Fluid flow vorticity measurement using laser beams with orbital angular momentum
Optics
2016-06-29 v1
Abstract
We report on the direct measurements of fluid flow vorticity using a spatially shaped beam with a superposition of Laguerre-Gaussian modes that reports on the rotational Doppler shift from microparticles intersecting the beam focus. Experiments are carried out on fluid flows with well-characterized vorticity and the experimental results are found to be in excellent agreement with the expected values even for 200 ms integration times. This method allows for localized real-time determination of vorticity in a fluid flow.
Cite
@article{arxiv.1603.03816,
title = {Fluid flow vorticity measurement using laser beams with orbital angular momentum},
author = {A. Ryabtsev and S. Pouya and A. Safaripour and M. Koochesfahani and M. Dantus},
journal= {arXiv preprint arXiv:1603.03816},
year = {2016}
}
Comments
8 pages 4 figures