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Online since: December 2012
Authors: Wei Wei Wu, Jin Guo Li, He He Zheng, Zhao Sheng Wu
Unlike the usual CFD analysis, the movement of this adjusting mechanism is closely related to the pressure field of fluid, so it must be coupled with CFD analysis to get meaningful results.
Coupled Fluid-Structure Interaction Simulation The work process analysis of variable displacement pump incorporates the rigid dynamics of the adjusting mechanism (or stator in vane pump) and the CFD of liquid [4], which are coupled together.
Coupled Simulation and Experiments The procedures of coupled fluid-structure simulation for variable displacement pump are as following: 1.
The valve has partially opened in experiments, which causes higher evaluation of flow in CFD simulations.
Numerical simulation of the variable displacement pump working process is a two-way coupled fluid-structure interaction, which includes structure dynamics and CFD analysis involving time-varying solution domain.
Coupled Fluid-Structure Interaction Simulation The work process analysis of variable displacement pump incorporates the rigid dynamics of the adjusting mechanism (or stator in vane pump) and the CFD of liquid [4], which are coupled together.
Coupled Simulation and Experiments The procedures of coupled fluid-structure simulation for variable displacement pump are as following: 1.
The valve has partially opened in experiments, which causes higher evaluation of flow in CFD simulations.
Numerical simulation of the variable displacement pump working process is a two-way coupled fluid-structure interaction, which includes structure dynamics and CFD analysis involving time-varying solution domain.
Online since: February 2014
Authors: Ming Hai Li, Guang Mei Shi, Shao Quan Hu, Zhong Li Zhang
Thus, this paper presents the simulation based on the computational fluid dynamics (CFD) simulation technology of kerosene pool fire scenario of various pool diameters in both stagnant air and cross-wind conditions.
Besides, for the small size pool, the values, respectively obtained with CFD simulation and Thomas Equation, were in good conformance.
While for bigger size pool, the flame height value obtained with CFD simulation was slightly higher than that obtained with the Thomas Equation (e.g. the value obtained with Eq.1 for the 3-meter-diameter kerosene pool was 5.47m, compared with 5.99m obtained with CFD simulation).
Comparatively, in accordance with the fitting Eq.3 of the CFD computation simulation, the calculating result of the flame tilt with a wind speed uw of 3.1m/s is 35.3°.
And the CFD simulated results is slightly lower.
Besides, for the small size pool, the values, respectively obtained with CFD simulation and Thomas Equation, were in good conformance.
While for bigger size pool, the flame height value obtained with CFD simulation was slightly higher than that obtained with the Thomas Equation (e.g. the value obtained with Eq.1 for the 3-meter-diameter kerosene pool was 5.47m, compared with 5.99m obtained with CFD simulation).
Comparatively, in accordance with the fitting Eq.3 of the CFD computation simulation, the calculating result of the flame tilt with a wind speed uw of 3.1m/s is 35.3°.
And the CFD simulated results is slightly lower.
Online since: January 2014
Authors: Jaswar Jaswar, C.L Siow, Efi Afrizal
Besides, simulation of fluid flow characteristic around rounded-shape FPSO was also conducted by A.
Jaswar et al were also developed an integrated CFD simulation software to analyse hull performance of VLCC tanker.
The integrated CFD simulation tool was developed based on potential theory and possess the capability to simulate wave profile, wave resistance and pressure distribution around a ship hull [8].
Simulation Result Pressure distribution, Cp with different Froude numbers (Fr) obtained from the CFD were shown in Fig. 3.
[12] C., Feichtingeret al., WaLBerla: HPC software design for computational engineering simulations.
Jaswar et al were also developed an integrated CFD simulation software to analyse hull performance of VLCC tanker.
The integrated CFD simulation tool was developed based on potential theory and possess the capability to simulate wave profile, wave resistance and pressure distribution around a ship hull [8].
Simulation Result Pressure distribution, Cp with different Froude numbers (Fr) obtained from the CFD were shown in Fig. 3.
[12] C., Feichtingeret al., WaLBerla: HPC software design for computational engineering simulations.
Online since: October 2014
Authors: Sun Bin, Jiu Ling Zhang
CFD simulation of capillary network radiation heating comfort
Bin Sun1, a, Jiuling Zhang2,b
1 Northeast Dianli University, Jilin, Jilin,China
2 Northeast Dianli University, Jilin, Jilin,China
aemail: sunbin@mail.nedu.edu.cn
bemail:805737552@qq.com
Keywords: capillary network radiation heating,comfort,CFD simulation.
