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Online since: April 2010
Authors: Jean Michel Hugo, Emmanuel Brun, Frédéric Topin, Jérôme Vicente
We solve Navier-Stokes equations in the fluid phase and energy
equation in both solid and fluid phases using a commercial CFD software: StarCCM4+ by CDAdapco.
Table 2 presents inertial and viscous parameters calculated from present simulation along with available literature data obtained for similar foam.
However, this local simulation gives us a fair insight of thermal performance for heat exchanger unit design.
Conclusion and Perspectives We predict important parameters relative to foam use in heat exchangers using simulation at pore scale on real topology.
Vicente, et al.: Thermal conductivity of metallic foam: simulation on real x-ray tomographied porous medium and photothermal experiments (in 13TH International Heat Transfer Conference. 2006.
Table 2 presents inertial and viscous parameters calculated from present simulation along with available literature data obtained for similar foam.
However, this local simulation gives us a fair insight of thermal performance for heat exchanger unit design.
Conclusion and Perspectives We predict important parameters relative to foam use in heat exchangers using simulation at pore scale on real topology.
Vicente, et al.: Thermal conductivity of metallic foam: simulation on real x-ray tomographied porous medium and photothermal experiments (in 13TH International Heat Transfer Conference. 2006.
Online since: September 2024
Authors: Olena Nadon, Oleksandr Chernenko, Viktoriya Pasternak, Artem Ruban
The simulation results provided important information about the properties and interaction of non-isometric components under different conditions.
The results of the computer simulation are shown below in Figure 5.
In parallel with the computer simulation, a number of important processes were observed.
Seyyedbagheri, CFD modeling of black powder particles deposition in 3D 90-degree bend of natural gas pipelines, Journal of Natural Gas Science and Engineering 78 (2020) 1-20
Wang, Phase-field model simulations of alloy directional solidificationand seaweed-like microstructure evolution based on adaptive finite element method.
The results of the computer simulation are shown below in Figure 5.
In parallel with the computer simulation, a number of important processes were observed.
Seyyedbagheri, CFD modeling of black powder particles deposition in 3D 90-degree bend of natural gas pipelines, Journal of Natural Gas Science and Engineering 78 (2020) 1-20
Wang, Phase-field model simulations of alloy directional solidificationand seaweed-like microstructure evolution based on adaptive finite element method.
Online since: September 2013
Authors: Gang Xue, Liang He, Bai Ping Xu, Hui Wen Yu, Xiao Long Wang
The corresponding numerical simulation and the experimental investigation are carried out to characterize the mixing performance.
At first, the numerical simulation of the embedded planetary screw extruder is carried out using CFD technology, and then the chaotic mixing effect of the flow field is characterized by the use of flow particle tracking technique.
The numerical simulation of three-dimensional isothermal flow was carried out, the velocity field and pressure field were obtained under the different boundary conditions [7, 8].
LDPE is used for simulation material, its model parameters is respectively: η0=26470Pa·s, λ=2.15s, n=0.38[9].
When the center screw rotated at 60rpm and the pressure gradient was kept as 10MPa, the simulation results of both cases are shown in Fig.4.
At first, the numerical simulation of the embedded planetary screw extruder is carried out using CFD technology, and then the chaotic mixing effect of the flow field is characterized by the use of flow particle tracking technique.
The numerical simulation of three-dimensional isothermal flow was carried out, the velocity field and pressure field were obtained under the different boundary conditions [7, 8].
LDPE is used for simulation material, its model parameters is respectively: η0=26470Pa·s, λ=2.15s, n=0.38[9].
When the center screw rotated at 60rpm and the pressure gradient was kept as 10MPa, the simulation results of both cases are shown in Fig.4.
Online since: June 2008
Authors: J.F. Li, Suo Long Zhang
In order to make up the shortage of the study on air-hole
distributing mode of equidistant air-holes with unequal diameter on the air-cushion belt conveyor, an
instance of the air-cushion flow field was numerically simulated based on the CFD software ,Fluent
software.
The models used for simulation are divided into 12 groups.
Simulation result analysis.
The simulation results are different from the real air-cushion on air-cushion belt conveyor.
All these factors would influence the consistency between the simulation results and the fact.
The models used for simulation are divided into 12 groups.
Simulation result analysis.
The simulation results are different from the real air-cushion on air-cushion belt conveyor.
All these factors would influence the consistency between the simulation results and the fact.
Online since: May 2018
Authors: Ani Hairani, Adam Pamudji Rahardjo, Djoko Legono
FLUENT simulation result gave good agreement with Darcy-Weisbach formula.
