Experiment on multimode feedback control of non-linear thermocapillary convection in a half-zone liquid bridge

被引：0
|
作者：
Kudo, M
Shiomi, J
Ueno, I
Amberg, G
Kawamura, H
机构：
[1] Tokyo Univ Sci, Fac Sci & Technol, Dept Mech Engn, Noda, Chiba 2788510, Japan
[2] Univ Tokyo, Dept Mech Engn, Bunkyo Ku, Tokyo 1138656, Japan
[3] Royal Inst Technol, Dept Mech, S-10044 Stockholm, Sweden
来源：
LOW GRAVITY PHENOMENA AND CONDENSED MATTER EXPERIMENTS IN SPACE | 2005年 / 36卷 / 01期
关键词：
non-linear thermocapillary convection; feedback control; half-zone liquid bridge; modal structure;
D O I：
10.1016/j.asr.2005.05.046
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Feedback control on was carried out on non-linear thermocapillary convections in a half-zone liquid bridge of a high Prandtl number fluid. In the liquid bridge, the convection changes from a two-dimensional steady flow to a three-dimensional oscillatory one at a critical temperature difference. Feedback control was realized by locally modifying the free surface temperature using local temperature measured at different positions. The present study aims to develop a new control scheme by taking spatio-temporal azimuthal distribution of temperature fluctuation into account. The new control scheme achieved significant attenuation of the temperature oscillation compared with the previous one in a high Marangoni number range. (c) 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：57 / 63
页数：7
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