In this fluid dynamics video, we present an overview of the most important results recently obtained in our group using an optical profilometric technique that allows for single-shot global measurement of free-surface deformations. This system consists of a high-resolution system composed of a videoprojector and a digital camera. A fringe pattern of known characteristics is projected onto the free surface and its image is registered by the camera. The deformed fringe pattern arising from the surface deformations is later compared to the undeformed (reference) one, leading to a phase map from which the free surface can be reconstructed. Two examples are developed: (a) the study of water wave trapped modes and (b) the impact of a drop onto a thin layer of the same liquid.
@article{arxiv.1010.3311,
title = {Fast and Global Measurement of Free Surface Deformations},
author = {P. Cobelli and G. Lagubeau and M. Chekroun and A. Przadka and A. Maurel and V. Pagneux and P. Petitjeans},
journal= {arXiv preprint arXiv:1010.3311},
year = {2010}
}
Comments
Fluid Dynamics Video for the Gallery of Fluid Motion APS DFD 2010 Long Beach, California, USA