Numerical study of the blockage length effect on the transient wave in pipe flows

2018 ◽  
Vol 56 (2) ◽  
pp. 245-255 ◽  
Author(s):  
Ming Zhao ◽  
Mohamed S. Ghidaoui ◽  
Moez Louati ◽  
Huan-Feng Duan
Keyword(s):  
Numerical Study ◽  
Transient Wave ◽  
Length Effect ◽  
Pipe Flows

scholarly journals Numerical study of upward particulate pipe flows at a constant Reynolds number

2012 ◽  
Vol 62 (2) ◽  
pp. 97
Author(s):  
A Kartushinsky ◽  
Y Rudi ◽  
S Tisler ◽  
I Shcheglov ◽  
A Shablinsky
Keyword(s):  
Reynolds Number ◽  
Numerical Study ◽  
Pipe Flows

scholarly journals Numerical study of the flow around a circular cylinder with the slip length boundary effect at a critical Reynolds number

2021 ◽  
Vol 2119 (1) ◽  
pp. 012002
Author(s):  
A. Sentyabov ◽  
A. Gavrilov ◽  
A. Dekterev
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
Critical Reynolds Number ◽  
Numerical Study ◽  
Slip Length ◽  
Boundary Effect ◽  
Flow Patterns ◽  
Length Effect ◽  
Model Calculations ◽  
Sst Model

Abstract The paper presents an investigation of the slip length effect on the flow around a circular cylinder at Reynolds number Re = 2.5·105. The study was performed by means of numerical simulation of the flow with the URANS approach based on the k-ω SST model. Calculations show a significant effect of the slip length on the flow patterns. With an increase in the slip length, the drag coefficient noticeably decreases and the pulsations of the lift force reduce. With an increase in the slip length, the separation of the flow from the cylinder is delayed, which significantly affects the flow patterns in the wake behind the cylinder.

Numerical study of the heater length effect on the heating of a solid circular obstruction centered in an open cavity

2013 ◽  
Vol 42 ◽  
pp. 176-185 ◽  
Author(s):  
G.E. Ovando-Chacon ◽  
S.L. Ovando-Chacon ◽  
J.C. Prince-Avelino ◽  
M.A. Romo-Medina
Keyword(s):  
Numerical Study ◽  
Open Cavity ◽  
Length Effect ◽  
Heater Length

Numerical Study on Turbulence Modification in Particle-Laden Pipe Flows

2011 ◽  
Vol 130-134 ◽  
pp. 3603-3606
Author(s):  
Fu Sheng Yan ◽  
Wei Jun Zhang ◽  
Ru Quan Liang
Keyword(s):  
Experimental Data ◽  
Turbulent Flows ◽  
Pipe Flow ◽  
Numerical Study ◽  
Vertical Pipe ◽  
Pipe Flows ◽  
Dilute Gas ◽  
Turbulence Modification ◽  
Proposed Model ◽  
Simulation Results

This investigation deals with the study on the processes involved in the phenomenon about turbulence modification in dilute gas-particle turbulent flows. The proposed model, along with other selected turbulence modification models from the literature, is used to simulate a particle-laden vertical pipe flow. The simulation results show that the new model provides improved predictions of the experimental data.

The Effect of Gaseous Cavitation on Fluid Transients

1979 ◽  
Vol 101 (1) ◽  
pp. 79-86 ◽  
Author(s):  
D. C. Wiggert ◽  
M. J. Sundquist
Keyword(s):  
Void Fraction ◽  
Wave Motion ◽  
Method Of Characteristics ◽  
Wave Dispersion ◽  
Gas Release ◽  
Transient Wave ◽  
Pipe Flows ◽  
Two Component ◽  
Fluid Transients ◽  
The Difference

Gaseous cavitation, alternately termed gas release, is investigated for turbulent pipe flows subjected to transient wave motion. Experimental data are presented that exhibit developing two-component flow (air or carbon dioxide and water mixtures) in a 295 m laboratory pipeline; the flow is characterized by wave dispersion due to the increase in void fraction. An analytical model based on the method of characteristics yields simultaneous solutions for pressure, velocity and void fraction. The greatest uncertainty in the formulation is the rate of gas release; here it is allowed to depend upon the difference between saturation and instantaneous line pressures.

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