Optical imaging techniques are ubiquitous for the resolution of non-uniformities in gas flows.
Planar imaging techniques such as laser-induced fluorescence are well established and …

Spatial frequency domain imaging (SFDI) has witnessed very rapid growth over the last
decade, owing to its unique capabilities for imaging optical properties and chromophores …

Sprays are among the most intellectually challenging and practically important topics in fluid
mechanics. This paper reviews needs, milestones, challenges, and a broad array of …

Since the year 2000, a number of very different techniques to image spray formation in
optically dense regions of atomizing sprays have appeared in the literature, been further …

Flash boiling and plume interaction are common phenomena occurring in gasoline direct
injection (GDI) spray at throttling and low load engine conditions. Combined with optical …

We report, the use of laser-plasma-driven x rays to reveal the three-dimensional (3D)
structure of a highly atomizing water spray. Soft x rays approximately 5 keV are generated by …

This article presents an overview of the current understanding of the structure of turbulent
sprays flames, both dilute and dense. Dilute sprays are addressed first with respect to recent …

In-situ quantification of particle concentration during the combustion of solid fuel powders is
of importance for analyzing their combustion behaviors. Digital holography (DH) is applied …

High-speed, two-dimensional synchrotron x-ray radiography and phase-contrast imaging
are demonstrated in propulsion sprays. Measurements are performed at the 7-BM beamline …

Four-dimensional (x, y, z, t) x-ray computed tomography was demonstrated in an optically
complex spray using an imaging system consisting of three x-ray sources and three high …