalgo Diaz, Ning Chen
(b) Simulation, in this is possible to see the changes of temperature.
The commercial Computational Fluid Dynamics software (COMSOL or FLUENT) will be used for the 3D numerical simulation.
From the Fluid Mechanics analysis, the vortex is a complex system, for this reason the CFD analysis of a model-scale Atmospheric Vortex Engine (AVE) is necessary.
Future studies should include the CFD analysis because this paper is a brief analysis of AVE.
Numerical simulation of forced wakes around a cylinder wakes [J].Heat and Fluid Flow, 1995(16):327-332
The commercial Computational Fluid Dynamics software (COMSOL or FLUENT) will be used for the 3D numerical simulation.
From the Fluid Mechanics analysis, the vortex is a complex system, for this reason the CFD analysis of a model-scale Atmospheric Vortex Engine (AVE) is necessary.
Future studies should include the CFD analysis because this paper is a brief analysis of AVE.
Numerical simulation of forced wakes around a cylinder wakes [J].Heat and Fluid Flow, 1995(16):327-332
Online since: August 2012
Authors: Yi Cai Sun, Zhen Bin Gao, Feng Tian
Through numerical simulation, the temperature distribution of the sensor was investigated, under conditions of various flow velocities.
fluid heater wrapper D2 D1 Fig.1 The detector Pipe wall Flow inlet Heater Axis Flow outlet Thermistor Wrapper Fig. 2 Simulation model and mesh of the sensor Simulation Results Simulation of the sensor is done using Fluent in ANSYS CFD software.
The heat generation in the simulation model is defined as if a DC voltage is applied to the heater.
The simulation results for different specific heat generation rate show that the temperature of the detector increase with increasing Q as seen in Fig. 7.
The thermal properties, including thermal conductivity and heat power, and boundary conditions, such as flow velocity, the heating power, reference temperature, are examined in the simulations.
fluid heater wrapper D2 D1 Fig.1 The detector Pipe wall Flow inlet Heater Axis Flow outlet Thermistor Wrapper Fig. 2 Simulation model and mesh of the sensor Simulation Results Simulation of the sensor is done using Fluent in ANSYS CFD software.
The heat generation in the simulation model is defined as if a DC voltage is applied to the heater.
The simulation results for different specific heat generation rate show that the temperature of the detector increase with increasing Q as seen in Fig. 7.
The thermal properties, including thermal conductivity and heat power, and boundary conditions, such as flow velocity, the heating power, reference temperature, are examined in the simulations.
Online since: May 2011
Authors: Kun Feng Liang, Chun Yan Gao, Lin Wang
Optimization of operating parameters of liquid-liquid circulation fluidized bed for ice-making based on Exergy method
Liang Kunfeng1, a, Gao Chunyan1,b and Wang Lin1,c
1 Vehicle & Motive Power Engineering College, Henan University of science and technology,
Luoyang Henan China 471003
aliangkunf@163.com, bchunyanyn@163.com, cwanglinsichuan@163.com
Keywords: dynamic ice-making; direct contact heat transfer; exergy analysis; liquid-liquid circulating fluidized bed; multiphase flow and heat transfer; numerical simulation
Abstract.
Numerical simulation Governing equations.
This two-way coupling is accomplished by alternately solving the discrete and continuous phase equations until the solutions in both phases have stopped changing.Numerical modeling and simulation of the in LLCFB was conducted using a commercial CFD code, FLUENT, which is based on control volume approach.
Results and discussion Numerical experiments are performed based on numerical simulation plat developed in the sectionⅡ.
Numerical simulation Governing equations.
This two-way coupling is accomplished by alternately solving the discrete and continuous phase equations until the solutions in both phases have stopped changing.Numerical modeling and simulation of the in LLCFB was conducted using a commercial CFD code, FLUENT, which is based on control volume approach.
Results and discussion Numerical experiments are performed based on numerical simulation plat developed in the sectionⅡ.
Online since: July 2006
Authors: Roger Thiffault, Steve CockCroft, Daan M. Maijer, André Larouche, Malcom Lane, Massimo DiCiano
Horizontal Direct Chill Casting Model
A coupled heat transfer - fluid flow model of steady-state T-ingot HDC casting is being developed
using the commercial computational fluid dynamics (CFD) software, CFX [8].
Conclusion A coupled heat transfer - fluid flow CFD model of the HDC casting process is being developed to understand and gain insight into the HDC casting process.
[8] Ansys/CFX10 CFD software, www.ansys.com [9] W.
Ding, Simulation of Microporosity in A356 Aluminium Alloy Castings, International Journal of Cast Metals Research, Vol. 18, No. 4, 2005, p. 229-235
Conclusion A coupled heat transfer - fluid flow CFD model of the HDC casting process is being developed to understand and gain insight into the HDC casting process.
[8] Ansys/CFX10 CFD software, www.ansys.com [9] W.
Ding, Simulation of Microporosity in A356 Aluminium Alloy Castings, International Journal of Cast Metals Research, Vol. 18, No. 4, 2005, p. 229-235