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Online since: October 2011
Authors: Hsien Te Lin, Yu Chung Wang
These combined factors surrounding energy consumption is very complex, and must first be rectified through continuous simulation to reach pre-determined energy-saving target.
BEMS is then used to explore actual energy-saving efficiencies in the second stage following building’s completion. 2-1. eQUEST MODEL BUILDING ENERGY CONSUMPTION Standard model building is established as an assessment method by setting similar simulated conditions such as climate, shape of building, operating duration, through eQUEST simulation analysis of energy consumption baseline for the whole year. eQUEST corresponds to constructing energy-saving techniques of the model building and the simulation analysis of energy consumption, benchmarking each of them against such baseline. 2-1-1.
Buoyancy Ventilation Design CFD Simulation, International Conference, Magic School of Green Technology [2] (6).
Differences between eQUEST Simulation Estimate and Actual Energy Consumption January February March April May June eQUEST Simulation Estimate [kWh] 6280 7440 8900 10960 12820 14400 Actual Energy Consumption [kWh] 5099 5745 7322 9318 11241 12181 Differences [%] -18.8% -22.8% -17.7% -15% -12.3% -15.4% 4.
Online since: June 2022
Authors: G. Naga Srinivasulu, Ajaya Bharti, Devendra Prasad, Naveen Kumar, Syed Mohd Azam
Experimental Analysis on Flow Field Pattern of PEM Fuel Cells Devendra Prasad1,a, G Naga Srinivaslu2,b, Ajaya Bharti1,c, Naveen Kumar1,d* and Syed Mohd Azam1,e 1Applied Mechanics Department, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India 2Mechanical Engineering Department, National Institute of Technology Warangal, Warangal, India adevendralalla51091@gmail.com, bgnsnitw@gmail.com, cabharti@mnnit.ac.in, dchaudhary56naveen@gmail.com, emohdazam177@gmail.com *corresponding author Keywords: PEM Fuel Cell, CFD, Nature Inspired Flow Field, Serpentine, Leaf Channel.
Naga, Numerical Simulation and Experimental Comparison of Single, Double and Triple Serpentine Flow Channel Configuration on Performance of a PEM Fuel Cell, Arab.
Dukhan, Metal-Foam Bipolar Plate for PEM Fuel Cells: Simulations and Preliminary Results, Mater.
Online since: January 2013
Authors: Li Jun Guo, Xin Du
The simulation model is based on the solution of the minimum energy problem by the Surface Evolver software.
Zeng et al. provided a CFD solution based on the three-dimensional Navier-Stokes equation [4].
Online since: June 2014
Authors: Zhen Wei Yuan, Dong Shuai Zhu, Jun Zhang
Based on the inspection of the Ainley and Mathieson and the Benner et al. models for profile losses, the two models are compared through numerical simulations.
In order to compare with the ratio of profile loss at any incidence to profile loss at zero incidence YpYpi=0 as stated in Ainley and Mathieson [2], here we introduce an incidence correction factor, named χi, to represent YpYpi=0, which is defined according to its connotation by χi=1+∆YpYpi=0 (5) Comparisons and analyses In order to compare the two models, numerical simulations for the Benner et al. model were performed with MATLAB.
It has been proved in the literature [9, 13] that predictions from the Benner et al. [9] model agreed better with the experimental and CFD results than those from Ainley and Mathieson model, owing to the improvements made by Moustapha et al. [8] and Benner et al. [9] to the off-design correlations for profile loss.
Conclusions and remarks On the basis of inspecting the prediction correlations for profile loss derived by Ainley and Mathieson and Benner et al. [9], we compared the two prediction models through numerical simulations.
Online since: January 2016
Authors: Lukáš Bednář, Martin Miczán, Michal Hoznedl, Ladislav Tajč
The aim of the experiment on the steam version of the control valve is to compare the real result with the prediction of forces applied on the pin and the spindle obtained from experiments [4,5] with a model version of the valve and with designed force from numerical simulation [6, 7, 8].
Based on complementary measurements on the air model and checking numerical simulations it is evident that the second operational variation considered for air model corresponds most closely with the construction design.
Matas: CFD simulace nového typu odlehčeného regulačního ventilu parní turbíny pro vysoké parametry páry, Report NTC at University of West Bohemia in Plzeň, NTL 02-04/08, 2008.
Partial output for The Ministry of Education, Youth and Sports (MEYS, MŠMT in Czech)/ 1M06059 - Advanced Technologies and Systems for Power Engineering (2006-2011, MSM/1M) [7] Matas, R, Bednar L., Tajc L.: Numerical Simulations and Experiments as Modern Tools for Research of Control Valves for Steam Turbines, Experimental Fluid Mechanics, 2010, Liberec, ISBN: 978-80-7372-670-6 [8] Matas R., Straka F., Hoznedl, M.: Numerical Simulation of Flow and Determination of Aerodynamic Forces in the Balanced Control Valve.
