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Online since: May 2011
Authors: Hang Guo, Chong Fang Ma, Yue Ping Chen, Fang Ye
Valeri et al. developed a three-dimensional computational fluid dynamics (CFD) model to simulate gas evolution and current distribution in a DMFC [6].
Grid Independency Test Right mesh selection is an important task in simulation study.
The simulation results display non-uniform distribution of methanol at the different cross sections.
Fig. 7 presents simulation outcomes with a comparison of the averaged liquid z-direction velocities on above-mentioned three surfaces along the surface plane negative y-direction with time.
Grid Independency Test Right mesh selection is an important task in simulation study.
The simulation results display non-uniform distribution of methanol at the different cross sections.
Fig. 7 presents simulation outcomes with a comparison of the averaged liquid z-direction velocities on above-mentioned three surfaces along the surface plane negative y-direction with time.
Online since: September 2016
Authors: H.V. Atkinson, Qiang Zhu, Xiao Gang Hu, Wen Ying Qu, Fan Zhang, Min Luo
It is therefore significant to visualize the filling process by using a simulation approach.
Experimental Study and Numerical Simulation on the Blistering Defect during Thixocasting.
Fig. 1 Schematic drawing of the computational part and corresponding monitored locations during simulation. 2.2 Numerical procedure In the present work, commercial CFD software FLUENT (version 16.2) has been used to develop a three-dimensional isothermal numerical model of semi-solid die filling process using Eulerian multiphase flow approach.
Fig. 3 shows the quantitative solid fraction along line (A-B) and simulation results for comparison.
Comparing with one-phase simulation, it is reasonable to conclude that multiphase simulation of semi-solid die casting has significant advantages in modelling gas entrapment.
Experimental Study and Numerical Simulation on the Blistering Defect during Thixocasting.
Fig. 1 Schematic drawing of the computational part and corresponding monitored locations during simulation. 2.2 Numerical procedure In the present work, commercial CFD software FLUENT (version 16.2) has been used to develop a three-dimensional isothermal numerical model of semi-solid die filling process using Eulerian multiphase flow approach.
Fig. 3 shows the quantitative solid fraction along line (A-B) and simulation results for comparison.
Comparing with one-phase simulation, it is reasonable to conclude that multiphase simulation of semi-solid die casting has significant advantages in modelling gas entrapment.
Online since: January 2012
Authors: Hyung Jun Kim, Heung Youl Kim, Yong Ho You, Chan Sol Ahn
For computational analysis, the Fire Dynamics Simulator was used with Large Eddy Simulation model for turbulence.
In Figure 4, the results from the fire test in the real house and simulation has been shown by comparing with picture.
In case of the initial stage of fire, fire development in the fire test and the simulation has a similar pattern until opening the fire door.
The occurrence time of flash-over for each room in the fire test and simulation has been summarized in Table 3.
Mawhinney, "CFD Investigation of Large Scale Pallet Stack Fire in tunnels Protected by Water Mist Systems", Journal of Fire Protection Engineering, Vol.20, pp.149-198(2010)
In Figure 4, the results from the fire test in the real house and simulation has been shown by comparing with picture.
In case of the initial stage of fire, fire development in the fire test and the simulation has a similar pattern until opening the fire door.
The occurrence time of flash-over for each room in the fire test and simulation has been summarized in Table 3.
Mawhinney, "CFD Investigation of Large Scale Pallet Stack Fire in tunnels Protected by Water Mist Systems", Journal of Fire Protection Engineering, Vol.20, pp.149-198(2010)
Online since: June 2020
Authors: Krit Somnuk, Kritsakon Pongraktham
A number of researchers have studied the various types of SMs (KSM, LSM, SMX, and SMV) have been proposed in the simulation and experiment.
Fourcade, et al (2001) simulated the rate of striation thinning value from a laminar flow field of KSM and SMX types using computational fluid dynamics (CFD) method.
Iedema, CFD calculation of laminar striation thinning in static mixer reactors, Chemical Engineering Science. 56 (2001) 6729-6741
Fourcade, et al (2001) simulated the rate of striation thinning value from a laminar flow field of KSM and SMX types using computational fluid dynamics (CFD) method.
Iedema, CFD calculation of laminar striation thinning in static mixer reactors, Chemical Engineering Science. 56 (2001) 6729-6741
Online since: December 2012
Authors: Zheng Xin Yan, Jun Deng, Shi Rong Li
It has revisable source code and is widely used in fire scenario simulation of buildings.
It is directly related with the simulation accuracy and the fire fighting and rescue plan for emergency according to the simulation.
The peak temperature of T7 is higher than that of other points in the simulation with the same parameters.
Compared with the results of simulation without ventilation, the temperature difference between detecting points along tunnel ceiling in simulation of U = ﹣2.7 m/s diminishes obviously.
Model Experimental and CFD Simulation Research on Road Tunnel Fire.
It is directly related with the simulation accuracy and the fire fighting and rescue plan for emergency according to the simulation.
The peak temperature of T7 is higher than that of other points in the simulation with the same parameters.
Compared with the results of simulation without ventilation, the temperature difference between detecting points along tunnel ceiling in simulation of U = ﹣2.7 m/s diminishes obviously.
Model Experimental and CFD Simulation Research on Road Tunnel Fire.
Online since: July 2014
Authors: Jia Feng Wu, Ya Ping Chen, Rui Bing Cao
Mathematical models
Along with the rapid expanding of CFD commercial software, numerical simulation speeds up for more vivid comprehension of the mechanism.
