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Online since: January 2014
Authors: D.V. Guzei, Alexander S. Lobasov, M.I. Pryazhnikov, Andrey V. Minakov
The possibility of its use for simulation of mini- and microchannel flow is shown in [7,8].
The temperature dependence of the water thermophysical properties was taken into account in the simulation.
The simulation of turbulence was conducted using the standard model Menter SST [28].
Dekterev, Simulation of flows in micromixers, Thermophysics & Aeromechanics (2010) 565-576
Minakov, Computer modelling of heat and mass transfer processes in microchannels using CFD-package SigmaFlow, Computer research and modeling (2012) 781-793
The temperature dependence of the water thermophysical properties was taken into account in the simulation.
The simulation of turbulence was conducted using the standard model Menter SST [28].
Dekterev, Simulation of flows in micromixers, Thermophysics & Aeromechanics (2010) 565-576
Minakov, Computer modelling of heat and mass transfer processes in microchannels using CFD-package SigmaFlow, Computer research and modeling (2012) 781-793
Online since: September 2014
Authors: Dian Kai Wang, Yan Ji Hong, Wei Zhao, Qian Li
Numerical simulation on air mass capture control of hypersonic inlet
by laser energy
Qian Li1,a, Yanji Hong1,b, Wei Zhao2,c, Diankai Wang1,d
1State Key Laboratory of Laser Propulsion & Application, Equipment Academy, Beijing 101416, China
2 No. 66292 Unit, Wu'an, Hebei 056341, China
aliqian827@sohu.com, bhongyanji@vip.sina.com, czhaowei861212@126.com, d274233405@qq.com
Keywords: hypersonic inlet; laser energy; virtual cowl; air mass capture ratio; numerical simulation
Abstract.
It can be seen that since three dimensional CFD program is adopted in this paper, high temperature layer is formed on the inlet wall for boundary layer effect, and the second and third shock is not clear enough, but the temperature agrees well with the reference[4].
It can be seen that since three dimensional CFD program is adopted in this paper, high temperature layer is formed on the inlet wall for boundary layer effect, and the second and third shock is not clear enough, but the temperature agrees well with the reference[4].
Online since: May 2011
Authors: Fu Lin Shen, Xu Liang Xie
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: September 2016
Authors: Sara Pezeshk
Computational Fluid Dynamics, CFD, analysis is conducted for ventilation purposes to analyze air flow in overall surface.
CFD delivers fast design iteration and parametric studies to achieving accurate air flow predictions robustly and reliably.
CFD analysis takes place for all the variations.
CFD analysis gives ability to evaluate the velocity and pressure by the wind created in the outer shell to achieve accurate airflow predictions robustly and reliably.
In every generation, ‘differentiation’ is created from the process of creating varieties using computational modeling and simulation, from a simple anticlastic Hyperbolic Paraboloid surface.
CFD delivers fast design iteration and parametric studies to achieving accurate air flow predictions robustly and reliably.
CFD analysis takes place for all the variations.
CFD analysis gives ability to evaluate the velocity and pressure by the wind created in the outer shell to achieve accurate airflow predictions robustly and reliably.
In every generation, ‘differentiation’ is created from the process of creating varieties using computational modeling and simulation, from a simple anticlastic Hyperbolic Paraboloid surface.
Online since: October 2014
Authors: Peng Sun, Zi Ye Ling, Zheng Guo Zhang, Tao Xu, Xiao Ming Fang, Xiao Hong Liu
Experimental Study and Numerical Simulation on Thermal Energy Storage Characteristics of Composite Phase Change Materials in Annular Space of Vertical Double-pipe Heat Exchanger
LIU Xiaohong1, a, LING Ziye2, b, SUN Peng2, c, FANG Xiaoming2, d, XU Tao2, e, ZHANG Zhengguo2, f *
1Automotive Department, Guangdong Industry Technical College, Guangzhou 510300, China.
2Key Laboratory of Enhanced Heat Transfer and Energy Conservation, the Ministry of Education, South China University of Technology, Guangzhou 510640, China
a1243360323@qq.com, bling.ziye@mail.scut.edu.cn, csun.peng@mail.scut.edu.cn, dcexmfang@scut.edu.cn, e xt771120@163.com, fcezhang68@163.com
Key words: Composite phase change material, Thermal storage, Expanded graphite, Numerical simulation
Abstract: Experimental system on thermal energy storage characteristics of phase change materials (PCMs) in annular space of a vertical double-pipe heat exchanger was set up.
The temperature fields of composite PCM in different time are obtained by numerical simulation method, the measured temperatures and simulation results are in good agreement.
Commercial Computational Fluid Dynamics (CFD) software FLUENT 5.6 is used to simulate the thermal storage process of composite PCMs.
Li, Experiment test of thermal conductivity coefficient and heat transfer simulation analysis of fatty acids phase change materials, Journal of Functional Materials, 43(2012) 1950-1954,1959
The temperature fields of composite PCM in different time are obtained by numerical simulation method, the measured temperatures and simulation results are in good agreement.
Commercial Computational Fluid Dynamics (CFD) software FLUENT 5.6 is used to simulate the thermal storage process of composite PCMs.
Li, Experiment test of thermal conductivity coefficient and heat transfer simulation analysis of fatty acids phase change materials, Journal of Functional Materials, 43(2012) 1950-1954,1959
Online since: May 2011
Authors: Chun Yan Gao, Lin Wang, Kun Feng Liang
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: 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: November 2011
Authors: Yan Jin, Hong Yu Li, Zhi Bing Tian
Numerical Simulation of Flow-induced Wall Shear Stress of a one strand Tundish Design
Zhibing Tian1,a, Yan Jin1,b, Hongyu Li1,c
1 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education
Wuhan University of Science and Technology
Wuhan 430081, P.
China azhibingtian2011@163.com, bjinyan203558@yahoo.com.cn, clihongyu861214@163.com Keywords: Tundish, Numerical Simulation, Wall Shear Stress, Service Life Abstract: In this paper, the flow-induced wall shear stress on the wall of a one Strand tundish has been computed by a 3-D mathematical model.
Based on the computational fluid dynamics (CFD) ,the mathematical model of the tunish are built in this paper ,and the wall shear stress of the tundish, which has 12 schemes with different layout of the flow control devices(weir, dam), are calculated.
China azhibingtian2011@163.com, bjinyan203558@yahoo.com.cn, clihongyu861214@163.com Keywords: Tundish, Numerical Simulation, Wall Shear Stress, Service Life Abstract: In this paper, the flow-induced wall shear stress on the wall of a one Strand tundish has been computed by a 3-D mathematical model.
Based on the computational fluid dynamics (CFD) ,the mathematical model of the tunish are built in this paper ,and the wall shear stress of the tundish, which has 12 schemes with different layout of the flow control devices(weir, dam), are calculated.
Online since: August 2012
Authors: Zhen Bin Gao, Feng Tian, Yi Cai Sun
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.