The role of streamwise perturbations in pipe flow transition

2006 ◽  
Vol 18 (7) ◽  
pp. 074104 ◽  
Author(s):  
Fernando Mellibovsky ◽  
Alvaro Meseguer
Keyword(s):  
Pipe Flow ◽  
Flow Transition

DNS Study on Role of Linearly Unstable Modes in Flow Transition

2015 ◽  
Author(s):  
Jie Tang ◽  
Yonghua Yan ◽  
Yinlin Dong ◽  
Chaoqun Liu
Keyword(s):  
Flow Transition

Pulsatile pipe flow transition: Flow waveform effects

2018 ◽  
Vol 30 (1) ◽  
pp. 015111 ◽  
Author(s):  
Melissa C. Brindise ◽  
Pavlos P. Vlachos
Keyword(s):  
Pipe Flow ◽  
Flow Transition ◽  
Flow Waveform ◽  
Transition Flow

Hydrodynamic Aspects of Drag Reduction with Additives

1973 ◽  
Vol 10 (03) ◽  
pp. 284-292
Author(s):  
Paul S. Granville
Keyword(s):  
Turbulent Flow ◽  
Drag Reduction ◽  
Boundary Layers ◽  
Pipe Flow ◽  
Fundamental Properties ◽  
Flow Through ◽  
Similarity Law ◽  
Similarity Laws

The hydrodynamic aspects of drag reduction with additives are presented. The fundamental properties of this remarkable phenomenon are described. A brief history is outlined from anomalous results in pipe flow, through strange effects in the Texas oilfields and to the current research efforts. Correlation by means of the velocity similarity laws of turbulent flow is explained for drag reduction in pipe flow and for the boundary layers on bodies. The limits of drag reduction are also explained on the basis of the interactive similarity law. The peculiar role of viscoelasticity is examined. Naval architectural applications are reviewed.

Wavy-to-slug flow transition in slightly inclined gas–liquid pipe flow

AIChE Journal ◽  
1996 ◽  
Vol 42 (4) ◽  
pp. 901-909 ◽  
Author(s):  
Eric Grolman ◽  
Niels C. J. Commandeur ◽  
Eduard C. de Baat ◽  
Jan M. H. Fortuin
Keyword(s):  
Pipe Flow ◽  
Slug Flow ◽  
Flow Transition

Surfactant Use for Slug Flow Pattern Suppression in a Horizontal Pipe

2003 ◽  
Author(s):  
R. J. Wilkens ◽  
S. R. Glassmeyer ◽  
G. J. Rosebrock ◽  
K. M. Storage ◽  
T. M. Storage
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Pipe Flow ◽  
Slug Flow ◽  
Flow Patterns ◽  
Flow Transition ◽  
Horizontal Pipe ◽  
Surfactant Additive ◽  
Gas Liquid Flow

A set of experiments was performed to study flow pattern suppression in gas-liquid pipe flow by means of surfactant additive. Results suggest that addition of the surfactant to gas-liquid flow significantly reduces the occurrence of slug flow. In addition, previously unreported flow patterns were observed to exist between slug and dispersed bubble flows. It is concluded that new mechanisms for slug flow transition need to be considered.

Transient Gas-Liquid Flow in Upward Sloping Pipes, Approaching the Wavy-to-Slug Flow Transition

1996 ◽  
Vol 118 (4) ◽  
pp. 729-735 ◽  
Author(s):  
Eric Grolman ◽  
Jan M. H. Fortuin
Keyword(s):  
Steady State ◽  
Pipe Flow ◽  
Slug Flow ◽  
Transient Behavior ◽  
Hyperbolic Partial Differential Equations ◽  
Shear Stresses ◽  
Flow Transition ◽  
Interfacial Areas ◽  
On Line ◽  
Gas Liquid Flow

A model is presented for transient, cocurrent gas-liquid pipe flow in the stratified-smooth and stratified-wavy flow regimes. It is based on the equations of continuity and motion in the direction of flow and results in two hyperbolic partial differential equations, which are solved numerically using the combined methods of lines (Schiesser, 1991) and characteristics (Stoker, 1957). In wavy gas-liquid pipe flow, three different interfacial areas and corresponding shear stresses are identified. Three friction-factor correlations were derived on the basis of an extensive set of 2500 steady-state measurements. The transient behavior of inclined gas-liquid pipe flow is successfully simulated and compares well with the results obtained from on-line measurements, right up to the onset of slug flow.

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