Nondimensional analysis of particle behavior during cross-type optical particle separation

Sang Bok Kim, Hyung Jin Sung, Sang Soo Kim
2009 Applied Optics  
A nondimensional analysis of particle behavior during cross-type optical particle separation was performed. A new dimensionless number, S, was defined as the ratio of the optical force to the viscous drag force, and the effects of varying S on particle motion were examined. For large S, the particles undergo acceleration, deceleration, and release as they pass through the laser beam. The retention distance is much longer for large S than for small S. In addition, the effects on particle
more » ... on particle behavior of varying the wavelength of the laser beam, the particle size, and the index of refraction of the particles were investigated. Furthermore, an analytical expression of the retention distance for large S was validated.
doi:10.1364/ao.48.004291 pmid:19649030 fatcat:ck5rr3mfqvafbh4enb5xe2zgui