Cavitation bubble dynamics close to a rigid surface gives rise to a rapid and transient fluid flow. A single bubble is created with a laser pulse at different stand-off distances from the rigid surface, where the stand-off distance gamma is defined by gamma = h/R(max), with h being the initial distance and R(max) being the maximum bubble radius. When the surface is covered with adherent cells, ...

We measure the diffuse reflection spectrum of solid samples such as explosives (TNT, RDX, PETN), fertilizers (ammonium nitrate, urea), and paints (automotive and military grade) at a stand-off distance of 5 m using a mid-infrared supercontinuum light source with 3.9 W average output power. The output spectrum extends from 750-4300 nm, and it is generated by nonlinear spectral broadening in a 9 ...

This paper demonstrates membrane poration of a single suspension cell due to a fast liquid microjet. The jet is formed during the collapse of a laser induced bubble created at a variable stand-off distance from the target cell. The cell is trapped by a converging structure within a microfluidic chip. The asymmetrical growth and collapse of the cavitation bubble next to the cell lead to the micr...

Deburring of cross-drilled holes by secondary erosion of an abrasive jet was carried out and the parameters were identified. The detailed studies carried out on the parameters indicate that the parameter stand-off distance, burr root-to-stopper distance, abrasive grit size and mixing ratio significantly affect the deburring process. A burr model for 90° cross-drilled holes is also presented in ...

Non-line-of-sight (NLoS) maritime mobile radio channel in 5 GHz band is experimentally investigated in this paper through wideband channel soundings. During the measurements, the transmitter was installed onboard a speed boat, while the receiver was placed on the roof top of a building on shore. Different types of cargo ships anchored off the east coast of Singapore were examined as obstruction...