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Proceedings Paper

Three-dimensional numerical simulation of oscillatory Marangoni flow in half-zone of low-Pr fluids
Author(s): Nobuyuki Imaishi; Shouichi Yasuhiro; Tsuneyuki Sato; Shinichi Yoda
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Paper Abstract

3D unsteady numerical simulations were conducted, by means of the finite difference method, to understand the characteristics of stationary and oscillatory 3D Marangoni flows in half-zone liquid bridges of low Prandtl number fluids (Pr=0.01 and 0.02) with different aspect ratios (As=1.0, 1.2 and 1.8). The results clearly explain the transition processes; first from an axisymmetric to a 3D steady flow and the second from a 3D steady to 3D oscillatory flow. Critical Marangoni numbers for each transition as well as the frequency were determined for various conditions. These results were compared with available results of both linear stability analysis and non- linear numerical simulations. The present results agreed well with previously reported values within 6%. In a short liquid bridge, the 3D flows indicate two-fold symmetry in azimuthal direction (m=2). In a longer liquid bridge, however, there appeared a 3D flow with m=1. These basic flows become unstable against time dependent disturbances at Mac2.

Paper Details

Date Published: 6 July 1999
PDF: 9 pages
Proc. SPIE 3792, Materials Research in Low Gravity II, (6 July 1999); doi: 10.1117/12.351295
Show Author Affiliations
Nobuyuki Imaishi, Kyushu Univ. (Japan)
Shouichi Yasuhiro, Kyushu Univ. (Japan)
Tsuneyuki Sato, Kyushu Univ. (Japan)
Shinichi Yoda, National Space Development Agency of Japan (Japan)

Published in SPIE Proceedings Vol. 3792:
Materials Research in Low Gravity II
Narayanan Ramachandran, Editor(s)

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