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Online since: November 2014
Authors: M. Fadhil, M.S. Aris, A.H. Abbas, A.B.A. Ibrahim, N. Aniza
It was shown that the CFD simulations managed to predict the hydrodynamic behavior of gas and solid fluidized bed reasonably well.
They concluded that CFD models appear to have potential for design and development work of the fluidized bed combustor and provided further development on the currently implemented CFD model is carried out.
Simulation parameters Table 2.
Liu, “CFD simulation of hydrodynamic characteristics in a multiple-spouted bed,” Chemical Engineering Science, vol. 80, 2012, pp. 365–379
[12] Mahdi Hamzehei, “CFD Modeling and Simulation of Hydrodynamics in a Fluidized Bed Dryer with Experimental Validation,” International Scholar Research Network ISRN Mechanical Engineering, 2011, Article 1D 131087
They concluded that CFD models appear to have potential for design and development work of the fluidized bed combustor and provided further development on the currently implemented CFD model is carried out.
Simulation parameters Table 2.
Liu, “CFD simulation of hydrodynamic characteristics in a multiple-spouted bed,” Chemical Engineering Science, vol. 80, 2012, pp. 365–379
[12] Mahdi Hamzehei, “CFD Modeling and Simulation of Hydrodynamics in a Fluidized Bed Dryer with Experimental Validation,” International Scholar Research Network ISRN Mechanical Engineering, 2011, Article 1D 131087
Online since: September 2011
Authors: Wen Bin Sun
Numerical Analysis of fluid-structure interaction of Frame structure considering the impact of turbulent wind load
Sun WenBin1,a
1School of Civil Engineering and Architecture, Liaoning Technical University, FuXin 123000 CHINA
alnfxswb@sina.com
Keywords: fluid-solid coupling, frame structure, turbulent, numerical simulation
Abstract.
According to the basic principle of CFD simulation and methods, a framework structure was studied for its vortex-induced vibration and control principle of around the flow field, it revealed the characteristics of vortex-induced vibration and rules, systematically studied frame structure fluid-solid coupling effect and the flow field active control methods and mechanism.
Along with the development of improving the theory of fluid dynamics and computational fluid dynamics (CFD) method, which make it possible, that application of CFD method making use of computer simulation of fluid-structure coupled vibration.
Numerical Method and Implementation In the numerical simulation of wind engineering, When using the simplified method - the Reynolds-averaged model approach,Turbulence model plays a very important role in the method.
Ningbo. (2004) ,p456-462 [4] Assmoah.F: Discrete Wavelet Analysis of Signal [J], International Journal of Engineering Education. (1999), 36 :255-264 [5] Houchuan Liang, Yong-Lin Zhang: STATIONARY Numerical Simulation of random processes [J].
According to the basic principle of CFD simulation and methods, a framework structure was studied for its vortex-induced vibration and control principle of around the flow field, it revealed the characteristics of vortex-induced vibration and rules, systematically studied frame structure fluid-solid coupling effect and the flow field active control methods and mechanism.
Along with the development of improving the theory of fluid dynamics and computational fluid dynamics (CFD) method, which make it possible, that application of CFD method making use of computer simulation of fluid-structure coupled vibration.
Numerical Method and Implementation In the numerical simulation of wind engineering, When using the simplified method - the Reynolds-averaged model approach,Turbulence model plays a very important role in the method.
Ningbo. (2004) ,p456-462 [4] Assmoah.F: Discrete Wavelet Analysis of Signal [J], International Journal of Engineering Education. (1999), 36 :255-264 [5] Houchuan Liang, Yong-Lin Zhang: STATIONARY Numerical Simulation of random processes [J].
Online since: December 2013
Authors: Guo Quan Tao, Ming Yun Lv, Jun Hui Meng, Ze Hai Wang
However, highly flexibility wing structure renders previous rigid model in aerodynamic simulation and ideal aerodynamic force distribution in structural simulation meet serious challenges.
The simulation result is compared with the result obtained using traditional unidirectional mapping method.
CFD Model and CSM Model.
The CFD and CSM models are showed in Fig. 1.
Thus provide more accurate simulation for high-aspect-ratio wings.
The simulation result is compared with the result obtained using traditional unidirectional mapping method.
CFD Model and CSM Model.
The CFD and CSM models are showed in Fig. 1.
Thus provide more accurate simulation for high-aspect-ratio wings.
Online since: March 2017
Authors: Jaque W. Scotton, Zardo Becker, Darci L. Savicki, Antonio Goulart
Demael and Carissimo [4] compared the performance of the Mercure_Saturne CFD model using the standard k-ε model and two Gaussian plume models in the case-neutral simulation of the Prairie Grass experiment.
Pontiggia et al [6] presented a technique for importing complex three-dimensional geometries from topographic databases to use them in CFD simulations and conducted a case study that considers the dispersion of ammonia in an urban perimeter.
