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Updated: Jun 26, 2026

Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids
Published on: March 5, 2014
Measurement of shock wave unsteadiness using a high-speed schlieren system and digital image processing
D Estruch1, N J Lawson, D G MacManus
1Department of Aerospace Sciences, Cranfield University, Cranfield, Bedfordshire MK43 0AL, United Kingdom.
Abstract:
A new method to measure shock wave unsteadiness is presented. Time-resolved visualizations of the flow field under investigation are obtained using a high-speed schlieren optical system and the motion of the shock wave is determined by means of digital image processing. Information on the shock's unsteadiness is subsequently derived with Fourier analysis. A sample study on shock unsteadiness in a shock-wave/turbulent boundary-layer interaction with separation is included. The method presented enables a measure of shock unsteadiness at locations in the imaged flow field not accessible by intrusive methods.

