Concept of an acoustic method for particle tracking in opaque liquids

Acoustic techniques for the tracking of a tracer particle in a liquid have been detailed for a specific problem. The liquid is a molten metal in a crucible in a precision furnace; the tracer particle could be a bubble. The acoustic hardware is exterior to the furnace and is coupled to the sample via a small number of liquid-filled waveguides...

Fluid physics instrumentation study: final report: part I: system aspects

A somewhat abstract discussion of measurement processes is used to construct a table wherein various techniques for fluid physics diagnosis are collected. The usefulness of each technique for certain types of measurement problems in microgravity fluid physics is assessed. Detailed discussions of applicable techniques are collected in Appendices....