Online since: December 2020
Authors: Khadidja Boualem, Abbes Azzi
The enhancement of cooling effectiveness by trenched holes was presented by Baheri Islami et al. [15], in which they performed numerical simulations on seven different film cooling configurations on the leading edge of an airfoil.
The CFD results of Wang et al. [20] showed that the impact of the deflection angle of trench-leading edge is smaller than the impact of fillet radius of trench-trailing corner on film cooling effectiveness.
Hou et al. [21] have used large eddy simulation to examine trenched hole with different compound angles and coolant inflow orientations in improving the film cooling performance.
I., and Severina, V.V., Numerical Simulation of Film Cooling with a Coolant Supplied Through Holes in a Trench, Journal of Engineering Physics and Thermophysics, vol 90, no 3, pp. 637–643, 2017
[21] Hou, R., Wen, F., Wang, S., Luo, Y., Tang, X., Large eddy simulation of the trenched film cooling hole with different compound angles and coolant inflow orientation effects, Applied Thermal Engineering, vol. 163, 2019
Online since: August 2022
Authors: Viktoriya Pasternak, Nataliia Huliieva, Artem Ruban
Also, based on the obtained equation (2), we have created an integrated environment in the form of a computer simulation model.
It should be noted that the computer simulation model is developed on the basis of the C++ programming language, which allows modelling material particles without setting up an expensive experiment, and is also an object-oriented complex through its accuracy classes and data types, which allows obtaining and predicting reliable particle modelling information.
In Figure 3 shows an example of visualization of the software for modelling the backfill of material particles according to the developed computer simulation model.
Padding, Multiscale modelling of wall-to-bed heat transfer in fixed beds with non-spherical pellets: from particle-resolved CFD to pseudo-homogenous models, Chemical Engineering Science, 236 (2021) 1-15
Svirzhevskyi, Numerical simulation of the microstructure of structural-inhomogeneous materials, Lecture Notes in Mechanical Engineering (2020) 562-571
Online since: October 2016
Authors: Gianluca Buffa, Livan Fratini, Dario Baffari
Although FSE can be considered extremely competitive even with respect to the direct method, as near-zero emissions of carbon dioxide and no emissions of metal oxide particulates are produced, the real potential of the process has not been still highlighted due to the significant knowledge gap present in literature especially regarding flux analysis and defect prediction via complete 3D FEM simulation.
Zhang et al. [18] recently proposed a CFD numerical model able to provide initial insights on the material flow occurring in FSEW of AA6061 aluminum alloys.
The results of these preliminary simulations showed that the relative density of the chips billet rapidly increased to 1 before the extrusion process took place.
This assumption linearizes the thermal problem speeding up the simulation.
The numerical simulation fully highlights the material movement in the chip chamber and extrusion channel (Fig. 8c).
Online since: April 2015
Authors: Jian Jun Jiang, Huan Xia, Li Zhang, Chen Qiu, Shao Wei Bie
Recently, some groups have used different accurate analysis software (such as COMSOL [13], ANSYS [14] and computational fluid dynamics (CFD [15,16]) software) for simulating the ZnO nanowire growth process, which could determine and predict the experiment results [13,14].
The CVD process is a complex multiphysics in horizontaltube reactor, involving simulation heat, mass transfer, gas flow and chemical reaction.
In this work, a simple simulation was tailored to qualitatively reveal the flow characteristics as a function of carrier gas flow rate and time.
According to our simulation results, the In species concentration increases with the growth time.
Wen, Morphological evolution of ZnO nanostructures: experimental and preliminary simulation studies, CrystEngComm. 14 (2012) 5539-5543
Online since: May 2014
Authors: Matteo Strano, Bianca Maria Colosimo, Luca Pagani
Another example can be found in the field of CFD (Computational Fluid Dynamics), where a multistage metamodeling technique that links data coming from two different numerical sources (finite volumes and finite differences calculations) has been implemented [9].
Predictions obtained via equation (6) are based on the Lo-Fi simulations only.
Needless to say, the FEM simulation process is deterministic.
(a) Non calibrated simulations (b) Calibrated simulations Fig. 5: Confidence interval of the prediction error of the fusion models Conclusion In this paper we have shown that, in a specific test case, a hierarchical fusion model based on calibrated simulations yields the same prediction ability of a given response variable of a fusion metamodel built on non-calibrated simulations.
"The Metamodel in Simulation Analysis: Can It Be Trusted ?"
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