Article (Scientific journals)
Thermocapillary convective flows generated by laser points or patterns: Comparison for the noncontact micromanipulation of particles at the interface
Mallea, R. T.; Piron, Dimitri; Bolopion, A. et al.
2018In IEEE Robotics and Automation Letters, 3 (4), p. 3255-3262
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Keywords :
Automation at micro-nano scales; Capillary flow; Fiber lasers; Heat convection; Laser beams; Motion control; Visual servoing; Closed-loop control; Heating system; Micro manipulation; Micro-nano scale; Particle displacement; Particle velocities; Steady state; Surface tension stress; Laser theory
Abstract :
[en] This letter compares the controlled manipulation of micrometer size particles using thermocapillary convective flows generated by laser points or patterns. Such flows are generated when a surface tension stress is generated at the fluid/gas interface due to a thermal gradient. Laser heating allows to generate fast, localized flows that are used to displace a particle towards a desired position. However, these flows are repulsive and so the system is unstable. Although using the simple laser spot with a closed-loop control enables to control the particle displacement, the control of the particle movement direction is somehow difficult and the particle position stabilization remains challenging. In this letter, it is proposed to use laser patterns to overcome these limitations. Experimental tests are performed using a 500-μm-diameter steel spherical particle that is displaced towards a target position. The preliminary experimental results show that it is possible to overcome the above mentioned limitations while still obtaining maximal particle velocities ranging from 4 to 9 mm/s during the displacement phase. © 2016 IEEE.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Mallea, R. T.;  TIPs Department CP 165/67, Ecole Polytechnique de Bruxelles, Universite Libre de Bruxelles, Bruxelles, 1050, Belgium, FEMTO-ST Institute, AS2M Department, Université de Franche-Comté/CNRS/ENSMM, Besançon, F-25000, France
Piron, Dimitri  ;  Université Libre de Bruxelles - ULB > Ecole Polytechnique de Bruxelles > TIPs
Bolopion, A.;  FEMTO-ST Institute, AS2M Department, Université de Franche-Comté/CNRS/ENSMM, Besançon, F-25000, France
Lambert, Pierre;  Université Libre de Bruxelles - ULB > Ecole Polytechnique de Bruxelles > TIPs
Gauthier, M.;  FEMTO-ST Institute, AS2M Department, Université de Franche-Comté/CNRS/ENSMM, Besançon, F-25000, France
Language :
English
Title :
Thermocapillary convective flows generated by laser points or patterns: Comparison for the noncontact micromanipulation of particles at the interface
Publication date :
2018
Journal title :
IEEE Robotics and Automation Letters
eISSN :
2377-3766
Publisher :
Institute of Electrical and Electronics Engineers Inc.
Volume :
3
Issue :
4
Pages :
3255-3262
Peer reviewed :
Peer Reviewed verified by ORBi
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