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Online since: March 2014
Authors: Tae Il Seo, Youn Seung Jeong, Yong Wook Shin
To evaluate the proposed method, experimental work with existing was conducted and good agreement between simulation and experimental results.
To evaluate the proposed method, experimental work with existing was conducted and good agreement between simulation and experimental results.
(a) Simulated spray velocity (b) Spray half angle captured by camera Fig. 6 Simulation and experimental results (d = 0.35mm, l = 0.26mm) Table 4.
To evaluate the proposed method, experimental work with existing was conducted and good agreement between simulation and experimental results.
[4] Yonggui Xu, Mingyan Liu, Can Tang, Three-dimensional CFD–VOF–DPM simulations of effects of low-holdup particles on single-nozzle bubbling behavior in gas–liquid–solid systems, Chemical Engineering Journal. 222 (2013) 292-306
To evaluate the proposed method, experimental work with existing was conducted and good agreement between simulation and experimental results.
(a) Simulated spray velocity (b) Spray half angle captured by camera Fig. 6 Simulation and experimental results (d = 0.35mm, l = 0.26mm) Table 4.
To evaluate the proposed method, experimental work with existing was conducted and good agreement between simulation and experimental results.
[4] Yonggui Xu, Mingyan Liu, Can Tang, Three-dimensional CFD–VOF–DPM simulations of effects of low-holdup particles on single-nozzle bubbling behavior in gas–liquid–solid systems, Chemical Engineering Journal. 222 (2013) 292-306
Online since: August 2013
Authors: Lin Bu, Dexter Velez Sorono, Ser Choong Chong, Tai Chong Chai, Xiao Wu Zhang, Siow Ling Ho
In this work, wafer level simulations were performed to investigate the impact of die shift while board level simulations were carried out to study the fatigue life of the package during thermal cycling.
The wafer level simulations are based on a molded 12 inch reconfigured wafer.
Through simulations, this study aims to provide guidelines to facilitate the manufacturing process and to increase the reliability of the package.
Finite element models (FEM) were employed for mechanical effects while a combination of mold flow simulation using computation fluid dynamics (CFD) and FEM was used to calculate the die shift attributed by mold flow.
It is found that with careful consideration of all the mechanisms, the results from simulation match well with the experimental observations (Figure 2).
The wafer level simulations are based on a molded 12 inch reconfigured wafer.
Through simulations, this study aims to provide guidelines to facilitate the manufacturing process and to increase the reliability of the package.
Finite element models (FEM) were employed for mechanical effects while a combination of mold flow simulation using computation fluid dynamics (CFD) and FEM was used to calculate the die shift attributed by mold flow.
It is found that with careful consideration of all the mechanisms, the results from simulation match well with the experimental observations (Figure 2).
Online since: October 2010
Authors: Qi Kun Wang
COMPARISON ON PERFORMANCE
CFD Model and Numerical Approach
In this paper, the aerodynamic performance is numerically investigated for the different types of
twisted blades.
All the simulations are implemented by commercially available CFD software Numeca.
In order to improve the simulation precision, the grids are densified with the dimensionless y+ to 2 near the walls and in some domains with complex flow structure.
All the simulations are implemented by commercially available CFD software Numeca.
In order to improve the simulation precision, the grids are densified with the dimensionless y+ to 2 near the walls and in some domains with complex flow structure.
Online since: July 2015
Authors: Stefan Scharf, Rüdiger Baehr
On the basis of different FEM and CFD calculations regarding temperature field analysis, strength prognosis and fatigue strength an assessment and an evaluation of the achievable performance potential is given.
To realize an economical viable production of all derived variants, firstly, the necessary core and mold geometries were designed, optimized by simulation and finally produced.
Figure 7: Generated hybrid demonstrators in the different material combinations [3] Benefits and achievable potentials Based on the knowledge gained from the material-technical preliminary inquiries of the connection behaviour of the considered material combinations in close co-operation with the partner in research, IAV GmbH Chemnitz, both FEM and CFD-based calculations were carried out to estimate and to evaluate the performance potential of the derived cylinder head variants following the MULAY-Head Concept.
To realize an economical viable production of all derived variants, firstly, the necessary core and mold geometries were designed, optimized by simulation and finally produced.
Figure 7: Generated hybrid demonstrators in the different material combinations [3] Benefits and achievable potentials Based on the knowledge gained from the material-technical preliminary inquiries of the connection behaviour of the considered material combinations in close co-operation with the partner in research, IAV GmbH Chemnitz, both FEM and CFD-based calculations were carried out to estimate and to evaluate the performance potential of the derived cylinder head variants following the MULAY-Head Concept.
Online since: February 2014
Authors: Yang Xie, Cang Su Xu
Numerical Study on Internal Nozzle Flow Characteristic of Injector under Hot Fuel Conditions
Yang Xie a, Cangsu Xu b
Institute of Power-driven Machinery and Vehicle Engineering, Zhejiang University, Hangzhou 310027, China
axieyang_auto@163.com, bxcs0929@163.com(corresponding author)
Keywords: Temperature; Cavitation; Internal nozzle flow; Numerical simulation; Diesel
Abstract.
