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Online since: January 2020
Authors: A.G. Barbosa de Lima, R. Lima Dantas, A.X. Mesquita de Queiroga, N. Lima Tresena, G. Santos de Lima, V.A. Agra Brandão, R. Araújo de Queiroz
In this sense, the aim of this work is to study the cooling and freezing process of cashew apple by CFD and experiments.
The computational mesh was generated in the ANSYS ICEM CFD software.
Table 1 - Thermophysical properties of the cashew apple used in the simulation.
The study was evaluated under the experimental and theoretical (CFD) point of views.
Techniques of Modeling, Simulation and Optimization of Cooling and Freezing Processes.
The computational mesh was generated in the ANSYS ICEM CFD software.
Table 1 - Thermophysical properties of the cashew apple used in the simulation.
The study was evaluated under the experimental and theoretical (CFD) point of views.
Techniques of Modeling, Simulation and Optimization of Cooling and Freezing Processes.
Online since: July 2014
Authors: A. Anoop, M. John Manu, M.P. Assiz
Bouquet, F. et al. (2001) [7] compares the thrust and specific impulse of igniters obtained from experimental analysis with numerical simulation.
Unstructured tetrahedral mesh is generated using ANSYS ICEM CFD.
CFD analysis is performed to obtain the fluid flow and mixing characteristics inside the each of the Igniter flow domains using ANSYS FLUENT 14.5.
Breussin, CFD Calculations on Hydrogen and Oxygen Combustion in Small Devices, 37th AIAA Joint Propulsion Conference, 2001-3712, (2001), pp. 1-9.
Unstructured tetrahedral mesh is generated using ANSYS ICEM CFD.
CFD analysis is performed to obtain the fluid flow and mixing characteristics inside the each of the Igniter flow domains using ANSYS FLUENT 14.5.
Breussin, CFD Calculations on Hydrogen and Oxygen Combustion in Small Devices, 37th AIAA Joint Propulsion Conference, 2001-3712, (2001), pp. 1-9.
Online since: August 2013
Authors: H. Cheng, L. Yu, Y. Zhang
A Numerical Simulation of Parachute Opening Process Based on ALE Method
Y.
Benny and Stein proposed the CFD/MSD (Mass Spring Damper) coupling model[2], which ignores the influence of fabric characteristics, and the research result had no test to verify.
Kim and Peskin[3] used Immersed Boundary (IB) method to simulate the three-dimensional parachute in finite mass situation, but this method is suitable for low Reynolds number simulation and has no structural results, such as fabric stress and so on.
Fig. 1 The finite element model In order to compare the simulation results with the experiment[9], the working conditions of calculation is shown in Table 1.
t=0 s t=0.48 s t=0.81 s t=0.99 s t=1.43 s t=2.23 s Fig.2 Calculation results Comparison of Experiment and Numerical Simulation.
Benny and Stein proposed the CFD/MSD (Mass Spring Damper) coupling model[2], which ignores the influence of fabric characteristics, and the research result had no test to verify.
Kim and Peskin[3] used Immersed Boundary (IB) method to simulate the three-dimensional parachute in finite mass situation, but this method is suitable for low Reynolds number simulation and has no structural results, such as fabric stress and so on.
Fig. 1 The finite element model In order to compare the simulation results with the experiment[9], the working conditions of calculation is shown in Table 1.
t=0 s t=0.48 s t=0.81 s t=0.99 s t=1.43 s t=2.23 s Fig.2 Calculation results Comparison of Experiment and Numerical Simulation.
Online since: March 2015
Authors: De Jian Li
Analysis on Numerical Simulation for Bionic Robot
Fish Based on CATIA
Dejian Li
School of Mechanical Engineering, Baicheng Normal College, Baicheng137000, China
bcldj @sohu.com
Key Words: Bionic; Tuna; Computational Fluid Dynamics; CATIA
Abstract: Based on the problem that there is a relatively small number of analog simulations on swimming of fish a in specific fluid conducted by science researchers, a simulated tuna model is established in this paper, in which CATIA is used to construct the streamline shape of simulated tuna and the method of computational fluid dynamics is utilized to simulate the swimming of tuna in marine environment.
