Simultaneous 3D location and size measurement of bubbles and sand particles in a flow using interferometric particle imaging

L. Ouldarbi (1) , G. Pérret (2) , P. Lemaitre (3) , E. Porcheron (3) , S. Coetmellec (1) , G. Gréhan (1) , Denis Lebrun (1) , Marc Brunel (1)

1 CORIA - Complexe de recherche interprofessionnel en aérothermochimie
2 LOMC - Laboratoire Ondes et Milieux Complexes
3 IRSN - Institut de Radioprotection et de Sûreté Nucléaire

We present a system to characterize a triphasic flow in a 3D volume (air bubbles and solid irregular particles in water) using only one CCD sensor. A cylindrical interferometric out-of-focus imaging setup is used to determine simultaneously the 3D position and the size of bubbles and irregular sand particles in a flow. The 3D position of the particles is deduced from the ellipticity of their out-of-focus image. The size of bubbles is deduced from analysis of interference fringes. The characteristics of irregular sand particles are obtained from analysis of their speckle-like pattern. Experiments are confirmed by simulations.

Domaines: Optique / photonique

L. Ouldarbi, G. Pérret, P. Lemaitre, E. Porcheron, S. Coetmellec, et al.. Simultaneous 3D location and size measurement of bubbles and sand particles in a flow using interferometric particle imaging. Applied optics, 2015, 54 (25), pp.7773. ⟨10.1364/AO.54.007773⟩. ⟨hal-02112734⟩