An algorithm for measuring the hydraulic jump height of an airfoil in a water table

摘要

Incorporating visualization in to research and education of fluid flows necessitates the use of either a wind tunnel or a water table. Water tables can be utilized for performing analogous dispersion wave experiments, in which wave height is a critical measurement. This paper describes an initial, automated water height measurement technique using photo analysis and prismatic light bending. Three algorithms for analyzing overhead images of the water jump are described. The algorithms include the fringe line detection and prism analogy, and a Discrete Fourier Transform and Convolution Method. (C) 2019 Elsevier Ltd. All rights reserved.