Numerical simulation of thermocapillary convection in a half-zone liquid bridge with dynamic free surface deformation
Abstract
A large number of researches about thermocapillary convection and its transition in a half-zone liquid bridge have been conducted. Some experimental works have indicated that the free surface vibration is observed in the oscillatory flow. We present the numerical simulation with and without dynamic free surface deformation to evaluate the effect of the surface deformation upon the flow field for medium and high Pr fluids. In the simulation, the surface shape is solved by considering the stress balance on the free surface, and the calculation coordinate is reconstructed at every time step with employing boundary fitted coordinate. The free surface deformation is determined primarily by the pressure variation. For medium Pr, the effect of the surface deformation is small in the present condition. A slight difference is detected in case of the higher Pr fluid. The mutual relation among the surface deformation, the temperature, the pressure and the axial velocity is found to be different between the medium and high Pr cases.
- Publication:
-
APS Division of Fluid Dynamics Meeting Abstracts
- Pub Date:
- November 2003
- Bibcode:
- 2003APS..DFD.FQ003H