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Experiment on multimode feedback control of non-linear thermocapillary convection in a half-zone liquid bridge
KTH, School of Engineering Sciences (SCI), Mechanics, Physicochemical Fluid Mechanics.ORCID iD: 0000-0003-3336-1462
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2005 (English)In: LOW GRAVITY PHENOMENA AND CONDENSED MATTER EXPERIMENTS IN SPACE   / [ed] Narayanan, R; Chui, TCP, 2005, Vol. 36, no 1, 57-63 p.Conference paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
2005. Vol. 36, no 1, 57-63 p.
Keyword [en]
non-linear thermocapillary convection, feedback control, half-zone liquid bridge, modal structure
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-47282DOI: 10.1016/j.asr.2005.05.046ISI: 000235191400008ScopusID: 2-s2.0-27144508728OAI: diva2:454616
35th COSPAR Scientific Assembly, Paris, FRANCE, JUL 18-25, 2004
QC 20111107Available from: 2011-11-07 Created: 2011-11-07 Last updated: 2011-11-07Bibliographically approved

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Amberg, Gustav
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Physicochemical Fluid Mechanics
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