Experimental study of the global flow-state transformation in a rectangular Rayleigh-Bénard sample

2018 ◽  
Vol 126 ◽  
pp. 1333-1346 ◽  
Author(s):  
G.M. Horstmann ◽  
D. Schiepel ◽  
C. Wagner
Keyword(s):  
Experimental Study ◽  
Flow State ◽  
Global Flow ◽  
State Transformation ◽  
Rayleigh Benard

scholarly journals Visualization of the global flow structure in a modified Rayleigh-Bénard setup using contactless inductive flow tomography

2018 ◽  
Vol 62 ◽  
pp. 269-280 ◽  
Author(s):  
Thomas Wondrak ◽  
Josef Pal ◽  
Frank Stefani ◽  
Vladimir Galindo ◽  
Sven Eckert
Keyword(s):  
Flow Structure ◽  
Global Flow ◽  
Rayleigh Benard

Numerical and Experimental Study of Rayleigh–Bénard–Kelvin Convection

2013 ◽  
Vol 92 (1-2) ◽  
pp. 371-393 ◽  
Author(s):  
S. Kenjereš ◽  
L. Pyrda ◽  
E. Fornalik-Wajs ◽  
J. S. Szmyd
Keyword(s):  
Experimental Study ◽  
Rayleigh Benard

Experimental study of the velocity field in Rayleigh-Bénard convection

1978 ◽  
Vol 85 (4) ◽  
pp. 641-653 ◽  
Author(s):  
M. Dubois ◽  
P. Bergé
Keyword(s):  
Experimental Study ◽  
Velocity Field ◽  
Local Velocity ◽  
Velocity Measurements ◽  
Bénard Convection ◽  
Benard Convection ◽  
Theoretical Predictions ◽  
Rayleigh Benard Convection ◽  
Rayleigh Benard ◽  
Velocity Mode

Local velocity measurements performed in a convecting layer of fluid show that the velocity field can be described by a dominant fundamental velocity mode mixed with an increasing proportion of second and third harmonics as ε, the reduced distance to the convective thresholdRc, is increased from 0 to ∼ 10. The spatial and thermal dependences of the amplitudes of these different modes are reported and compared with theoretical predictions.

scholarly journals The effect of surfactant solutions on flow structures in turbulent Rayleigh-Benard convection

2018 ◽  
Vol 22 (Suppl. 2) ◽  
pp. 507-515 ◽  
Author(s):  
Tongzhou Wei ◽  
Weihua Cai ◽  
Changye Huang ◽  
Hongna Zhang ◽  
Wentao Su ◽  
...  
Keyword(s):  
Experimental Study ◽  
Large Scale ◽  
Particle Image ◽  
Surfactant Solution ◽  
Flow Structures ◽  
Large Scale Circulation ◽  
Surfactant Solutions ◽  
Image Velocimetry ◽  
Rayleigh Benard Convection ◽  
Rayleigh Benard

This paper presents an experimental study on the flow structures in turbulent Rayleigh-B?nard convection with surfactant solutions. The shadowgraph visualization was used to obtain the plumes and the velocity field was measured using particle image velocimetry. The results show that the size of plumes in surfactant solution case is larger than that in Newtonian fluid case and it needs more time for surfactant solution case to start convection. The large-scale circulation fails to form in surfactant solution case and the convection velocity is smaller. A decrease of the measured Nusselt number is observed in surfactant solution case. The above phenomena are caused by the shear-shinning and elastic chara cteristics of surfactant solution.

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