Abstract: A microscopic particle image velocimetry (μPIVμPIV) technique is developed based on light field microscopy and is applied to flow through a microchannel containing a backward-facing step. The only hardware difference from a conventional μμPIV setup is the placement of a microlens array at the intermediate image plane of the microscope. The method combines this [...]
Abstract: Buoyant spheres released below the free surface can rise well above the surface in a phenomenon known as pop-up. Contrary to intuition, increasing the release depth sometimes results in a lower pop-up height. We present the pop-up height of rising buoyant spheres over a range of release depths (1–12.5 diameters) and Reynolds numbers (4×104 [...]
Abstract: Obtaining pressure field data from particle image velocimetry (PIV) is an attractive technique in fluid dynamics due to its noninvasive nature. The application of this technique generally involves integrating the pressure gradient or solving the pressure Poisson equation using a velocity field measured with PIV. However, very little research has been done [...]
Abstract: Desert plants possess highly evolved water conservation and transport systems, from the root structures that maximize absorption of scarce ground water1,2,3,4,5, to the minimization of leaf surface area6 to enhance water retention. Recent attention has focused on leaf structures that are adapted to collect water and promote nucleation from humid air7,8,9. Syntrichia [...]
Abstract: We present new observations from an experimental investigation of the classical problem of the crown splash and sealing phenomena observed during the impact of spheres onto quiescent liquid pools. In the experiments, a 6 m tall vacuum chamber was used to provide the required ambient conditions from atmospheric pressure down to 1/16th of [...]
Abstract: We present observations from an experimental study of the ablation of a free liquid surface promoted by a focused laser pulse, causing a rapid discharge of liquid in the form of a very thin conical-shaped sheet. In order to capture the dynamics, we employ a state-of-the-art ultra-high-speed video camera capable of capturing [...]
Abstract: Incited by public fascination and engineering application, water-skipping of rigid stones and spheres has received considerable study. While these objects can be coaxed to ricochet, elastic spheres demonstrate superior water-skipping ability, but little is known about the effect of large material compliance on water impact physics. Here we show that upon water [...]
Citation: Mach stem formation during outdoor acoustic shock propagation is investigated using spherical oxyacetylene balloons exploded above pavement. The location of the transition point from regular to irregular reflection and the path of the triple point are experimentally resolved using microphone arrays and a high-speed camera. The transition point falls between recent analytical [...]
Abstract: There is no abstract available for this article. Citation and Link: Marston, J., Mansoor, M., Truscott, T., & Thoroddsen, S., Buckling instability of crown sealing, Physics of Fluids, 27, 091112, DOI: 10.1063/1.4931097, September 2015
Abstract: Not available. Citation and Link: Hurd, R., Fanning, T., Pan, Z., Mabey, C., Bodily, K., Hacking, K., Speirs, N., & Truscott, T., Matryoshka cavity, Physics of Fluids, 27, 091104, DOI: 10.1063/1.4930902, September 2015.