Open AccessInvestigation on utilizing laser speckle velocimetry to measure the velocities of nanoparticles in nanofluids
Author(s) -
Ming Qian,
Jun Li,
Ming-Sheng Yan,
Zhonghua Shen,
Jian Lü,
Xiaowu Ni,
Qiang Li,
Yi Xuan
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.007559
Subject(s) - speckle pattern , nanofluid , optics , velocimetry , measure (data warehouse) , laser , materials science , scattering , light scattering , speckle imaging , nanoparticle , physics , nanotechnology , computer science , database
Laser speckle velocimetry (LSV) is presented to measure the velocities of nanoparticles in nanofluids and its feasibility is verified in this paper. An optical scattering model of a single nanoparticle is developed and numerical computations are done to simulate the formation of the speckles by the addition of the complex amplitudes of the scattering lights from multiple nanoparticles. Then relative experiments are done to form speckles when nanofluids are illuminated by a laser beam. The results of the experiments are in agreement with the numerical results, which verify the feasibility of utilizing LSV to measure the velocities of nanoparticles in nanofluids.