The experiment conducted by Legono, et al. was slightly greater than the simulation results.
FLUENT simulation result gave good agreement with Darcy-Weisbach formula.
Flow simulation in this study was carried out by assuming a steady flow.
[9] Fluent Inc, Fluent Theory Guide, CFD Software Package Fluent Ver. 6.3, Fluent Inc, Lebanon, 2005
The experiment conducted by Legono, et al. was slightly greater than the simulation results.
FLUENT simulation result gave good agreement with Darcy-Weisbach formula.
Flow simulation in this study was carried out by assuming a steady flow.
[9] Fluent Inc, Fluent Theory Guide, CFD Software Package Fluent Ver. 6.3, Fluent Inc, Lebanon, 2005
Online since: October 2011
Authors: Qian Wang, Jian Feng Pan, Zhi Xia He, Jun Jie Chen
Numerical simulation on catalytic combustion of hydrogen inside micro tube
Junjie Chena, Qian Wang, Zhixia He and Jianfeng Pan
School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
ajjiechen@sina.com
Keywords: catalytic combustion; micro-tube; wall material; combustion characteristics; micro-scale
Abstract.
Numerical models and simulation approach Model geometry and mesh.
For the all scenarios analyzed in this study, the same grid size of 5μm is used to mesh the models for the CFD simulations.
The simulations show that the gas phase reaction can not be ignored inside a micro-catalyst reactor for most conditions.
Numerical models and simulation approach Model geometry and mesh.
For the all scenarios analyzed in this study, the same grid size of 5μm is used to mesh the models for the CFD simulations.
The simulations show that the gas phase reaction can not be ignored inside a micro-catalyst reactor for most conditions.
Online since: April 2022
Authors: Mufutau Akindoye Waheed, Olalekan Olaoluwa Olamide, Olusegun Balogun, Lateef Olaitan, Sidikat Kuye
Rao et al. [16] performed numerical simulations involving a circumferential finned tube heat exchanger.
Using experimental and numerical simulations, it was discovered that the staggering arrangements and splitter plate led to an increase in the Nusselt number and a corresponding decrease in the pressure.
The simulations results for different mesh refinements are shown in Fig. 3.
The CFD results were compared with the numerical data and literature correlations.
Wankhede, Experimental and CFD prediction of heat transfer and friction factor characteristics in cross flow tube bank with integral splitter plate, Int.
Using experimental and numerical simulations, it was discovered that the staggering arrangements and splitter plate led to an increase in the Nusselt number and a corresponding decrease in the pressure.
The simulations results for different mesh refinements are shown in Fig. 3.
The CFD results were compared with the numerical data and literature correlations.
Wankhede, Experimental and CFD prediction of heat transfer and friction factor characteristics in cross flow tube bank with integral splitter plate, Int.
Online since: February 2012
Authors: Jing Feng Huang
It is a promising technology which integrates the CAD, CAE and virtual simulation technology.
Years before, due to the inefficiency in converting the data and integrating the information between the ship designing CAD system and the simulation analysis CAE software, it was unable to establish the connected relationship between the geometrical models and simulation analytical models so that the models could not be directly applied in the engineering analysis and calculation, this is called Information Island.
Through the converting and processing of the geometrical model (including the conversion of the model data format, the simplification of the model, the meshing, the process of the model boundary and so on), it is effective to generate the ship product simulation analytical model, perform analysis and calculation in the simulation analytical software and analyze or evaluate the design result, found in the literature [1].So, the 3D design model is set as the main model while the simulation analytical models of other disciplines which are derived from the main model are set as the connected models.
These pack the fundamental task elements that are from the work of product design, modeling, analysis and simulation.
With one example ship designed on the platform, we conducted the preliminary analysis of general performance, realized the integration of tools such as CATIA, FLUENT, NASTRAN etc., built parametric hull form surface and ship structural model, set the data connections among CAD, CAE and CFD and formed the template database of the fixation and accumulation of the knowledge and experience.
Years before, due to the inefficiency in converting the data and integrating the information between the ship designing CAD system and the simulation analysis CAE software, it was unable to establish the connected relationship between the geometrical models and simulation analytical models so that the models could not be directly applied in the engineering analysis and calculation, this is called Information Island.
Through the converting and processing of the geometrical model (including the conversion of the model data format, the simplification of the model, the meshing, the process of the model boundary and so on), it is effective to generate the ship product simulation analytical model, perform analysis and calculation in the simulation analytical software and analyze or evaluate the design result, found in the literature [1].So, the 3D design model is set as the main model while the simulation analytical models of other disciplines which are derived from the main model are set as the connected models.