According to the Airpak software,we perform a bedroom thermal environment CFD simulation when capillary network is in three different locations, from which,we get the temperature field, the velocity field and the PMV images.
Fig. 1 Physical model Mathematical models Turbulence models.In CFD technology, fluid flow to be governed by the law of the physical conservation, conservation law basically includes: the law of mass conservation, momentum conservation law, the law of conservation of energy and component conservation equation.
In CFD technology, fluid flow is governed by the physical conservation law, basic conservation law includes: mass conservation law, momentum conservation law, energy conservation law and component conservation equation.
[10] J.M.Diao,The CFD study of Capillary radiation air-conditioning system [D].
According to the Airpak software,we perform a bedroom thermal environment CFD simulation when capillary network is in three different locations, from which,we get the temperature field, the velocity field and the PMV images.
Fig. 1 Physical model Mathematical models Turbulence models.In CFD technology, fluid flow to be governed by the law of the physical conservation, conservation law basically includes: the law of mass conservation, momentum conservation law, the law of conservation of energy and component conservation equation.
In CFD technology, fluid flow is governed by the physical conservation law, basic conservation law includes: mass conservation law, momentum conservation law, energy conservation law and component conservation equation.
[10] J.M.Diao,The CFD study of Capillary radiation air-conditioning system [D].
Online since: May 2014
Authors: Kai Chung Wong, Tony Chen, David E. Connor, Kurosh Parsi, Masud Behnia
CFD Model.
The simulation was adjusted based on the experimental findings.
The simulations for a 0.5mL injection of velocities of 0.63, 2 and 6m/s were examined.
Additional simulation compared the blood as the alternative to saline.
The simulation results were then compared with the experimental results.
The simulation was adjusted based on the experimental findings.
The simulations for a 0.5mL injection of velocities of 0.63, 2 and 6m/s were examined.
Additional simulation compared the blood as the alternative to saline.
The simulation results were then compared with the experimental results.
Online since: August 2015
Authors: Abdulrahman Yousif, Azuraien Japper-Jaafar
The purpose of this simulation is validate experimental results that show unusual pressure drop behaviour.
Figure 1 – Flow Loop CFD simulation The geometry of the curved 90˚ bend has been modelled according to the dimensions of the elbow section of the flow loop; the dimensions were retrieved through both precise measurements and 3D scan of the section via three-dimensional photography.
Table 1 shows the physical equations used in the simulations.
This behaviour is investigated via CFD to confirm this result.
Conclusion According to the results for the experimental run and CFD simulation: · The CFD results are valid as they show similar pressure drop behaviour · The Experimental results are explainable by the behaviour seen from the CFD results, as it shows the relative static pressure across the pipe wall surface
Figure 1 – Flow Loop CFD simulation The geometry of the curved 90˚ bend has been modelled according to the dimensions of the elbow section of the flow loop; the dimensions were retrieved through both precise measurements and 3D scan of the section via three-dimensional photography.
Table 1 shows the physical equations used in the simulations.
This behaviour is investigated via CFD to confirm this result.
Conclusion According to the results for the experimental run and CFD simulation: · The CFD results are valid as they show similar pressure drop behaviour · The Experimental results are explainable by the behaviour seen from the CFD results, as it shows the relative static pressure across the pipe wall surface
Online since: December 2014
Authors: D.B. Santos, C.R. Duarte, M.A.S. Barrozo, B.C. Silvério, I.A. Resende
Studies of numerical simulation by CFD technique have become popular in the field of gas-solid flow, in several applications [12-14].
CFD simulation results of outlet air velocity at mini pipes in different configurations with incoming air velocity of 1.1 m/s.
CFD simulation results of air velocity at mini pipes in different configurations with inlet air velocity of 1.1 m/s.
CFD simulation results of air output speeds at mini pipes in 6 different configurations with different incoming air velocity (1.1, 2,5 and 3,9 m/s).
The results showed a good agreement between experimental data and CFD simulations.
CFD simulation results of outlet air velocity at mini pipes in different configurations with incoming air velocity of 1.1 m/s.
CFD simulation results of air velocity at mini pipes in different configurations with inlet air velocity of 1.1 m/s.
CFD simulation results of air output speeds at mini pipes in 6 different configurations with different incoming air velocity (1.1, 2,5 and 3,9 m/s).
The results showed a good agreement between experimental data and CFD simulations.
