Experiment on multimode feedback control of non-linear thermocapillary convection in a half-zone liquid bridge
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)
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.
, ADVANCES IN SPACE RESEARCH, ISSN 0273-1177 ; 36:1
non-linear thermocapillary convection, feedback control, half-zone liquid bridge, modal structure
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-47282DOI: 10.1016/j.asr.2005.05.046ISI: 000235191400008ScopusID: 2-s2.0-27144508728OAI: oai:DiVA.org:kth-47282DiVA: diva2:454616
35th COSPAR Scientific Assembly, Paris, FRANCE, JUL 18-25, 2004
QC 201111072011-11-072011-11-072011-11-07Bibliographically approved