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Online since: April 2016
Authors: Severino Rodrigues de Farias Neto, Antonio Gilson Barbosa de Lima, Cidronia Janiclebia de O. Buriti, Lígia Rafaely Barbosa Sarmento, Gicélia Moreira
Thermofluidodynamic evaluation of oil-water flow in the presence of a leak in curved connection: modeling and simulation
Cidronia Janiclebia de O.
ajaneburiti@yahoo.com.br, b ligiarafaely@gmail.com, cg.moreira@ufcg.edu.br, dfariasn@deq.ufcg.edu.br, eagblima@pq.cnpq.br Keywords: Two-phase flow; Connections; Leak; Numerical simulation; CFX.
In Fig. 2 the numerical mesh is shown with details in the vicinity of the leak hole generated using ICEM CFD v12.1.
The physico-chemical properties of the fluids at 293K used in the simulations are shown in Table 2.
For cases in which there is leakage (where transient flow regime) simulations for a maximum flow time of 0.1 s, the following boundary conditions were used: It was considered that the tube is initially filled with oil and water then the flow is fully developed
ajaneburiti@yahoo.com.br, b ligiarafaely@gmail.com, cg.moreira@ufcg.edu.br, dfariasn@deq.ufcg.edu.br, eagblima@pq.cnpq.br Keywords: Two-phase flow; Connections; Leak; Numerical simulation; CFX.
In Fig. 2 the numerical mesh is shown with details in the vicinity of the leak hole generated using ICEM CFD v12.1.
The physico-chemical properties of the fluids at 293K used in the simulations are shown in Table 2.
For cases in which there is leakage (where transient flow regime) simulations for a maximum flow time of 0.1 s, the following boundary conditions were used: It was considered that the tube is initially filled with oil and water then the flow is fully developed
Online since: September 2013
Authors: Dao Tao Lei, Shi Ming Wang
Design and Experimental Research of a New Horizontal
Wave and Flow Generation Device
Shiming Wang a,Daotao Lei*b
College of Engineering, Shanghai Ocean University,Shanghai, China
aemail: smwang@shou.edu.cn, bemail:465363502@qq.com
Keywords: Energy crisis, Ocean energy, Model simulation, Turbine, Power generation
Abstract.
Figure 5 (a), (b) are given a five-blade and six-blade flow field analysis to use fluent6.3[8-10]software for a two-dimensional flow field numerical simulation ,which makes comparison of the influence of diffenent number of blades on flow field.
ANSYS13.0 Workbench numerical simulation technology[M].
Fluent12 fluid analysis and engineering simulation [M].
The design of ocean data buoys on CFD [J].
Figure 5 (a), (b) are given a five-blade and six-blade flow field analysis to use fluent6.3[8-10]software for a two-dimensional flow field numerical simulation ,which makes comparison of the influence of diffenent number of blades on flow field.
ANSYS13.0 Workbench numerical simulation technology[M].
Fluent12 fluid analysis and engineering simulation [M].
The design of ocean data buoys on CFD [J].
Online since: October 2014
Authors: Wen Ping Zhang, Ping Jian Ming, Li Jian Zhang
The numerical method was also used to flow simulation with different attack angle and side angle, and numerical results were consistent with conclusion in the literature.
CFD (Computational Fluid Dynamics) is one of them, and many scholars at home and abroad study secondary flow phenomena using it.Ding Jue [3] and some investigators studied the flow and its characteristics in bending tube based on the structured grid theory model.
This paper uses simulation carried out to verify the experimental data.
Conclusion (1) This paper ,using numerical simulation method, study the fluid flow characteristics of square cross section bending the pipe.
Numerical simulation of theorectical models & flow characteristics in 900 bending duct.
CFD (Computational Fluid Dynamics) is one of them, and many scholars at home and abroad study secondary flow phenomena using it.Ding Jue [3] and some investigators studied the flow and its characteristics in bending tube based on the structured grid theory model.
This paper uses simulation carried out to verify the experimental data.
Conclusion (1) This paper ,using numerical simulation method, study the fluid flow characteristics of square cross section bending the pipe.
Numerical simulation of theorectical models & flow characteristics in 900 bending duct.
Online since: March 2017
Authors: Lober Hermany, Rafael José Klein, Flavia Schwarz Franceschini Zinani, Liércio André Isoldi, Elizaldo Domingues dos Santos, Luiz Alberto Oliveira Rocha
Rao et al. [7] performed numerical simulations of laminar flow of shear-thinning fluids modeled by the power-law model across elliptical section tubes.
In the present work, the heat transfer from elliptical section tubes arranged in a row to viscoplastic fluids in cross flow is investigated using computational fluid dynamics (CFD).
