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Dynamic Free-Surface Deformations in Axisymmetric Liquid Bridges

Title
Dynamic Free-Surface Deformations in Axisymmetric Liquid Bridges
Author
김우승
Keywords
Axisymmetric liquid bridge; Thermocapillary convection; Dynamic surface deformation; OSCILLATORY THERMOCAPILLARY CONVECTION; UNDEFORMABLE CURVED SURFACES; NUMERICAL-SIMULATION; MARANGONI CONVECTION; RECTANGULAR CAVITY; ZONE CONVECTION; FLOW; INSTABILITY; VOLUME; MICROGRAVITY
Issue Date
2004-05
Publisher
ELSEVIER SCIENCE BV
Citation
ADVANCES IN SPACE RESEARCH, v. 34, No. 7, Page. 1627-1634
Abstract
Thermocapillary convection in a differentially heated liquid bridge is investigated in a two-dimensional numerical study. The deformable free surface is obtained as a solution of the coupled transport equations at fixed unit Prandtl number and aspect ratio. Only steady convection can be realized in this axisymmetric computation with either non-deformable or deformable surfaces. Dynamic free-surface deformations do not induce transitions to oscillatory convection even at large Reynolds numbers. Free surfaces are convex near the cold wall due to large surface pressures at the stagnation-point. Near the hot wall they change from concave to convex with increasing Re due to large normal viscous stresses. Large Capillary numbers cause additional surface ripples there while having little effect on the interior. Heat loss from the free surface has dramatic influence on the dynamics and must be included in theoretical models of thermocapillary instabilities.
URI
https://www.sciencedirect.com/science/article/pii/S0273117704007276#!https://repository.hanyang.ac.kr/handle/20.500.11754/141925
ISSN
0273-1177
DOI
10.1016/j.asr.2004.09.003
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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