Through several times of comparison and comprehensive consideration, tuna is selected as the object for shape simulation.
Simulation Analysis and Experimental Research on Movements of Biotic Fins[J].
CFD Simulation of Fish-like Body Moving in Viscous Liquid[J].Journal of Bionic Engineering,2006,3(3):147-153 [7] Wojciech Kowalczyk, Antonio Delgado.
Simulation of Fluid Flow in a Channel Induced by Three Types of Fin-Like Motion[J].
Through several times of comparison and comprehensive consideration, tuna is selected as the object for shape simulation.
Simulation Analysis and Experimental Research on Movements of Biotic Fins[J].
CFD Simulation of Fish-like Body Moving in Viscous Liquid[J].Journal of Bionic Engineering,2006,3(3):147-153 [7] Wojciech Kowalczyk, Antonio Delgado.
Simulation of Fluid Flow in a Channel Induced by Three Types of Fin-Like Motion[J].
Online since: October 2012
Authors: Yu Qing Zheng, Hui Xiang Yang, Hai Zhou Weng
The FE simulation analysis results were verified correct.
Structural crashworthiness analysis by computer simulation can effectively improve the product reliability, reduce the development cost, and enhance the market competitiveness of the product.
So in early design, the simulation work can play a greater role.
According to the simulation results, we suggest that increasing support after screen, increasing fillet in stress concentration of the plastic casing, thickening rib and other measures can greatly reduce damage of the screen and rib Fig. 8 Schematic diagram of packaging materials unit deformation Compared With Experiment Results From the above simulation analysis results, main problems of integrated machine lie in the screen and plastic frame.
Overcoming of Barrier between CAD and CFD by Modif -ied Finite Volume Method [M], Proc. 1998 ASME Pressure Vessels and Piping Division.
Structural crashworthiness analysis by computer simulation can effectively improve the product reliability, reduce the development cost, and enhance the market competitiveness of the product.
So in early design, the simulation work can play a greater role.
According to the simulation results, we suggest that increasing support after screen, increasing fillet in stress concentration of the plastic casing, thickening rib and other measures can greatly reduce damage of the screen and rib Fig. 8 Schematic diagram of packaging materials unit deformation Compared With Experiment Results From the above simulation analysis results, main problems of integrated machine lie in the screen and plastic frame.
Overcoming of Barrier between CAD and CFD by Modif -ied Finite Volume Method [M], Proc. 1998 ASME Pressure Vessels and Piping Division.
Online since: May 2012
Authors: Jian Fei Zhang, Kai Zhen Zhu, Shuang Jia, Xu Du, Li Juan Zhang
,LTD)
Keywords: Aerobic composting; Mechanical ventilation; Ammoniadistribution; Simulation and analysis
Abstract.
Based on measured ventilation condition in thebuiltaerobic composting plant of large sludge treatment engineering,usingthe methord of CFD, four kinds of scheme for the new aerobic composting plantwere analysed,which contain two types of ventilation(natural air supply mechanical exhaust and mechanical air mechanical ventilation)and two kinds of supply air rates (4x105m3/h and 8x105m3/h).
The object of this simulation is incompressible fluent.The pollutant of this plant mainly contain ammonia,which is a kind of complex turbulent motion[9],and obey the above governing equation.In this article,indoorzeroequation model will be taken to solve the problem[10].
Fig.1 Theary of ventilation Simulation The size of exhaust outlet is 0.5m×0.3m,and the exhaust rate is 1280m3/h per vent.The plant have 2 doors,which size is 6.5m×6m,and have 56 windows,which size is 0.6m×1.8m.According to the theory of pollutant diffusion and the structure of the plant,this simulation complete 4 cases,which content the former case,as shown in Table.1.Multivariant simulations are compared to analysis the spead of ammonia in different ventilate conditions,which can offer the optimized case of air current composition.
