Reorientations of the large-scale flow in turbulent convection in a cube

2017 ◽  
Vol 95 (3) ◽  
Author(s):  
N. Foroozani ◽  
J. J. Niemela ◽  
V. Armenio ◽  
K. R. Sreenivasan
Keyword(s):  
Large Scale ◽  
Turbulent Convection ◽  
Large Scale Flow

Coherent large–scale flow structures in turbulent convection

2008 ◽  
pp. 606-608
Author(s):  
C. Resagk ◽  
R. du Puits ◽  
E. Lobutova ◽  
A. Maystrenko ◽  
A. Thess
Keyword(s):  
Large Scale ◽  
Turbulent Convection ◽  
Flow Structures ◽  
Large Scale Flow

Large-scale flow in turbulent convection: a mathematical model

1986 ◽  
Vol 170 ◽  
pp. 385-410 ◽  
Author(s):  
L. N. Howard ◽  
R. Krishnamurti
Keyword(s):  
Mathematical Model ◽  
Large Scale ◽  
Laboratory Experiments ◽  
Boussinesq Equations ◽  
Time Dependent ◽  
Heteroclinic Orbits ◽  
Turbulent Convection ◽  
Mean Flow ◽  
Dependent Flow ◽  
Large Scale Flow

A mathematical model of convection, obtained by truncation from the two-dimensional Boussinesq equations, is shown to exhibit a bifurcation from symmetrical cells to tilted non-symmetrical ones. A subsequent bifurcation leads to time-dependent flow with similarly tilted transient plumes and a large-scale Lagrangian mean flow. This change of symmetry is similar to that occurring with the advent of a large-scale flow and transient tilted plumes seen in laboratory experiments on turbulent convection at high Rayleigh number. Though not intended as a description of turbulent convection, the model does bring out in a theoretically tractable context the possibility of the spontaneous change of symmetry suggested by the experiments.Further bifurcations of the model lead to stable chaotic phenomena as well. These are numerically found to occur in association with heteroclinic orbits. Some mathematical results clarifying this association are also presented.

scholarly journals Large-scale flow and Reynolds numbers in the presence of boiling in locally heated turbulent convection

2017 ◽  
Vol 2 (7) ◽  
Author(s):  
Paul B. J. Hoefnagels ◽  
Ping Wei ◽  
Daniela Narezo Guzman ◽  
Chao Sun ◽  
Detlef Lohse ◽  
...  
Keyword(s):  
Large Scale ◽  
Reynolds Numbers ◽  
Turbulent Convection ◽  
Large Scale Flow

scholarly journals On Estimating Fluxes due to Small-Scale Turbulent Convection in a Rotating Star

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
D. O. Gough
Keyword(s):  
Large Scale ◽  
Convection Zone ◽  
Turbulent Fluxes ◽  
Turbulent Convection ◽  
Small Scale ◽  
The Sun ◽  
Mixing Length ◽  
Large Scale Flow ◽  
Rotating Star ◽  
The Way

The way in which turbulent fluxes are usually represented in computations of large-scale flow in the convection zones of the sun and other stars is briefly described. A model of an ensemble of eddies that is capable of generalization to circumstances more complicated than the usual essentially spherically symmetrical convection zone is outlined. Generalization usually requires the introduction of new postulates, and, in so doing, also lays bare some of the assumptions, often implicit, in the usual mixing-length formalisms.

Large-scale flow field visualization for aneurysm treatment

2001 ◽  
Vol 9 (1) ◽  
pp. 3-7
Author(s):  
Damon Liu ◽  
Mark Burgin ◽  
Walter Karplus ◽  
Daniel Valentino
Keyword(s):  
Flow Field ◽  
Large Scale ◽  
Aneurysm Treatment ◽  
Large Scale Flow
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