Validation of a volcano sound production using PIV and acoustics

Volcanic plumes represent significant hazards both near and far from the volcanic vent bearing considerable economic and health implications. Drawing upon research from the aero-acoustics industry, key eruption parameters for column generating eruptions have been deduced from in-field acoustic measurements (Matoza et al. 2009). However, this work assumes the recorded sound is dominated by physical phenomena inherent to the eruption column. The reported study aims to replicate volcanic flow conditions in a laboratory environment and investigate the origin of sound emitted by a nozzle. Sound sources are located using microphone arrays, while complementary PIV experiments provide details of the generated flow. Results show that the dominant source depends on nozzle geometry and does not necessarily relate to the sound propagated by the jet flow.