Calculation subprograms of numerical simulations on the density, film thickness, isobaric specific heat capacity and viscosity are conducted.
The simulation results predict that the average concentration of once film-inverse scheme is slightly lower than that of the once mixing uniform scheme.
Numerical Simulation of Characteristics of Falling Film Absorption on Vertical Corrugation Plates for Aqueous Li-Br Solution.
Numerical simulation of heat and mass transfer enhancement in absorption process with double-side film-inversion.
Calculation subprograms of numerical simulations on the density, film thickness, isobaric specific heat capacity and viscosity are conducted.
The simulation results predict that the average concentration of once film-inverse scheme is slightly lower than that of the once mixing uniform scheme.
Numerical Simulation of Characteristics of Falling Film Absorption on Vertical Corrugation Plates for Aqueous Li-Br Solution.
Numerical simulation of heat and mass transfer enhancement in absorption process with double-side film-inversion.
Online since: October 2010
Authors: Kássia Graciele dos Santos, Valéria V. Murata, Marcos A.S. Barrozo, Taisa S. Lira, Marco Gianesella
The kinetic parameters of the pyrolysis process, such as activation energy and pre-exponential factor, were calculated by least squares non-linear method and Scilab are used as the simulation tool.
This work about pyrolysis kinetics is a fundamental study which will be used to our CFD and experimental works about equipments like spouted and fluidized bed [19-21], that will be applied to fast pyrolysis.
Scilab software was used as the simulation tool
This work about pyrolysis kinetics is a fundamental study which will be used to our CFD and experimental works about equipments like spouted and fluidized bed [19-21], that will be applied to fast pyrolysis.
Scilab software was used as the simulation tool
Online since: July 2011
Authors: John A. Taylor, Paul W. Cleary, Mahesh Prakash
High pressure die casting simulation using smoothed particle hydrodynamics.
Comparison of SPH simulations of high pressure die casting with the experiments and VOF simulations of Schmid and Klein.
Simulation of die filling in gravity die casting using SPH and MAGMAsoft, Proc. 2nd Int.
Conf. on CFD in Minerals & Process Industries, Melbourne, Australia, 423–428 [6] P.
Optimisation of ingot casting wheel design using SPH simulations.
Comparison of SPH simulations of high pressure die casting with the experiments and VOF simulations of Schmid and Klein.
Simulation of die filling in gravity die casting using SPH and MAGMAsoft, Proc. 2nd Int.
Conf. on CFD in Minerals & Process Industries, Melbourne, Australia, 423–428 [6] P.
Optimisation of ingot casting wheel design using SPH simulations.
Online since: October 2011
Authors: Jun Feng Peng, Jun Hong, Yan Zhuang
In this model, different shapes of parabola, distances of eccentricity, and depths of interference are considered, and then a series of numerical simulation are carried out.
Finally, according to the results of all the numerical simulations, a comprehensive correlation between the thermal constriction resistance and these parameters is obtained.
Figure 4 Single asperity contact model Numerical Model and Simulation The numerical simulation model is based mainly on the contact model described previously, but with a cylinder of radius b and length L which is six times bigger than b.
The numerical simulations were performed for different values ofβ0, h0 and r0.
A commercial CFD software FLUENT was used to numerically solve the model problems with all the boundaries mentioned previously.
Finally, according to the results of all the numerical simulations, a comprehensive correlation between the thermal constriction resistance and these parameters is obtained.
Figure 4 Single asperity contact model Numerical Model and Simulation The numerical simulation model is based mainly on the contact model described previously, but with a cylinder of radius b and length L which is six times bigger than b.
The numerical simulations were performed for different values ofβ0, h0 and r0.
A commercial CFD software FLUENT was used to numerically solve the model problems with all the boundaries mentioned previously.
Online since: August 2015
Authors: Haziatul Najihah Zana Rahim, Wardiah Dahalan, Atzroulnizam Abu, Muhamad Fadli Ghani, Ismail Zainol, Mohd Zaifulrizal Zainol
The typical values for the component efficiencies that are usually used in the calculation is being listed as below:
· ηt = 0.45 for the turbine efficiency
· ηd = 0.96 for drive – train efficiency
· ηg = 0.95 for generator efficiency
· ηc = 0.98 for the efficiency of the power conditioning component. [9]
Figure 3: Potential power generation (kW) Figure 4: Potential power generation (kW)
at Pulau Langkawi at Pulau Pinang
Figure 5: Potential power generation (kW) at Lumut Figure 6: Potential power generation (kW) at Pelabuhan Klang
Figure 7: Potential power generation (kW) at Tg Keling Figure 8: Potential power generation (kW) at Kukup
Figure 9: Potential power generation (kW) at Johor Bahru
From the simulation result, it shows that the location for the highest potential power generation is at Pelabuhan Klang which is 748.407kW in January with the sweep area of turbine is 1m2.
From the simulation result, it also shows that the lowest potential power generation is at Tanjung Keling with 43.85Kw in February by assuming the sweep area of turbine is 1m2.
Simulation Studies on the Electrical Power Potential Harnessed by Tidal Current Turbines.
Effects of CFD parameter variation on tidal energy resource assessment
From the simulation result, it also shows that the lowest potential power generation is at Tanjung Keling with 43.85Kw in February by assuming the sweep area of turbine is 1m2.
Simulation Studies on the Electrical Power Potential Harnessed by Tidal Current Turbines.
Effects of CFD parameter variation on tidal energy resource assessment