Digital Holography compared to Phase Doppler Anemometry: study of an experimental droplet flow

10 pagesInternational audienceHolography is a well-known technique to measure 3D location, velocity, and sizing in a large volume. However it remains not much used in industry because of its experimental complexity. Digital holography has developed because of its ease of use, but the low resolution of the sensors requires it to be partly compensated by image processing techniques. Our new approach for the processing of in-line holograms, based on an inverse problem approach, leads to a significant improvement in axial resolution. We compare the velocity and the size measurements of particles by Digital Holography to the measurements obtained with a standard technique – the Phase Doppler Anemometry. The experimental test consists of the study of a simple low: a monodisperse water droplet flow in air