Depth from defocus technique applied to unsteady shock-drop secondary atomization

Abstract

The two-sensor depth from defocus technique for the measurement of drop sizes in a spray is further developed to achieve higher spatial and temporal resolution, to improve estimates of spatial size distribution and number concentration, and to provide additional guidelines for the calibration and design of the optical system for a specific application. The technique and these improvements are demonstrated using the case of secondary atomization when a shock wave interacts with a single drop. This is an application in which both high spatially and temporally resolved number density and size distributions of secondary droplets generated in the wake of the original drop are necessary.

Experimental research and mathematical modeling of isothermal separation of polydisperse emulsion system using quasi-monodisperse approach

“…Information about the location of droplets in a three-dimensional volume also makes it possible to recognize the uneven distribution of droplets in space. In (Sharma et al 2023), the ability of the DFD method to provide the high spatial and temporal resolution necessary to determine the size of such a dense sputtering phenomenon was effectively demonstrated.…”