Influence of the dynamical free surface deformation on the stability of thermal convection in high-Prandtl-number liquid bridges

2020 ◽  
Vol 146 ◽  
pp. 118831
Author(s):  
Luis M. Carrión ◽  
Miguel A. Herrada ◽  
José M. Montanero
Keyword(s):  
Free Surface ◽  
Prandtl Number ◽  
Thermal Convection ◽  
Surface Deformation ◽  
Liquid Bridges ◽  
High Prandtl Number ◽  
Free Surface Deformation ◽  
The Stability

Effect of Marangoni number on thermocapillary convection and free-surface deformation in liquid bridges

2016 ◽  
Vol 25 (2) ◽  
pp. 178-187 ◽  
Author(s):  
Yin Zhang ◽  
Hu-Lin Huang ◽  
Xiao-Ming Zhou ◽  
Gui-Ping Zhu ◽  
Yong Zou
Keyword(s):  
Free Surface ◽  
Marangoni Number ◽  
Thermocapillary Convection ◽  
Surface Deformation ◽  
Liquid Bridges ◽  
Free Surface Deformation

Influence of Ambient Airflow on Free Surface Deformation and Flow Pattern Inside Liquid Bridge With Large Prandtl Number Fluid (Pr > 100) Under Gravity

2017 ◽  
Vol 139 (12) ◽  
Author(s):  
Shuo Yang ◽  
Ruquan Liang ◽  
Song Xiao ◽  
Jicheng He ◽  
Shuo Zhang
Keyword(s):  
Free Surface ◽  
Prandtl Number ◽  
Liquid Bridge ◽  
Thermocapillary Convection ◽  
Surface Deformation ◽  
Flow Cell ◽  
Thermocapillary Force ◽  
Flow Cells ◽  
Lower Disk ◽  
Free Surface Deformation

The influence of airflow shear on the free surface deformation and the flow structure for large Prandtl number fluid (Pr = 111.67) has been analyzed numerically as the parallel airflow shear is induced into the surrounding of liquid bridge from the lower disk or the upper disk. Contrasted with former studies, an improved level set method is adopted to track any tiny deformation of free surface, where the area compensation is carried out to compensate the nonconservation of mass. Present results indicate that the airflow shear can excite flow cells in the isothermal liquid bridge. The airflow shear induced from the upper disk impulses the convex region of free interface as the airflow shear intensity is increased, which may exceed the breaking limit of liquid bridge. The free surface is transformed from the “S”-shape into the “M”-shape as the airflow shear is induced from the lower disk. For the nonisothermal liquid bridge, the flow cell is dominated by the thermocapillary convection at the hot corner if the airflow shear comes from the hot disk, and another reversed flow cell near the cold disk appears. While the shape of free surface depends on the competition between the thermocapillary force and the shear force when the airflow is induced from the cold disk.

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.

Measurement of the dynamical free surface deformation in liquid bridges

2008 ◽  
Vol 62 (8-9) ◽  
pp. 471-477 ◽  
Author(s):  
C. Ferrera ◽  
A. Mialdun ◽  
V.M. Shevtsova ◽  
M.G. Cabezas ◽  
J.M. Montanero
Keyword(s):  
Free Surface ◽  
Surface Deformation ◽  
Liquid Bridges ◽  
Free Surface Deformation
Sign in / Sign up

Export Citation Format

Share Document