Ultrasonic Absorption in Liquids at High Pressure

Statistical-mechanical theory of ultrasonic absorption in molecular liquids.

We present results of the theoretical description of ultrasonic phenomena in molecular liquids. In particular, we are interested in the development of a microscopical, i.e., statistical-mechanical, framework capable of explaining the long living puzzle of excess ultrasonic absorption in liquids. Typically, an ultrasonic wave in a liquid can be generated by applying a periodically alternating ex...

An ultrasonic frequency sweep interferometer for liquids at high temperature: 1. Acoustic model

[1] A general acoustic model for a frequency sweep rod-liquid-rod interferometer applicable to high-temperature silicate liquids is presented. The wave propagations in the acoustic model are solved according to the accurate elastic wave equation and the acoustic wave equation. The solutions indicate that when a pulsed wave is sent down a buffer rod, which is partially immersed in a silicate liq...

Ultrasonic Solution For High Pressure Gas Service

An Ultrasonic Interferometer for High-Pressure Research

A new method in which ultrasonic interferometry is used to measure the pressure dependence of elastic constants and the density of solids has been applied to polycrystalline I{C1 to pressures of 36 kilobars. Simultaneous measurement of longitudinal and transverse wave velocities in a specimen of initial thickness of approximately 0.2 mm, compressed between two tungsten carbide anvils, yields th...

ULTRASONIC and HIGH - PRESSURE STRIP CLEANING TECHNOLOGY