A dot tracking algorithm to measure free surface deformations

Conference paper (2018)

Authors

F.T. Charruault Fluid Mechanics - Mechanical, Maritime and Materials Engineering

A.J. Greidanus Fluid Mechanics - Mechanical, Maritime and Materials Engineering

W.P. Breugem Multi Phase Systems - Mechanical, Maritime and Materials Engineering

J. Westerweel Fluid Mechanics - Mechanical, Maritime and Materials Engineering

Research Group

Fluid Mechanics (Mechanical, Maritime and Materials Engineering) (TU Delft)

DOI: https://doi.org/10.3929/ethz-b-000279140

DIC Coating PTV Air-water interface Turbulent flow Background oriented schlieren Free surface synthetic schlieren DTA Air cavity

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Published Date

2018

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Fluid Mechanics

Abstract

The present study introduces an experimental technique based on a Free Surface-Synthetic Schlieren (FS-SS) method in order to characterize free surfaces subjected to strong deformations. Current synthetic Schlieren methods are based on local image correlation and thus limited to rather weak image deformations, implying that they can only resolve rather large surface wavelengths and limited wave amplitude. The present method is a substantial improvement that allows to measure much stronger image deformations, providing access to shorter surface wavelengths and larger amplitudes (i.e. larger surface curvatures).

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