The current paper presents simulation of internal nozzle flow characteristic under the condition of different temperatures and pressures on the basis of a two-dimensional model with the help of CFD method.
Numerical simulation Fuel.
Simulations were set at atmospheric pressure (nominally 0.1MPa).
The current paper presents simulation of internal nozzle flow characteristic under the condition of different temperatures and pressures on the basis of a two-dimensional model with the help of CFD method.
Numerical simulation Fuel.
Simulations were set at atmospheric pressure (nominally 0.1MPa).
Online since: March 2014
Authors: Hai Bo Xie, Jian Bin Liu
This paper reports the simulation and experimental results of a type of widely used load control valve.
The simulation results and the experiment data agree well and both results show a good performance of the valve.
According to the governing Eq. 1 ~ Eq. 9, the simulation model of the load control valve is developed in the modeling environment software package AMESim® (Advanced Modeling Environment for performing Simulations of engineering systems).
The simulation results of the displacement of the pilot spool and main spool are illustrated in Fig. 8.
The simulation results and experiment data agree well which allows further study on the valve by simulation.
The simulation results and the experiment data agree well and both results show a good performance of the valve.
According to the governing Eq. 1 ~ Eq. 9, the simulation model of the load control valve is developed in the modeling environment software package AMESim® (Advanced Modeling Environment for performing Simulations of engineering systems).
The simulation results of the displacement of the pilot spool and main spool are illustrated in Fig. 8.
The simulation results and experiment data agree well which allows further study on the valve by simulation.
Online since: October 2011
Authors: Ahmad Bedram, Ali Moosavi
For simulation the problem, a VOF method used and for verifying the accuracy of the simulation the results compared with two analytical researches and a good agreement was found.
The fluids considered in the simulations are water with viscosity and density and oil with viscosity and density.
Tan, "Theory and numerical simulation of droplet dynamics in complex flows-a review," Lab Chip, 4:25, 2004
Urbant, "Numerical simulations of drops in microchannels," M.Sc. thesis, Technion, 2006
Haynes, "On the CFD modeling of Taylor flow in microchannels," Chemical Engineering Science, 64, 2941-2950, 2009
The fluids considered in the simulations are water with viscosity and density and oil with viscosity and density.
Tan, "Theory and numerical simulation of droplet dynamics in complex flows-a review," Lab Chip, 4:25, 2004
Urbant, "Numerical simulations of drops in microchannels," M.Sc. thesis, Technion, 2006
Haynes, "On the CFD modeling of Taylor flow in microchannels," Chemical Engineering Science, 64, 2941-2950, 2009
Online since: February 2014
Authors: Ning Xia Yin, Zhao Ping Xu, Si Qin Chang, Ji Ming Lin
This article investigates the effect of piston motion on combustion of four-stroke CNG FPE using a multidimensional simulation model.
A detailed expansion process model of free piston engine is derived and extensive simulation results were presented.
The simulations were performed with varied piston motion in the expansion process.
Fig.2 shows the computational mesh used in the simulations.
Simulation cases were setup for comparison the free piston motion velocity.
A detailed expansion process model of free piston engine is derived and extensive simulation results were presented.
The simulations were performed with varied piston motion in the expansion process.
Fig.2 shows the computational mesh used in the simulations.
Simulation cases were setup for comparison the free piston motion velocity.
Online since: January 2015
Authors: Yan Ming Song, Yang Yang
The different simulation models are established to calculate the performances of the MTUR.
During first simulation, the translating speed of the ribbon was 27 m/s, and the MTUR rotating velocity was 1475 rpm.
The air pressure force Fp is calculated by CFD (computer fluid dynamic) method with the ribbon length is 690 mm and air gap is 1mm, as shown in Fig. 5.
Magnetic flux density of the second take up step Simulation of the Second Take-up Step.
The second take-up simulation is to analyze the MAF whether enough to overcome the centrifugal force Fc.
During first simulation, the translating speed of the ribbon was 27 m/s, and the MTUR rotating velocity was 1475 rpm.
The air pressure force Fp is calculated by CFD (computer fluid dynamic) method with the ribbon length is 690 mm and air gap is 1mm, as shown in Fig. 5.
Magnetic flux density of the second take up step Simulation of the Second Take-up Step.
The second take-up simulation is to analyze the MAF whether enough to overcome the centrifugal force Fc.
Online since: January 2012
Authors: Peng Wu, Wei Li, Jia Wu
Wu)*
Keywords: Oscillatory Flow Reactor, Conic Ring Baffles, Temperature Field, 3-Dimensional Simulation.
The temperature field of conic baffled OFR was obtained by using the commercial CFD package CFX11.0.
Results and discussion Two groups of oscillatory Reynolds numbers are selected among a large number of simulation results which cover a range of Reo from 400 to 7000 with Reo=0 to illustrate the heat transfer mechanism in OFR.
The temperature field of conic baffled OFR was obtained by using the commercial CFD package CFX11.0.
Results and discussion Two groups of oscillatory Reynolds numbers are selected among a large number of simulation results which cover a range of Reo from 400 to 7000 with Reo=0 to illustrate the heat transfer mechanism in OFR.