Background-Oriented Schlieren (BOS) is used to measure fluid density from the apparent distortion of a target dot pattern. Here, we propose a new displacement estimation methodology based on tracking individual dots on the pattern as opposed to conventional cross-correlation algorithms. As dot patterns used in...
Cavitation is ubiquitous in nature and engineering systems and governs processes from corrosion in propeller blades to drugs getting through the endothelial cells. Since the collapse of the cavitation bubble is so violent that it generates an intense shock wave and induces high shear stress...
Background-Oriented Schlieren (BOS) is a technique used to measure fluid density from the apparent distortion of a target dot pattern. Here, we model how non-linearities in the density gradient fields can blur the dot pattern image and increase the position uncertainty. To develop this model,...
Measurement of pressure in a fluid flow is essential in engineering applications as well as in investigations of flow physics. Pressure measurement devices such as wall pressure ports, static tubes, pressure-sensitive paint, etc., can be invasive, and provide only point measurements or a surface distribution....
This article presents a method for three-dimensional confocal microscopy to study the kinematics of nanometer-sized molecules and particles that are of great interest to a wide range of biological systems and cellular mechanics but have heretofore been obscured by limitations in measurement technology. Figure 1: (a)...
Most physical flows are complex and three-dimensional (3D) and all three velocity components (3C) are required to fully characterize the fluid motion. Stereo Particle Image Velocimetry (SPIV) is a non-invasive, 2D3C velocimetry measurement which offers a balance between accuracy -- 2D PIV fails to resolve...