scholarly journals On the origin of the centreline velocity overshoot in the entrance region of a turbulent pipe flow

2022 ◽  
Vol 172 ◽  
pp. 107256
Author(s):  
Joshua Bopp ◽  
Daniel A. Weiss
Keyword(s):  
Pipe Flow ◽  
Turbulent Pipe Flow ◽  
Entrance Region ◽  
Velocity Overshoot ◽  
Centreline Velocity

184 Development of Thermal Field in Thermal Entrance Region of Turbulent Pipe Flow via DNS

2015 ◽  
Vol 2015.64 (0) ◽  
pp. _184-1_-_184-2_
Author(s):  
Hirofumi HATTORI ◽  
Ayumi Hoshaku ◽  
Tomoya HOURA ◽  
Masato TAGAWA
Keyword(s):  
Pipe Flow ◽  
Thermal Field ◽  
Turbulent Pipe Flow ◽  
Entrance Region ◽  
Thermal Entrance Region ◽  
Thermal Entrance

Particle Destabilization in Turbulent Pipe Flow

1989 ◽  
Vol 21 (6-7) ◽  
pp. 435-442 ◽  
Author(s):  
B. Döll
Keyword(s):  
Pipe Flow ◽  
Reaction Rate ◽  
Turbulent Pipe Flow ◽  
Cationic Polymers ◽  
Flow Conditions ◽  
Polyelectrolyte Adsorption ◽  
Charge Neutralization ◽  
Silica Suspensions ◽  
Kinetics Of ◽  
Turbulent Flow Conditions

Silica suspensions (pH = 6.8) and three different cationic polymers were used to study the kinetics of charge neutralization by polyelectrolyte adsorption. The experiments were performed in a continuous flow pipe reactor under steady state turbulent flow conditions. The charge neutralization was monitored by electrophoretic mobility (EPM) measurements of the suspended particles as a function of time after polyelectrolyte audition. The results show the dependency of the destabilization reaction rate on flow and polymer characteristics.

scholarly journals Intermediate scaling and logarithmic invariance in turbulent pipe flow

2021 ◽  
Vol 913 ◽  
Author(s):  
Sourabh S. Diwan ◽  
Jonathan F. Morrison
Keyword(s):  
Pipe Flow ◽  
Turbulent Pipe Flow

Abstract

scholarly journals Experimental and theoretical progress in pipe flow transition

2008 ◽  
Vol 366 (1876) ◽  
pp. 2671-2684 ◽  
Author(s):  
A.P Willis ◽  
J Peixinho ◽  
R.R Kerswell ◽  
T Mullin
Keyword(s):  
Pipe Flow ◽  
Quantitative Agreement ◽  
Travelling Wave ◽  
Turbulent Pipe Flow ◽  
Transition To Turbulence ◽  
Reynolds Number Flow ◽  
Threshold Amplitude ◽  
Number Flow ◽  
The Stability ◽  
Laminar State

There have been many investigations of the stability of Hagen–Poiseuille flow in the 125 years since Osborne Reynolds' famous experiments on the transition to turbulence in a pipe, and yet the pipe problem remains the focus of attention of much research. Here, we discuss recent results from experimental and numerical investigations obtained in this new century. Progress has been made on three fundamental issues: the threshold amplitude of disturbances required to trigger a transition to turbulence from the laminar state; the threshold Reynolds number flow below which a disturbance decays from turbulence to the laminar state, with quantitative agreement between experimental and numerical results; and understanding the relevance of recently discovered families of unstable travelling wave solutions to transitional and turbulent pipe flow.

Rapid temporal acceleration of a turbulent pipe flow

2004 ◽  
Vol 514 ◽  
pp. 65-75 ◽  
Author(s):  
DAVID GREENBLATT ◽  
EDWARD A. MOSS
Keyword(s):  
Pipe Flow ◽  
Turbulent Pipe Flow
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