Boundary conditions used in the simulation.
Strimaitis, CFD model simulation of dispersion from chlorine railcar releases in industrial and urban areas, Atmospheric Environment 43 (2009) 262-270
Abbasi, CFD-based simulation of dense gas dispersion in presence of obstacles, Journal of Loss Prevention in the Process Industries 24 (2011) 371-376
Pontiggia et al [6] presented a technique for importing complex three-dimensional geometries from topographic databases to use them in CFD simulations and conducted a case study that considers the dispersion of ammonia in an urban perimeter.
Boundary conditions used in the simulation.
Strimaitis, CFD model simulation of dispersion from chlorine railcar releases in industrial and urban areas, Atmospheric Environment 43 (2009) 262-270
Abbasi, CFD-based simulation of dense gas dispersion in presence of obstacles, Journal of Loss Prevention in the Process Industries 24 (2011) 371-376
Online since: September 2023
Authors: Toshiki Hirogaki, Shih Pang Tsai, Wei Wu, Eiichhi Aoyama, Hiroyoshi Sota
Accuracy comparison with CFD simulation.
Fig. 6 CFD analysis model and calculation example The simulation shows same conditions to experiment.
The Fig. 6(a) shows grid configuration and other conditions, and Fig. 6(b) shows one of the examples of simulation result.
The effectiveness of proposed CFD estimated method also can be demonstrated.
(3) From the simulation results of CFD based on porous material element, it can be confirmed that the results are very close to the experimental results.
Fig. 6 CFD analysis model and calculation example The simulation shows same conditions to experiment.
The Fig. 6(a) shows grid configuration and other conditions, and Fig. 6(b) shows one of the examples of simulation result.
The effectiveness of proposed CFD estimated method also can be demonstrated.
(3) From the simulation results of CFD based on porous material element, it can be confirmed that the results are very close to the experimental results.
Online since: February 2014
Authors: Hai Jun Qiao, Jia Nan Wu
In this study, simulation analysis to the automotive air conditioning absorption cold source, the vehicle speed and nozzles are proceeding.
In this study, CFD simulation for automotive air conditioning absorption cold source simulation is carried out, and the contrast of flow field and concentration distribution in packing-absorber with non-packing absorber lays the foundation for the key technical issues and its practical application of absorption cold source for automotives.
Simulation Model.
AutoCAD software and some CFD pre-processing software are used to draw the model and grids of the two-dimensional flow field of inner absorber.
In CFD software, unsteady-state, the implicit pressure-based solver, and k-epsilon turbulence model using two-equation model were adopted.
In this study, CFD simulation for automotive air conditioning absorption cold source simulation is carried out, and the contrast of flow field and concentration distribution in packing-absorber with non-packing absorber lays the foundation for the key technical issues and its practical application of absorption cold source for automotives.
Simulation Model.
AutoCAD software and some CFD pre-processing software are used to draw the model and grids of the two-dimensional flow field of inner absorber.
In CFD software, unsteady-state, the implicit pressure-based solver, and k-epsilon turbulence model using two-equation model were adopted.
Online since: September 2015
Authors: Amine Benmoussa, Lakhdar Rahmani, Mebrouk Rebhi
Numerical Study of Fluid Behavior Induced by Anchor Impeller in a Stirred Vessel
AMINE Benmoussaa*, LAKHDAR Rahmanib and MEBROUK Rebhic
ENERGARID Laboratory, University of Bechar, BP417, Bechar 08000, ALGERIA
*abenmoussa.a@hotmail.fr, brahmani_l1@yahoo.fr, cmerebhi@yahoo.fr
Keywords: Agitated vessel, Anchor impeller, Laminar flow, yield stress, Finite Volume Method, CFD.
In the present paper, we have described in-depth numerical study of the basic fluid mechanics problem of yield stress fluid flow with regularization model of Berovier and Engelman in a cylindrical vessel not chicaned equipped with an anchor stirrer by using computational fluid dynamics (CFD) based on the finite volumes method discretization of Navier - Stokes equations formulated in variables (U.V.P).
Nowadays, computer simulation of mixing flow (CFD) in the vessel is widely used to optimize the stirrer geometries and to get a better insight into the complex flow patterns produced by the interaction between the impeller, the tank internals, and the vessel wall [2].The capability of CFD tools to forecast the mixing behavior in terms of mixing times, power consumption, flow pattern and velocity profiles is considered as a successful achievement of these methods and acceptable results have been obtained [4].
Stirred system Fluid model To study the yield stress fluids which constitute the purpose of this paper, mixing systems are dealt with by numerical simulation.
In the regions where the material behaves like a rigid solid, and in the regions where the material flow with an apparent viscosity [5]: (5) The major difficulty with the constitutive equation (1) and (2) when used for numerical simulation is the discontinuity associated with infinite value of the viscosity whenapproaches τ0.
