Light Scattering from Deformed Droplets and Droplets with Inclusions: Volume 1 - Experimental Results

摘要

This is the first of two volumes dealing with experimental and theoretical results from the scattering of light by deformed liquid droplets and droplets with inclusions. Characterizing droplet deformation could lead to improved measurement of droplet size by commercial aerodynamic particle sizing instruments. Characterizing droplets with inclusions can be important in some industrial, occupational, and military monitoring scenarios. The nozzle assembly from a TSI aerodynamic particle sizer was used to provide the accelerating flow conditions in which experimental data were recorded. A helium-neon (HeNe) laser was employed to generate the light-scattering data, and an externally triggered, pulsed copper vapor laser provided illumination for a droplet imaging system, arranged orthogonal to the HeNe scattering axis. The observed droplet deformation correlates well over a limited acceleration range, with theoretical predictions derived from analytical solution of the Navier-Stokes equation.