SYMPOSIA PAPER Published: 01 January 1984

Hot-Wire Technique for Droplet Measurements


An instrument using hot-wire technology to measure droplet size distributions in the 1 to 450 µm size range is discussed. Such instrumentation has several advantages over present techniques which are dominated by a variety of laser light scattering approaches. The major advantages are: (1) the hot-wire instrument is readily portable; (2) no careful alignment is necessary; and (3) the instrument is available at a fraction of the cost of optical instruments.

The present paper discusses some details of the droplet/wire interaction, for example, effects of the wire mounting posts, “grazing” interactions, aerodynamic effects, and liquid variation. Also discussed are the means of raw data corrections to obtain a variety of mean droplet sizes, volume concentration, and volume flow rates.

Limitations will be discussed along with examples of where the instrument can best be utilized.

Author Information

Mahler, DS
KLD Associates, Inc., Huntington Station, NY
Magnus, DE
KLD Associates, Inc., Huntington Station, NY
Price: $25.00
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Developed by Committee: E29
Pages: 153–165
DOI: 10.1520/STP32623S
ISBN-EB: 978-0-8031-4913-7
ISBN-13: 978-0-8031-0227-9