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Online since: July 2012
Authors: Hui Juan Tian, Ya Jun Tian, Hao Wen, Jun Bo Xu
Computational fluid dynamics simulation was performed, which indicates that the morphological evolution of the ZnO structures results from the competition between the axial growth and the radial growth based on different O2 and Zn vapor partial pressure.
Meanwhile, computational fluid dynamics (CFD) simulation was carried to explain the results.
In order to explain the morphological evolution, the simulation was performed using FLUENT 6.3.26 software.
The CFD simulation results indicate the morphological evolution of the ZnO structures are based on the different O2 and Zn partial pressure at different position with the same O2 flow rate.
Meanwhile, computational fluid dynamics (CFD) simulation was carried to explain the results.
In order to explain the morphological evolution, the simulation was performed using FLUENT 6.3.26 software.
The CFD simulation results indicate the morphological evolution of the ZnO structures are based on the different O2 and Zn partial pressure at different position with the same O2 flow rate.
Online since: September 2014
Authors: L.H. Piao, Qi Rui Yang
By using FLUENT-CFD software, through modeling, meshing, solving and other methods, Respectively, the airflow level posture sensor of two-wire structure and three-wire structure are simulated in the sensitive of the velocity field of different tilt angles and different heat source temperatures.
In order to optimize the airflow level posture sensor heat wire structure, this paper use finite element simulation analysis method to calculate the distribution of sensitive components within the structure of the two air velocity varies with temperature, angle changes.
In order to calculate convenience using ANSYS CFD, the sensitive element is simplified as two dimensional structure, thermal resistance wire and heat source are simplified as points.
First, modeling: choosing ANSYS FLOTRAN CFD analysis function, choosing FLUID141 unit.
In order to optimize the airflow level posture sensor heat wire structure, this paper use finite element simulation analysis method to calculate the distribution of sensitive components within the structure of the two air velocity varies with temperature, angle changes.
In order to calculate convenience using ANSYS CFD, the sensitive element is simplified as two dimensional structure, thermal resistance wire and heat source are simplified as points.
First, modeling: choosing ANSYS FLOTRAN CFD analysis function, choosing FLUID141 unit.
Online since: June 2013
Authors: Lin Qiu, Min Yan, Jin Yang, Run Ping Niu
Simulation Research of Angle Action on Fold-type Board in Air-Heating Collector
Lin Qiu1, a, Runping Niu1, b, Min Yan1, c,Jin Yang1, d
1Beijing University of Civil Engineering and Architecture, Beijing, China
aqiulin@bucea.edu.cn, bniurunping@bucea.edu.cn, c yanmin @bucea.edu.cn, dyangjin@bucea.edu.cn
Keywords: numerical simulation, collector; fold-type board, angle
Abstract.
Numerical simulation of the thermal properties of fold-type collector on different angle with Fluent software.
Numeric simulation calculations shown: the fold-type board collector angle action has a greater influence for the thermal properties of collector in air-heating ,the thermal efficiency when is 30°is better than is 45°and is 60°and under this work simulation condition the optimum angle for folded-type panel air collector will be recommend nearby at =30°.
From the simulation results, the different angle plate temperature distribution and velocity distribution of folded-type air collector under the same conditions shown in Fig.3 and Fig.4.
A CFD heat transfer analysis of the transpired solar collector under no-wind conditions.
Numerical simulation of the thermal properties of fold-type collector on different angle with Fluent software.
Numeric simulation calculations shown: the fold-type board collector angle action has a greater influence for the thermal properties of collector in air-heating ,the thermal efficiency when is 30°is better than is 45°and is 60°and under this work simulation condition the optimum angle for folded-type panel air collector will be recommend nearby at =30°.
From the simulation results, the different angle plate temperature distribution and velocity distribution of folded-type air collector under the same conditions shown in Fig.3 and Fig.4.
A CFD heat transfer analysis of the transpired solar collector under no-wind conditions.
