Floquet analysis of spatially periodic thermocapillary convection in a low-Prandtl-number liquid bridge

2017 ◽  
Vol 29 (7) ◽  
pp. 074104 ◽  
Author(s):  
K. Motegi ◽  
K. Fujimura ◽  
I. Ueno
Keyword(s):  
Prandtl Number ◽  
Liquid Bridge ◽  
Thermocapillary Convection ◽  
Spatially Periodic

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.

Onset of temporal aperiodicity in high Prandtl number liquid bridge under terrestrial conditions

2004 ◽  
Vol 16 (5) ◽  
pp. 1746-1757 ◽  
Author(s):  
D. E. Melnikov ◽  
V. M. Shevtsova ◽  
J. C. Legros
Keyword(s):  
Prandtl Number ◽  
Liquid Bridge ◽  
High Prandtl Number
Sign in / Sign up

Export Citation Format

Share Document