[10] Spengler J D,ChenQ.Indoor air quality factors in designing a healthy building.Annual Review of Energy and the Environment,2000,25:567601 [11]Aoyongan,Wangli,Numerical Simulation of Pollutant Diffusion Law in Bathroom and Optimization of the Locations and Ways of Exhaust Outlet and Makeup Air[J].Journal of Shenyang Jianzhu University(Natural Science),2011,4:56-60
Based on measured ventilation condition in thebuiltaerobic composting plant of large sludge treatment engineering,usingthe methord of CFD, four kinds of scheme for the new aerobic composting plantwere analysed,which contain two types of ventilation(natural air supply mechanical exhaust and mechanical air mechanical ventilation)and two kinds of supply air rates (4x105m3/h and 8x105m3/h).
The object of this simulation is incompressible fluent.The pollutant of this plant mainly contain ammonia,which is a kind of complex turbulent motion[9],and obey the above governing equation.In this article,indoorzeroequation model will be taken to solve the problem[10].
Fig.1 Theary of ventilation Simulation The size of exhaust outlet is 0.5m×0.3m,and the exhaust rate is 1280m3/h per vent.The plant have 2 doors,which size is 6.5m×6m,and have 56 windows,which size is 0.6m×1.8m.According to the theory of pollutant diffusion and the structure of the plant,this simulation complete 4 cases,which content the former case,as shown in Table.1.Multivariant simulations are compared to analysis the spead of ammonia in different ventilate conditions,which can offer the optimized case of air current composition.
[10] Spengler J D,ChenQ.Indoor air quality factors in designing a healthy building.Annual Review of Energy and the Environment,2000,25:567601 [11]Aoyongan,Wangli,Numerical Simulation of Pollutant Diffusion Law in Bathroom and Optimization of the Locations and Ways of Exhaust Outlet and Makeup Air[J].Journal of Shenyang Jianzhu University(Natural Science),2011,4:56-60
Online since: October 2013
Authors: Xiao Bing Liu, Yong Zhong Zeng
Simulation on balde duct vortex in a Francis turbine runner based on S-A model
Yongzhong Zeng1,a and Xiaobing Liu1,b
1School of Energy and Environment, Xihua University, Chengdu, 610039, China
azyzzyzhome@163.com, bliuxb @mail.xhu.edu.cn
Keywords: Spalart-Allmaras model, blade duct vortex, low specific speed, turbine
Abstract.
Introduction With the rapid development of computational fluid dynamics (CFD), the using of turbulence theory to calculate the flow field in the turbine runner has become a powerful tool for the hydraulic design and performance analysis of the runner, and the calculation results have been approved by[1,2] .
Numerical Simulation of Vortex Flow in Draft Tube of Turbine 3.1 Geometric model and grid A Francis turbine with long and short blades and with the model of HLA542-LJ-130 was used for the calculation.
[2] YUAN Shouqi, HE Youshi, YUAN Jianping, et al., PIV measurements and numerical simulations of flow in centrifugal pump impellers with splitting vanes, Chinese Journal of Mechanical Engineering, 42(5) (2006), pp.60-63
Bui, A parallel finite-volume algorithm for large-eddy simulation of turbulent flows, Computer & Fluids; 2000, 29: 877-915
Introduction With the rapid development of computational fluid dynamics (CFD), the using of turbulence theory to calculate the flow field in the turbine runner has become a powerful tool for the hydraulic design and performance analysis of the runner, and the calculation results have been approved by[1,2] .
Numerical Simulation of Vortex Flow in Draft Tube of Turbine 3.1 Geometric model and grid A Francis turbine with long and short blades and with the model of HLA542-LJ-130 was used for the calculation.