Online since: May 2012
Authors: Yi Wen Chen, Qian Liu, Wei Lin, Wen Hao Yang, Jing Zhu, Li Jun Liu, Si Hao Nie, JiuYang Yu
The mechanism of heat transfer enhancement of pulsating flow in a spiral fluted tube was researched by CFD (computational fluid dynamics) software FLUENT.
In the present paper, a number of pulsating flow with different frequencies and amplitudes in a three-dimensional spiral fluted tube were investigated by CFD software FLUENT.
Model and Boundary Conditions Because of the asymmetric structure of spiral fluted tube, in numerical simulation, we use three-dimensional modeling of it.
Results from the numerical simulation indicate that, comparing with the steady flow, the pulsating flow increases the heat transfer efficiency of the spiral fluted tube in laminar flow by 60%.
In the present paper, a number of pulsating flow with different frequencies and amplitudes in a three-dimensional spiral fluted tube were investigated by CFD software FLUENT.
Model and Boundary Conditions Because of the asymmetric structure of spiral fluted tube, in numerical simulation, we use three-dimensional modeling of it.
Results from the numerical simulation indicate that, comparing with the steady flow, the pulsating flow increases the heat transfer efficiency of the spiral fluted tube in laminar flow by 60%.
Online since: February 2014
Authors: Xiang Ming Zheng
Results of simulation and flight test show that our design on aerial robot is effective.
In this paper, we introduce CFD (Computational Fluid Dynamics) method to analyze the aerodynamic performance of the aerial robot.
In the process of simulation, the Gauss normal distribution noise model is used.
Results of Simulation and flight test show that our design on aerial robot is effective.
Tramel2, and Jennie Barber3, Modeling Propeller Flow-Fields Using CFD, Digital Fusion Solutions, Inc., Huntsville, AL 35805, AIAA 2008-402 [6] Greg Welch and Gray Bishop.
In this paper, we introduce CFD (Computational Fluid Dynamics) method to analyze the aerodynamic performance of the aerial robot.
In the process of simulation, the Gauss normal distribution noise model is used.
Results of Simulation and flight test show that our design on aerial robot is effective.
Tramel2, and Jennie Barber3, Modeling Propeller Flow-Fields Using CFD, Digital Fusion Solutions, Inc., Huntsville, AL 35805, AIAA 2008-402 [6] Greg Welch and Gray Bishop.
Online since: January 2016
Authors: Jiří Holman
This work deals with the numerical simulation of unsteady compressible turbulent flow past a circular cylinder.
X-LES model The X-LES X-LES - eXtra-Large Eddy Simulation.
The X-LES model is clearly the most suitable option from presented models for the simulation of unsteady turbulent flows.
Wilcox: Turbulence Modeling for CFD, DCW Industries, Inc.
Wallin: Engineering turbulence modeling for CFD with focus on explicit algebraic Reynoldes stress models, dissertation thesis, Royal Institute of Technology, 2000
X-LES model The X-LES X-LES - eXtra-Large Eddy Simulation.
The X-LES model is clearly the most suitable option from presented models for the simulation of unsteady turbulent flows.
Wilcox: Turbulence Modeling for CFD, DCW Industries, Inc.
Wallin: Engineering turbulence modeling for CFD with focus on explicit algebraic Reynoldes stress models, dissertation thesis, Royal Institute of Technology, 2000
Online since: August 2013
Authors: Da Zheng Wang, Jun Wei Zhou
Simulation of Tidal Stream Turbine Working Near Free Surface
Junwei Zhoua and Dazheng Wang
School of Naval Architecture and Ocean Engineering, Harbin Institute of Technology in Weihai, Weihai 264209, China
azhou_junwei@foxmail.com
Keywords: tidal stream turbine, free surface, immersion depth, wave
Abstract.
Turbine simulation with wave Numerial method.
The CFD method was validated by Myers’s experimental result.
The wave shape was compared with turbines of the same scale, immersion depth, inflow velocity and thrust coefficient, while the water region of the CFD is deeper and wider.
Since the simulation based on a similar geometry, the difference of the two conditions is not caused by parameter of D.
Turbine simulation with wave Numerial method.
The CFD method was validated by Myers’s experimental result.
