Bénard–Marangoni convection in a small circular container: influence of the Biot and Prandtl numbers on pattern dynamics and free surface deformation

2007 ◽  
Vol 43 (4) ◽  
pp. 547-554 ◽  
Author(s):  
S. Rahal ◽  
P. Cerisier ◽  
H. Azuma
Keyword(s):  
Free Surface ◽  
Surface Deformation ◽  
Marangoni Convection ◽  
Pattern Dynamics ◽  
Free Surface Deformation ◽  
Prandtl Numbers

Flow Visualization and Pattern Dynamics in Be´nard-Marangoni Convection

2006 ◽  
Author(s):  
Samir Rahal ◽  
Hisao Azuma
Keyword(s):  
Free Surface ◽  
Aspect Ratio ◽  
Prandtl Number ◽  
Surface Deformation ◽  
Marangoni Convection ◽  
Temperature Fields ◽  
Pattern Dynamics ◽  
Free Surface Deformation ◽  
Prandtl Numbers ◽  
Biot Numbers

The aim of this experimental work is to study the pattern dynamics in the Be´nard-Marangoni convection. The free surface deformation fields were visualized by interferometry and the temperature fields by infrared thermography. The influence of the aspect ratio, Rayleigh, Biot and Prandtl numbers, was considered. More dynamics are found to be induced by increasing the Biot number. Conversely, increasing the Prandtl number reduces the dynamics. The deformation magnitude and the wavenumber increase as functions of the gradient of temperature. Two behaviours of the deformation, as a function of Prandtl and Biot numbers, were observed, depending on the value of the gradient of temperature.

Free-surface deformation measurement

1997 ◽  
Author(s):  
H. Stahl ◽  
Kevin Stultz ◽  
H. Stahl ◽  
Kevin Stultz
Keyword(s):  
Free Surface ◽  
Surface Deformation ◽  
Deformation Measurement ◽  
Free Surface Deformation

Numerical Analysis of Free Surface Deformation in Water Tank

2003 ◽  
Author(s):  
Fumio Shimizu ◽  
Kiyoshi Hatakenaka ◽  
Kazuhiro Tanaka ◽  
Hiroshi Shigefuji ◽  
Takeshi Shimizu
Keyword(s):  
Free Surface ◽  
Large Scale ◽  
Surface Deformation ◽  
Internal Flow ◽  
Oscillating Flow ◽  
Water Tank ◽  
Loud Noise ◽  
Two Phase ◽  
Free Surface Deformation ◽  
Good Agreement

A siphon phenomenon is one of gas/liquid two-phase flows including free surface deformation. Since the large-scale deformation of the free surface causes a loud noise, it is important to investigate the motion of the free surface. The purpose of the present study is to reproduce a siphon phenomenon in computer, and to analyze an internal flow field of the siphon phenomenon. An oscillating flow in two-dimensional U-tube was simulated to verify our computational codes, and good agreement compared with the theoretical period was obtained. After that, the numerical reproduction of a siphon phenomenon was succeeded and the behavior of the free surface was captured reasonably.

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