Drag of a laser trapped fine particle in a microregion

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/214861

Title: Drag of a laser trapped fine particle in a microregion
Author(s): Miwa, Masafumi; Juodkazis, Saulius; Misawa, Hiroaki
Abstract: To observe hydrodynamics in microregions, we applied laser scanning manipulation to measure the drag acting on a fine glass bead moving in mineral oil sandwiched between two glass plates (the thickness of the oil layer was a 33 and 64 mu m). We measured the maximum velocity, V-M, of a laser trapped bead at which the bead was released. This allowed us to quantitatively determine the drag, the drag coefficient, C-D, and the Reynolds number, R, of the particle in the microregion of a viscous fluid. As a result, the minimum CDR was obtained midway between the two glass plates, and the CDR increased closer to the walls. Also, the distribution of CDR was in good agreement with the values calculated using the equation for wall effect in macroregions (over 0.1 mm).
Publication type: Journal article
Source: Japanese Journal of Applied Physics: Part 1: Regular Papers, Short Notes and Review Papers, Vol. 39, no. 4A (Apr 2000), pp. 1930-1933
Publication year: 2000
FOR Code(s): 01 Mathematical Sciences; 02 Physical Sciences
Keyword(s): Hydrodynamics; Laser scanning manipulation; Laser trapping; Micromachining; Radiation force; Wall effect
Publisher: Japan Society of Applied Physics
ISSN: 0021-4922
Publisher URL: http://dx.doi.org/10.1143/JJAP.39.1930
Peer reviewed