In the present paper, we have described in-depth numerical study of the basic fluid mechanics problem of yield stress fluid flow with regularization model of Berovier and Engelman in a cylindrical vessel not chicaned equipped with an anchor stirrer by using computational fluid dynamics (CFD) based on the finite volumes method discretization of Navier - Stokes equations formulated in variables (U.V.P).
Nowadays, computer simulation of mixing flow (CFD) in the vessel is widely used to optimize the stirrer geometries and to get a better insight into the complex flow patterns produced by the interaction between the impeller, the tank internals, and the vessel wall [2].The capability of CFD tools to forecast the mixing behavior in terms of mixing times, power consumption, flow pattern and velocity profiles is considered as a successful achievement of these methods and acceptable results have been obtained [4].
Stirred system Fluid model To study the yield stress fluids which constitute the purpose of this paper, mixing systems are dealt with by numerical simulation.
In the regions where the material behaves like a rigid solid, and in the regions where the material flow with an apparent viscosity [5]: (5) The major difficulty with the constitutive equation (1) and (2) when used for numerical simulation is the discontinuity associated with infinite value of the viscosity whenapproaches τ0.
Online since: August 2017
Authors: C.P. Karthikeyan, Natarajan Gobinath
Experiments and Computational Fluid Dynamics (CFD) tool are used for analyzing the effects of thermophoresis and diffusiophoresis on the heat transfer enhancement process.
Numerical simulation results for temperature distribution are validated using experimental readings.
Thermophoretic velocity outputs derived from numerical simulation show significant movement of nano particles very close to realistic values.
The first approach considers Lagrangian statistics with Direct Numerical Simulation (DNS).
The density and thermal conductivity of the nanofluid were closely predicted to the experimental results reported in the literature by the CFD.
Numerical simulation results for temperature distribution are validated using experimental readings.
Thermophoretic velocity outputs derived from numerical simulation show significant movement of nano particles very close to realistic values.
The first approach considers Lagrangian statistics with Direct Numerical Simulation (DNS).
The density and thermal conductivity of the nanofluid were closely predicted to the experimental results reported in the literature by the CFD.
Online since: May 2011
Authors: Xing Qian Peng, Kun Shao, Zhi Fei Gao
This paper adopts the method combining wind tunnel test and numerical simulation, using CFD software to establish the representative building model of round monolayer Earth Building and get the wind load characteristics in different wind direction.
Therefore numerical simulation result is credible, and it is feasible to take CFD simulation technology used in the study of Hakka Earth Building wind load characteristics.
Computer simulation of wind environmental conditions around buildings [J].
Civil Engineering CFD Simulation of Parameters Settings[C].
Evolution of CFD software from academic code to practical engineering software[J].Journal of Wind Engineering and Industrial Aerodynamics,1999,81
Therefore numerical simulation result is credible, and it is feasible to take CFD simulation technology used in the study of Hakka Earth Building wind load characteristics.
Computer simulation of wind environmental conditions around buildings [J].
Civil Engineering CFD Simulation of Parameters Settings[C].
Evolution of CFD software from academic code to practical engineering software[J].Journal of Wind Engineering and Industrial Aerodynamics,1999,81
Online since: October 2007
Authors: Bong Sun You, Jung Eui Lee, Chang Dong Yim
., Jeongja 27 Bundang Seongnam Gyeonggi 463-957, Korea
a
cdyim03@kmail.kimm.re.kr, bbsyou@kmail.kimm.re.kr, cjelee@expresslab.co.kr
Keywords: Magnesium alloy, Horizontal continuous casting, Solidification behavior, Simulation
Abstract.
The solidification behavior of AZ31 magnesium alloy plate during horizontal continuous casting (HCC) with constant velocity was analyzed by three-dimensional CFD simulation.
Recently computer-aided simulation is applied actively to evaluate the effect of processing variables on quality of product and to optimize the processing condition.
In this study, the solidification behavior of AZ31 magnesium alloy plate during horizontal continuous casting was analyzed as a function of processing variables by CFD simulation technique.
Simulation Procedure A commercial CFD package (Fluent) was used for simulation of solidification behavior during horizontal continuous casting.
The solidification behavior of AZ31 magnesium alloy plate during horizontal continuous casting (HCC) with constant velocity was analyzed by three-dimensional CFD simulation.
Recently computer-aided simulation is applied actively to evaluate the effect of processing variables on quality of product and to optimize the processing condition.
In this study, the solidification behavior of AZ31 magnesium alloy plate during horizontal continuous casting was analyzed as a function of processing variables by CFD simulation technique.
Simulation Procedure A commercial CFD package (Fluent) was used for simulation of solidification behavior during horizontal continuous casting.