Measurement of two-phase particle flow based on the characteristics of particle-system scattering

Precise measurement of the mass of moving particles (MPM) is fundamental to the research on particle flows. In non-intrusive optical measurements, traditional discrete methods obtain the MPM by determining the connected domains on experimental pictures, leading to inevitable errors. In this study, the constitutive relationship between the MPM and the foreground grey scale value of the experimental picture is investigated on the basis of the working principle of digital cameras and the scattering theory of particle systems. This relationship is confirmed to be effective in wind-blown sand particle flow experiments using high-speed photography. (paper)