[2] YUAN Shouqi, HE Youshi, YUAN Jianping, et al., PIV measurements and numerical simulations of flow in centrifugal pump impellers with splitting vanes, Chinese Journal of Mechanical Engineering, 42(5) (2006), pp.60-63
Bui, A parallel finite-volume algorithm for large-eddy simulation of turbulent flows, Computer & Fluids; 2000, 29: 877-915
Online since: November 2014
Authors: Xiang Gou, Zi Fang Wang, Jian Li Liu, Lian Sheng Liu, Ye Bin Yin, Jin Xiang Wu, En Yu Wang
Ghodsipour and Sadrameli [11] made an analysis of a rotary air preheater for the flue gas heat recovery and good agreement has been obtained between the simulation results and experimental data.
In this simulation work, mixture multiphase flow model is applied to solve the flow process inside the heater, the continuity equation for the mixture is ∂(rm)∂t+∇×(rmvm)=0
CFD software is applied to simulate the heating process of the air by flue gas in this work.
Simulation results.
Deng, Numerical simulation research on mixing process of steam and crude oil, Energy Education Science and Technology Part A: Energy Science and Research. 32 (2014) 3125-3134.
In this simulation work, mixture multiphase flow model is applied to solve the flow process inside the heater, the continuity equation for the mixture is ∂(rm)∂t+∇×(rmvm)=0
CFD software is applied to simulate the heating process of the air by flue gas in this work.
Simulation results.
Deng, Numerical simulation research on mixing process of steam and crude oil, Energy Education Science and Technology Part A: Energy Science and Research. 32 (2014) 3125-3134.
Online since: August 2011
Authors: Shu De Ji, Bo Gao, Wei Pei, Wen Wang, Hui Zhang
With the platform, the vehicle, system and parts can be designed, the intensity analysis, CFD simulation, control simulation and kinematics simulation can be carried out and the manufacture planning, material processing, process engineering and machine routing can be also made.
The digital simulation is classified as fast simulation for designers and multi-disciplinary coupled simulation for professionals.
The simulation refers to intensity analysis, motion simulation, fluid simulation, control simulation and etc.
The fast simulation mainly applies to the design of key parts.
In addition, they may carry out intensity analysis and all kinds of simulation.
The digital simulation is classified as fast simulation for designers and multi-disciplinary coupled simulation for professionals.
The simulation refers to intensity analysis, motion simulation, fluid simulation, control simulation and etc.
The fast simulation mainly applies to the design of key parts.
In addition, they may carry out intensity analysis and all kinds of simulation.
Online since: November 2012
Authors: Arman Safdari, E.P. Kermani, C.S. Nor Azwadi
Simulation of mixed convection around a square by using LBM
A.
Chatterjee and Amiroudine [8] carried out simulation of mixed convection from tandem square obstacles to flow in order to explore the effect of buoyancy and Prandtl number on flow properties and heat transfer in various conditions as: 1≤Re≤30, 0.7≤ Pr ≤100 and 0≤Ri≤1.
The inherent advantages of lattice Boltzmann method such as simple calculation procedures, suitable for parallel computation, so on, create a great interest in researchers to accept LBM as alternative method to conventional CFD methods.
Nor Azwadi, "Cubic-Interpolated-Pseudo-Particle lattice Boltzmann method for simulation of natural convection heat transfer in an enclosure with different aspect ratios, “Computer and Automation Engineering, vol.5,268-273 (2010).
Chatterjee and Amiroudine [8] carried out simulation of mixed convection from tandem square obstacles to flow in order to explore the effect of buoyancy and Prandtl number on flow properties and heat transfer in various conditions as: 1≤Re≤30, 0.7≤ Pr ≤100 and 0≤Ri≤1.
The inherent advantages of lattice Boltzmann method such as simple calculation procedures, suitable for parallel computation, so on, create a great interest in researchers to accept LBM as alternative method to conventional CFD methods.
Nor Azwadi, "Cubic-Interpolated-Pseudo-Particle lattice Boltzmann method for simulation of natural convection heat transfer in an enclosure with different aspect ratios, “Computer and Automation Engineering, vol.5,268-273 (2010).