These pack the fundamental task elements that are from the work of product design, modeling, analysis and simulation.
With one example ship designed on the platform, we conducted the preliminary analysis of general performance, realized the integration of tools such as CATIA, FLUENT, NASTRAN etc., built parametric hull form surface and ship structural model, set the data connections among CAD, CAE and CFD and formed the template database of the fixation and accumulation of the knowledge and experience.
Online since: April 2017
Authors: Qun Zheng, Salman Abdu, Gambo Kofar Bai Dayyabu, Hai Zhang
Li, "Wet Compression System Stability Analysis: Part II—Simulations and Bifurcation Analysis," in ASME Turbo Expo 2004: Power for Land, Sea, and Air, 2004, pp. 713-721
Bhargava, "Understanding effects of wet compression on separated flow behavior in an axial compressor stage using CFD analysis," Journal of Turbomachinery, vol. 133, p. 031026, 2011
Bhargava, "Numerical Simulation of a Complete Gas Turbine Engine With Wet Compression," Journal of Engineering for Gas Turbines and Power, vol. 135, p. 012002, 2013
Ahmad, "CFD aerodynamic investigation of air-water trajectories on rotor-stator blade of an axial compressor for online washing," in ASME Turbo Expo 2006: Power for Land, Sea, and Air, 2006, pp. 1385-1394
Gosman, "Development of methodology for spray impingement simulation," SAE Technical Paper 0148-7191, 1995
Bhargava, "Understanding effects of wet compression on separated flow behavior in an axial compressor stage using CFD analysis," Journal of Turbomachinery, vol. 133, p. 031026, 2011
Bhargava, "Numerical Simulation of a Complete Gas Turbine Engine With Wet Compression," Journal of Engineering for Gas Turbines and Power, vol. 135, p. 012002, 2013
Ahmad, "CFD aerodynamic investigation of air-water trajectories on rotor-stator blade of an axial compressor for online washing," in ASME Turbo Expo 2006: Power for Land, Sea, and Air, 2006, pp. 1385-1394
Gosman, "Development of methodology for spray impingement simulation," SAE Technical Paper 0148-7191, 1995
Online since: March 2019
Authors: Jerzy Gawad, Ilaria Iaconeta, Sai Pavan Bhogireddy, Philippe Hernaut, Aleksandr Lebedev, Gijsbert Wierink, Bruno Charles de Cooman
A Numerical Model for the Prediction of Microstructure Distribution Across the Thickness of Quenched Steel Plates
GAWAD Jerzy1,a*, IACONETA Ilaria1,b, BHOGIREDDY Sai Pavan1,c, HERNAUT Philippe2,d*, LEBEDEV Aleksandr3,e, WIERINK Gijsbert1,f
and DE COOMAN Bruno Charles3,f
1NLMK Group R&D&I, Rue Des Riveaux 2, 7100 La Louvière, Belgium
2NLMK Clabecq SA, Rue de Clabecq 101, 1460, Ittre, Belgium
3NLMK Group R&D, Moscow, Russia
aj.gawad@eu.nlmk.com, bi.iaconeta@eu.nlmk.com, csp.bhogireddy@eu.nlmk.com, dp.hernaut@eu.nlmk.com, elebedev_am@nlmk.com, fg.wierink@eu.nlmk.com
Keywords: plate quenching; material property optimization; inverse analysis; numerical simulation;
Abstract.
In the analyses of the transient simulations, performed by using the commercial software Ansys Mechanical [10], non-linear thermal properties (ρ, cp, K) and moving boundary conditions are considered.
Simulation of Q&T steels, Purdue University, 2001 [3] Xiaohu Deng, Dongying Ju, Modeling and Simulation of Quenching and Tempering Process in steels, Physics Procedia, pp 368-374 (2013) [4] EN10025-6 Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition
Aronov, CFD and FEA Used to Improve the Quenching Process, Heat Treating Progress, 2008, pp. 50–56
In the analyses of the transient simulations, performed by using the commercial software Ansys Mechanical [10], non-linear thermal properties (ρ, cp, K) and moving boundary conditions are considered.
Simulation of Q&T steels, Purdue University, 2001 [3] Xiaohu Deng, Dongying Ju, Modeling and Simulation of Quenching and Tempering Process in steels, Physics Procedia, pp 368-374 (2013) [4] EN10025-6 Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition
Aronov, CFD and FEA Used to Improve the Quenching Process, Heat Treating Progress, 2008, pp. 50–56