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February 25-26, 2019 | Paris, France
Materials Science and Engineering
2 nd International Conference on
Journal of Materials Science and Nanotechnology | Volume 3
The characterization of water droplets or ice particles
in the atmosphere is important for aircraft safety and
meteorology. Interferometric out-of-focus imaging offers
an interesting solution: The technique allows indeed size
measurements of both kinds of particles, leading to a possible
estimation of Ice Water Content and Liquid Water Content. In
this technique, liquid droplets generate two-wave interference
patterns whose frequency gives the droplet’s diameter. Ice
crystal characterization is based on the analysis of speckle
patterns. Prototypes based on interferometric particle imaging
have thus been developed and tested in flight. In this lecture,
the instrumentation developed to perform accurate size
measurements will be described. The presentation will address:
(i) the principle of the analysis of speckle patterns for ice crystal
sizing, (ii) the development of laboratory instrumentation
around a freezing chamber, (iv) their combination to ice
crystal growth simulation using phase field modelling, (v) the
generation of programmable pseudo-particles using a Digital
Micromirrors Device and (vi) design considerations for the
realization of an airborne instrument.
Speaker Biography
Marc BRUNEL has completed his PhD in 1996 from Paris-Sud University, France. He is a
Professor inRouenNormandyUniversity.Hehaspublishedover120articles in International
periodic journals. His domains of research in laboratory CORIA are interferometric
imaging of particles, digital holography, laser / particle interaction, and laser metrology.
e:
Marc BRUNEL
Rouen Normandy University, France
Interferometric imaging for the characterization of ice particles and droplets in the atmosphere