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 …

The use of X-ray flow visualization has brought a powerful new tool to the study of
multiphase flows. Penetrating radiation can probe the spatial concentration of the different …

We report a new approach to flow field tomography that uses the Navier–Stokes and
advection–diffusion equations to regularize reconstructions. Tomography is increasingly …

Imaging through optically dense sprays is challenging due to the detection of multiple light
scattering, which blurs the recorded images and limits visibility. Structured laser illumination …

Liquid sprays play a key role in many engineering processes, including, but not limited to,
food processing, coating and painting, 3D printing, fire suppression, agricultural production …

Multiphase flows, defined as a discrete phase in a continuous fluid phase, are found in many
natural, industrial, and consumer flows, from rainfall and avalanches to petroleum …

Understanding the near-field region of a spray is integral to optimization and control efforts
because this region is where liquid break-up and spray formation occurs, setting the …

Quantitative measurements of direct injection fuel spray density and mixing are difficult to
achieve using optical diagnostics, due to the substantial scattering of light and high optical …

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 …