Electromagnetic wave surface velocimeters ESVs measure the Doppler shift in electromagnetic waves reflected from the water surface. They provide nonintrusive water surface velocity measurements from bridges and river banks. Comparisons with laboratory and field tests show very good agreement over a wide range of elevation and planview angles. Laboratory testing shows comparable results between ...

The existing particle image velocimetry (PIV) do not consider the curvature effect of non-straight trajectory, because it seems to be impossible obtain information from a pair images. As result, computed vector underestimates real velocity due straight-line approximation, that further causes systematic error for PIV instrument. In this work, curved trajectory between two recordings is firstly e...

Long-lasting emission from femtosecond excitation of nitrogen-based flows shows promise as a useful mechanism for molecular tagging velocimetry instrument. The technique, known laser electronic (FLEET), was invented at Princeton decade ago and has quickly been adopted used in variety high-speed ground test flow facilities. short temporal scales offered by amplifiers permit nonresonant multiphot...

Autocorrelation-Based Estimate of Particle Image Density in Particle Image Velocimetry