The wave shape was compared with turbines of the same scale, immersion depth, inflow velocity and thrust coefficient, while the water region of the CFD is deeper and wider.
Since the simulation based on a similar geometry, the difference of the two conditions is not caused by parameter of D.
Online since: May 2014
Authors: Rahman T. Nakkas, Masud Behnia, Babak Fakhim, Ashkan Javadzadegan
Bernad et al [6] has studied the feasibility of using Computational Fluid Dynamics (CFD) to simulate pulsatile blood flow in-vivo in coronary arteries of patients.
However, the main outcome of this study was that it clearly showed that the analysis of transient/pulsatile blood flow using CFD software is indeed feasible in-vivo in realistic coronary artery models, since CFD allows the relevant flow parameters to be characterised with acceptable accuracy.
ANSYS CFX (v14.0, ANSYS-Fluent Inc., Lebanon, NH, USA), a finite volume based software, was coupled to ANSYS Structural (v14.0, ANSYS-Fluent Inc., Lebanon, NH, USA), a finite element based software, for the numerical simulation of the fluid structure interaction (FSI) between the solid (wall) and the fluid (lumen) domains.
Hoffman, Numerical simulations of blood flow in arteries using fluid structure interactions, PhD dissertation, Graduate School of Witchita State University, 2007.
However, the main outcome of this study was that it clearly showed that the analysis of transient/pulsatile blood flow using CFD software is indeed feasible in-vivo in realistic coronary artery models, since CFD allows the relevant flow parameters to be characterised with acceptable accuracy.
ANSYS CFX (v14.0, ANSYS-Fluent Inc., Lebanon, NH, USA), a finite volume based software, was coupled to ANSYS Structural (v14.0, ANSYS-Fluent Inc., Lebanon, NH, USA), a finite element based software, for the numerical simulation of the fluid structure interaction (FSI) between the solid (wall) and the fluid (lumen) domains.
Hoffman, Numerical simulations of blood flow in arteries using fluid structure interactions, PhD dissertation, Graduate School of Witchita State University, 2007.
Online since: October 2013
Authors: Cheng Chu Yue Fu, Li Li Liu, Shu Ren Yang
Numerical simulation of multi-cup isoflux gas anchor
Physical model creating.
The purpose is to mesh to accurate simulation.
Outputs of numerical simulation Extract useful data for thesis.
[3] P.chow,M.Cross,K.Pericleous.A natural extension of the conventional finite volume method into polygonal unstructured meshes for CFD application[J].App Math Modelling.1996 (20):170-183
[4] L.Suarez,F.Kenyery,M.Asuaje.3D CFD Simulation of Rotary Gas-Separator Performance Under Two-Phase-Flow Condition[C].SPE 94959,2005.
The purpose is to mesh to accurate simulation.
Outputs of numerical simulation Extract useful data for thesis.
[3] P.chow,M.Cross,K.Pericleous.A natural extension of the conventional finite volume method into polygonal unstructured meshes for CFD application[J].App Math Modelling.1996 (20):170-183
[4] L.Suarez,F.Kenyery,M.Asuaje.3D CFD Simulation of Rotary Gas-Separator Performance Under Two-Phase-Flow Condition[C].SPE 94959,2005.
Online since: September 2013
Authors: Xiao Ping Ma, Yu Li Zhang
The plume model used in this paper was simulated using a computation fluid dynamic (CFD) software package, FLUENT (Fluent, Inc.).
CFD is used to generate the flow.
Compared with the static plume model, the simulated plume in CFD is more precise because the airflow velocity and odor concentrations are estimated throughout the space of interest [7].
Simulation experiments are carried out, and the comparative result is illustrated.
Lu, “A simulation framework for plume-tracing research,” Proceedings of ACRA.
CFD is used to generate the flow.
Compared with the static plume model, the simulated plume in CFD is more precise because the airflow velocity and odor concentrations are estimated throughout the space of interest [7].
Simulation experiments are carried out, and the comparative result is illustrated.
Lu, “A simulation framework for plume-tracing research,” Proceedings of ACRA.