Author(s): Thos . O’D. Hanley; S. Ramachandra Rao
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Abstract: Acoustic pulses were detected and counted during the formation of frazil ice in a laboratory freezer. The count rate was fairly steady until frazil began to form, and then increased fourfold or more, decreasing noticeably again as frazil formation became slower. No increase in count rate was observed when the agitation of the water was too slight to produce frazil. An electronic device has been constructed which activates a switch when frazil begins to form. Field tests have revealed defects in this device which we are currently trying to overcome.
Year: 1981