The measure of heat transfer provided in each case is given by the average Nusselt number based on the square root of the ellipse area, defined as , (10) where qw is the heat transfer rate of the tube wall, Le Is the ellipse perimeter calculated as [18] , (11) where e is the ellipse eccentricity, calculated as (12) For the numerical solution, the CFD ANSYS/FLUENT software was used.
In this work numerical simulations were carried out with meshes of different degrees of refinement and the obtained solutions were compared.
“Numerical simulation and global linear stability analysis of low-Re past a heated circular cylinder.”
In the present work, the heat transfer from elliptical section tubes arranged in a row to viscoplastic fluids in cross flow is investigated using computational fluid dynamics (CFD).
The measure of heat transfer provided in each case is given by the average Nusselt number based on the square root of the ellipse area, defined as , (10) where qw is the heat transfer rate of the tube wall, Le Is the ellipse perimeter calculated as [18] , (11) where e is the ellipse eccentricity, calculated as (12) For the numerical solution, the CFD ANSYS/FLUENT software was used.
In this work numerical simulations were carried out with meshes of different degrees of refinement and the obtained solutions were compared.
“Numerical simulation and global linear stability analysis of low-Re past a heated circular cylinder.”
Online since: October 2010
Authors: Vittorio Colombo, Emanuele Ghedini, Paolo Sanibondi
All computations have been performed using a customized version of the CFD commercial code FLUENT©.
The main advantage of LES is that the entrainment of every single cold eddy can be taken into account in the simulation, so allowing the calculation of particle trajectories using non-average flow and temperature fields.
Two sets of simulations have been carried out at 3 MHz and 13.56 MHz, respectively, with different powder feed rates.
The effects of the fluctuations on the particle stream between two arc anode reattachments have been investigated using arc temperature and flow fields predicted from simulations.
Conclusions Three-dimensional models of a commercial ICP torch and of a DC plasma spray torch have been developed using a commercial CFD software (FLUENT) to investigate thermal histories and trajectories of treated powders.
The main advantage of LES is that the entrainment of every single cold eddy can be taken into account in the simulation, so allowing the calculation of particle trajectories using non-average flow and temperature fields.
Two sets of simulations have been carried out at 3 MHz and 13.56 MHz, respectively, with different powder feed rates.
The effects of the fluctuations on the particle stream between two arc anode reattachments have been investigated using arc temperature and flow fields predicted from simulations.
Conclusions Three-dimensional models of a commercial ICP torch and of a DC plasma spray torch have been developed using a commercial CFD software (FLUENT) to investigate thermal histories and trajectories of treated powders.
Online since: November 2010
Authors: Guo Liang Hu, Ju Xing Liang, Ai Min Hu
China
aglhu2006@163.com, bhamtz123@163.com, cjuxxi741@126.com
Keywords: Liquamatic fire water monitor, Self-swinging, Structural parameters, Flow field simulation, Jet characteristics.
These simulation results will provide useful theoretical guidance for design of other types of fire water monitor.
The opening of nozzle can be adjusted by a handle operation, which can determine direct jet or spray jet. 1.monitor head 2.handle operation device 3.outlet pipe 4.location and locking device 5.inlet pipe 6.connecting rod 7.disk drive 8.bevel gear 9.driven shell 10.impeller 11.monitor feet 12.monitor base 13.feet mechanism Fig. 1 Structure of the liquamatic fire water monitor with self-swinging device Simulation Analysis of Structural Parameters on Jet Characteristics Fluent software, as one of the general CFD softwares, is used to simulate complex flow, ranging from incompressible fluid to highly compressible fluid [4].
Fig. 2 Circular flow channel model Fig. 3 Square flow channel model Fig. 4 and Fig. 5 show the velocity flow simulation under different cross-sectional shape of the monitor body.
(a) d=60mm (b) d=65mm Fig. 8 Velocity flow in the bent pipe Fig. 8 shows the velocity flow simulation at diameter of 60mm and 65mm in the bent pipe.
These simulation results will provide useful theoretical guidance for design of other types of fire water monitor.
The opening of nozzle can be adjusted by a handle operation, which can determine direct jet or spray jet. 1.monitor head 2.handle operation device 3.outlet pipe 4.location and locking device 5.inlet pipe 6.connecting rod 7.disk drive 8.bevel gear 9.driven shell 10.impeller 11.monitor feet 12.monitor base 13.feet mechanism Fig. 1 Structure of the liquamatic fire water monitor with self-swinging device Simulation Analysis of Structural Parameters on Jet Characteristics Fluent software, as one of the general CFD softwares, is used to simulate complex flow, ranging from incompressible fluid to highly compressible fluid [4].