Online since: June 2010
Authors: Ming Gu, Xuan Yi Zhou, Ke Qin Yan
Keqin Yan [4] tried to simulate wind-drifted snow load on gable roof with CFD.
The velocity field got with wind rake in Tongji University [5]is adopted in CFD simulation.
The result of simulation is compared with that of outdoor test.
CFD simulation 3.1 Velocity distribution The test is carried out in Tongji University.
Parameters in the profile expressions 0z 1c K refZ refu H 0.00041 0.12 0.42 0.1 3.2 300 0.09 3.2 Result of simulation The velocity and pressure coefficient distributions were calculated with CFD.
The velocity field got with wind rake in Tongji University [5]is adopted in CFD simulation.
The result of simulation is compared with that of outdoor test.
CFD simulation 3.1 Velocity distribution The test is carried out in Tongji University.
Parameters in the profile expressions 0z 1c K refZ refu H 0.00041 0.12 0.42 0.1 3.2 300 0.09 3.2 Result of simulation The velocity and pressure coefficient distributions were calculated with CFD.
Online since: March 2014
Authors: Ke Xi, Chao Yan, Yu Huang, Wen Wang
Coupled CFD/GNC Modeling for the Basic Finner Projectile with Closed Loop
Ke Xi a, Chao Yanb, Yu Huangc and Wen Wangd
Beihang University, Beijing, China
acauchy86@163.com, byanchao@buaa.edu.cn, chuangyu@ase.buaa.edu.cn, dwangwenbuaa@126.com
Keywords: CFD, PID, Basic Finner, virtual flight simulation
Abstract.
CFD based virtual flight test (VFT) is such a technology which integrates multidisciplinary design method.
A virtual flight simulation platform has been developed by integrating multidisciplinary design technologies such as CFD, RBD and GNC.
Prediction of the unsteady behavior of maneuvering aircraft by CFD aerodynamic, flight-mechanic and aeroelastic coupling.
Relative motion simulations using an overset multimesh paradigm with Kestrel v3.
CFD based virtual flight test (VFT) is such a technology which integrates multidisciplinary design method.
A virtual flight simulation platform has been developed by integrating multidisciplinary design technologies such as CFD, RBD and GNC.
Prediction of the unsteady behavior of maneuvering aircraft by CFD aerodynamic, flight-mechanic and aeroelastic coupling.
Relative motion simulations using an overset multimesh paradigm with Kestrel v3.
Online since: August 2013
Authors: An Shik Yang, Ying Ming Su, Jen Hao Wu, Yu Hsuan Juan
CFD Simulations of Natural Ventilation Effect: A Case Study of New Administrative Building of the Guanyin Township
An-Shik Yang1,a, Jen-Hao Wu2 , Yu-Hsuan Juan3 and Ying-Ming Su4,b
1, 2, 3 Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan
4 Department of Architecture, National Taipei University of Technology, Taipei, Taiwan
a asyang@ntut.edu.tw, b ymsu@ntut.edu.tw
Keywords: Ventilation, performance simulator, wind environment, CFD
Abstract.
In order to study the relationship between air pollution dispersal and ventilation for the Arena Stadium in Amsterdam, Blocken et al. [2] made the simulations of the wind across the urban for determining the natural ventilation rate.
To evaluate the ventilation effectiveness by ACH in Eq. 1, the simulation results indicated that the flowfield attained in Case C showed much better ventilation performance.
Carmeliet, ‘’CFD simulation of the atmospheric boundary layer: wall function problems,’’ Atmospheric Environment, vol. 41, no. 2, 2007, pp 238-252
Hanby, ‘‘CFD modelling of natural displacement ventilation inan enclosure connected to an atrium,’’ Building and Environment, vol. 42(3), 2007, pp. 1158–1172
In order to study the relationship between air pollution dispersal and ventilation for the Arena Stadium in Amsterdam, Blocken et al. [2] made the simulations of the wind across the urban for determining the natural ventilation rate.
To evaluate the ventilation effectiveness by ACH in Eq. 1, the simulation results indicated that the flowfield attained in Case C showed much better ventilation performance.
Carmeliet, ‘’CFD simulation of the atmospheric boundary layer: wall function problems,’’ Atmospheric Environment, vol. 41, no. 2, 2007, pp 238-252
Hanby, ‘‘CFD modelling of natural displacement ventilation inan enclosure connected to an atrium,’’ Building and Environment, vol. 42(3), 2007, pp. 1158–1172