Turbulent particle-gas feedback exacerbates the hazard impacts of pyroclastic density currents

Simple item page
dc.citation.issue1
dc.citation.volume5
dc.contributor.authorUhle DH
dc.contributor.authorLube G
dc.contributor.authorBreard ECP
dc.contributor.authorMeiburg E
dc.contributor.authorDufek J
dc.contributor.authorArdo J
dc.contributor.authorJones JR
dc.contributor.authorBrosch E
dc.contributor.authorCorna LRP
dc.contributor.authorJenkins SF
dc.contributor.editorDoronzo D
dc.contributor.editorAslin J
dc.date.accessioned2024-11-06T00:49:47Z
dc.date.available2024-11-06T00:49:47Z
dc.date.issued2024-05-09
dc.description.abstractCausing one-third of all volcanic fatalities, pyroclastic density currents create destruction far beyond our current scientific explanation. Opportunities to interrogate the mechanisms behind this hazard have long been desired, but pyroclastic density currents persistently defy internal observation. Here we show, through direct measurements of destruction-causing dynamic pressure in large-scale experiments, that pressure maxima exceed theoretical values used in hazard assessments by more than one order of magnitude. These distinct pressure excursions occur through the clustering of high-momentum particles at the peripheries of coherent turbulence structures. Particle loading modifies these eddies and generates repeated high-pressure loading impacts at the frequency of the turbulence structures. Collisions of particle clusters against stationary objects generate even higher dynamic pressures that account for up to 75% of the local flow energy. To prevent severe underestimation of damage intensities, these multiphase feedback processes must be considered in hazard models that aim to mitigate volcanic risk globally.
dc.description.confidentialfalse
dc.identifier.citationUhle DH, Lube G, Breard ECP, Meiburg E, Dufek J, Ardo J, Jones JR, Brosch E, Corna LRP, Jenkins SF. (2024). Turbulent particle-gas feedback exacerbates the hazard impacts of pyroclastic density currents. Communications Earth and Environment. 5. 1.
dc.identifier.doi10.1038/s43247-024-01305-x
dc.identifier.eissn2662-4435
dc.identifier.elements-typejournal-article
dc.identifier.number245
dc.identifier.piis43247-024-01305-x
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71923
dc.languageEnglish
dc.publisherSpringer Nature Limited
dc.publisher.urihttps://www.nature.com/articles/s43247-024-01305-x
dc.relation.isPartOfCommunications Earth and Environment
dc.rights(c) 2024 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleTurbulent particle-gas feedback exacerbates the hazard impacts of pyroclastic density currents
dc.typeJournal article
pubs.elements-id488939
pubs.organisational-groupOther
Files
Original bundle
Now showing 1 - 5 of 5
Thumbnail Image
Name:
Published version.pdf
Size:
5.82 MB
Format:
Adobe Portable Document Format
Description:
488939 PDF.pdf
Download
Thumbnail Image
Name:
Evidence 3.pdf
Size:
3.71 MB
Format:
Adobe Portable Document Format
Description:
43247_2024_1305_MOESM1_ESM.pdf
Download
Thumbnail Image
Name:
Evidence 1.pdf
Size:
1.69 MB
Format:
Adobe Portable Document Format
Description:
43247_2024_1305_MOESM2_ESM.pdf
Download
Thumbnail Image
Name:
Evidence 2.pdf
Size:
328.09 KB
Format:
Adobe Portable Document Format
Description:
43247_2024_1305_MOESM3_ESM.pdf
Download
Thumbnail Image
Name:
Evidence 4.mp4
Size:
27.02 MB
Format:
Video MP4
Description:
43247_2024_1305_MOESM4_ESM.mp4
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
9.22 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles