[13a-D63-1~8] 1.6 Ultrasonics

[13a-D63-1] [Young Scientist Presentation Award Speech] Accurate size measurement of airborne microdroplets using forward light scattering

〇Daichi Hayakawa¹, Yusuke Matsuura¹, Shujiro Mitani¹, Keiji Sakai¹ (1.IIS, Univ. of Tokyo)

Keywords:Light scattering, inkjet, size measurement

An inkjet device depicts a promising future with application extending to printing, encapsulation, and chemical synthesis. Microdroplets created by inkjet are peculiar in that they measure only 10 µm while flying at 10 m/s. In such a small yet fast system, accurate measurement of the physical properties of the microdroplets, including their size, proves to be difficult. Although a few methods for size measurement have been established by previous works, none has been able to fulfill the requirement for a simple, speedy, and accurate measurement. Here, we introduce an in situ size measurement method via forward light scattering. By comparing the result with a numerical analysis, we came up with a simple algorithm to estimate the radius with precision under 1%.