Shock wave interaction with an abrupt area change

Phase change and stress wave in picosecond laser–material interaction with shock wave formation

When background gas is present in pulsed laser– material interaction, a shock wave down to the nanoscale will emerge. The background gas will affect the phase change and explosion in the target. This study is focused on the void dynamics and stress wave in a model material (argon crystal) under picosecond pulsed laser irradiation. Our results show that existence of ambient gas and the shock wav...

Shock Wave Interaction with a Flame

Shock wave/fire interactions initiated by high explosives have been historically demonstrated as potentially effective ways to control oil well fires or even forest fires in situations where conventional means cannot be applied. However, the mechanisms by which a fire can be extinguished by a shock wave are not well understood. A series of experiments have been conducted involving a moving shoc...

Incident Shock Wave Interaction with an Axisymmetric Cone Body Placed in Shock Tube

Mobile Millimeter Wave Channel Acquisition, Tracking, and Abrupt Change Detection

Millimeter wave provides a promising approach for meeting the ever-growing traffic demand in next generation wireless networks. It is crucial to obtain relatively accurate channel state information so that beamforming/combining can be performed to compensate for severe path loss in this band. In contrast to lower frequencies, a typical mobile millimeter wave channel consists of a few dominant p...

Abrupt climate change: An alternative view

Hypotheses and inferences concerning the nature of abrupt climate change, exemplified by the Dansgaard–Oeschger (D–O) events, are reviewed. There is little concrete evidence that these events are more than a regional Greenland phenomenon. The partial coherence of ice core yO and CH4 is a possible exception. Claims, however, of D–O presence in most remote locations cannot be distinguished from t...