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SUMMARY:Listen to the Volcano - Joern Sesterhenn\, TU Berlin
DTSTART:20140123T113000Z
DTEND:20140123T123000Z
UID:TALK49874@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION: Volcanic hazards are a permanent risk\, even in central Europ
 e.\nDirectly\, as we learned a few years ago in the Eyjafjallajökull\neru
 ption\, but also in the impact of the ash clouds on the atmosphere and\nou
 r climate system.\n\nIn both cases it is crucial to estimate the amount of
  ash particles\nejected by an eruption. Key parameters are of course vent 
 diameter\, flow\nvelocity and particle loading of the flow. Unfortunately 
 measuring these\nseemingly simple parameters isn't that easy during an eru
 ption for\nobvious reasons. One simply can not go close and measurement de
 vices\nbrought to the vent for example by drones are quickly destroyed.\nF
 ortunately sound comes to us. Therefore volcano acoustics gained much\natt
 ention in the last years since the well documented recordings of the\nMnt.
  St. Helens eruption. The goal is to relate the measured acoustics\nof the
  usually supersonic particle laden jet to it's primary features.\nIn this 
 talk I'll show results from DNS of starting particle laden jets\nand compa
 re its structure to what can be observed on Stromboli or in lab\nexperimen
 ts.\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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