Fig. 2 Circular flow channel model Fig. 3 Square flow channel model Fig. 4 and Fig. 5 show the velocity flow simulation under different cross-sectional shape of the monitor body.
(a) d=60mm (b) d=65mm Fig. 8 Velocity flow in the bent pipe Fig. 8 shows the velocity flow simulation at diameter of 60mm and 65mm in the bent pipe.
Online since: October 2010
Authors: Alain Dollet, Eric Casenove, Loic Pujol, Alexis Vossier, Arnaud Perona, Vincent Goetz
Experiments and simulations were carried out to assess a passive device for cooling photovoltaic cells under concentrated sunlight.
Its interest for CPV applications was assessed by performing heat transfer simulations in combination with experimental measurements.
A second simulation was performed for a pure Al enclosure (see text).
Numerical simulations.
Xu, "Modeling Phase Change Material in Electronics using CFD- A case study", Proc.
Its interest for CPV applications was assessed by performing heat transfer simulations in combination with experimental measurements.
A second simulation was performed for a pure Al enclosure (see text).
Numerical simulations.
Xu, "Modeling Phase Change Material in Electronics using CFD- A case study", Proc.
Online since: July 2015
Authors: Sterian Danaila, Dragoș Isvoranu
Preliminary Simulation of the Flow in the Root Canal
Using New Irrigation Needle
Dragos ISVORANU1, a *and Sterian DANAILA1,b
1Elie Carafoli Dept. of Aerospace Sciences, University Politehnica of Bucharest,
1, Gheorghe Polizu Street, 011061-Bucharest, ROMANIA
adragos.isvoranu@upb.ro, bsterian.danaila@upb.ro
Keywords: irrigation needle, two-phase fluid flow, root canal, wetting properties
Abstract.
Our simulation results show great efficiency of the irrigation procedure in terms of the irrigant volume fraction and wall shear stress at the wall of the root canal over entire working length.
This assertion is acknowledged in literature, see for example [9], but no one has ever considered this stage as an indispensable prerequisite for a reliable simulation of the fluid mechanics of the irrigation process.
Previous CFD investigations in root canal irrigation [1, 8, 9, 10, 11, 12, 13, 14] considered only irrigant mass flow rate, size and type of the needle and the distance between the tip of needle and the apical foramen as analysis parameters.
The simulation is performed within Ansys CFX environment.
Our simulation results show great efficiency of the irrigation procedure in terms of the irrigant volume fraction and wall shear stress at the wall of the root canal over entire working length.
This assertion is acknowledged in literature, see for example [9], but no one has ever considered this stage as an indispensable prerequisite for a reliable simulation of the fluid mechanics of the irrigation process.
Previous CFD investigations in root canal irrigation [1, 8, 9, 10, 11, 12, 13, 14] considered only irrigant mass flow rate, size and type of the needle and the distance between the tip of needle and the apical foramen as analysis parameters.
The simulation is performed within Ansys CFX environment.
Online since: December 2012
Authors: Ang Li, Jin Yun Pu, Yue Hou
CFD software FLUENT is a mature Fluid Dynamics Analysis of software.
In so doing, fluent in fact acts as a general fluid dynamic simulation module.
In collaborative simulation model, the simulation conditions of FLUENT and MATLAB are determined by the real operating conditions of the current system solution, and therefore the accuracy and credibility of the simulation are substantially improved.
Beijing, journal of system simulation, Volume 19th issue 8th.
Theory and Simulation of turbulence.
In so doing, fluent in fact acts as a general fluid dynamic simulation module.
In collaborative simulation model, the simulation conditions of FLUENT and MATLAB are determined by the real operating conditions of the current system solution, and therefore the accuracy and credibility of the simulation are substantially improved.
Beijing, journal of system simulation, Volume 19th issue 8th.
Theory and Simulation of turbulence.
Online since: October 2013
Authors: Zhuo Lei, Jie Liu, Li Bin Du, Hai Jing He
In this paper, we use numerical simulation method to analysis the underwater motion attitude of XBT probe.
Numerical simulation results Drag and lift characteristics analysis.
Since the numerical simulation of the process, no slip angle sensor, so there will be no lateral force substantially only drag and lift.
Numerical Simulation the Flow Field of Expendable Current Profiler[J].
CFD based flowfield analysis of an expendable bathythermographs probe[J].
Numerical simulation results Drag and lift characteristics analysis.
Since the numerical simulation of the process, no slip angle sensor, so there will be no lateral force substantially only drag and lift.
Numerical Simulation the Flow Field of Expendable Current Profiler[J].
CFD based flowfield analysis of an expendable bathythermographs probe[J].