Negative vortices: The formation of vortex rings with reversed rotation in viscoelastic liquids

2015 ◽  
Vol 27 (5) ◽  
pp. 051703 ◽  
Author(s):  
Carlos Palacios-Morales ◽  
Christophe Barbosa ◽  
Francisco Solorio ◽  
Roberto Zenit
Keyword(s):  
Vortex Rings ◽  
Reversed Rotation ◽  
Viscoelastic Liquids

Flow of Viscoelastic Liquids through Sudden Enlargements

1966 ◽  
Vol 5 (2) ◽  
pp. 237-242 ◽  
Author(s):  
Gianni Astarita ◽  
Luigi Nicodemo
Keyword(s):  
Viscoelastic Liquids

scholarly journals Vortex rings drive entrainment and cooling in flow induced by a spark discharge

2020 ◽  
Vol 5 (11) ◽  
Author(s):  
Bhavini Singh ◽  
Lalit K. Rajendran ◽  
Jiacheng Zhang ◽  
Pavlos P. Vlachos ◽  
Sally P. M. Bane
Keyword(s):  
Spark Discharge ◽  
Vortex Rings

scholarly journals Formation number of confined vortex rings

2018 ◽  
Vol 3 (9) ◽  
Author(s):  
I. Danaila ◽  
F. Luddens ◽  
F. Kaplanski ◽  
A. Papoutsakis ◽  
S. S. Sazhin
Keyword(s):  
Vortex Rings ◽  
Formation Number

Effect of confinement on the decay of vortex rings

2019 ◽  
Vol 94 (8) ◽  
pp. 084001
Author(s):  
R Sooraj ◽  
A Sameen
Keyword(s):  
Vortex Rings

The nonlinear interaction of vortex rings with a free surface

1997 ◽  
Vol 13 (2) ◽  
pp. 120-129 ◽  
Author(s):  
Ye Quyuan ◽  
C. K. Chu
Keyword(s):  
Free Surface ◽  
Nonlinear Interaction ◽  
Vortex Rings

Elastic Effects on Rayleigh-Be´nard-Marangoni Convection in Liquids With Temperature-Dependent Viscosity

2009 ◽  
Author(s):  
G. N. Sekhar ◽  
G. Jayalatha
Keyword(s):  
Stress Relaxation ◽  
Variable Viscosity ◽  
Relaxation Parameter ◽  
Oscillatory Convection ◽  
Tight Coupling ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Dependent Viscosity ◽  
Viscoelastic Liquids ◽  
Retardation Parameter

A linear stability analysis of convection in viscoelastic liquids with temperature-dependent viscosity is studied using normal modes and Galerkin method. Stationary convection is shown to be the preferred mode of instability when the ratio of strain retardation parameter to stress relaxation parameter (elasticity ratio) is greater than unity. When the ratio is less than unity the possibility of oscillatory convection is shown to arise. Oscillatory convection is studied numerically for Rivlin-Ericksen, Walters B′, Maxwell and Jeffreys liquids by considering free-free and rigid-free isothermal/adiabatic boundaries. It is found that there is a tight coupling between the Rayleigh and Marangoni numbers, with an increase in one resulting in a decrease in the other. The effect of variable viscosity parameter is shown to destabilize the system. The problem reveals the stabilizing nature of strain retardation parameter and destabilizing nature of stress relaxation parameter, on the onset of convection. The Maxwell liquids are found to be more unstable than the one subscribing to Jeffreys description whereas the Rivlin-Ericksen and Walters B′ liquids are comparatively more stable. Rigid-free adiabatic boundary combination is found to give rise to a most stable system, whereas the free isothermal free adiabatic combination gives rise to a most unstable system. The problem has applications in non-isothermal systems having viscoelastic liquids as working media.

Bubble velocity and coalescence in viscoelastic liquids

1986 ◽  
Vol 41 (9) ◽  
pp. 2273-2283 ◽  
Author(s):  
D. Dekée ◽  
P.J. Carreau ◽  
J. Mordarski
Keyword(s):  
Bubble Velocity ◽  
Viscoelastic Liquids
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