Publication Date:
2017-04-04
Description:
Laboratory experiments have shown that the finer the grain size of granular flows of angular
rock fragments (all the other features the same), the more mobile their centre of mass. This is
due to the fact that the finer the grain size, the larger the number of particles in the flow so that
their agitation due to the interaction with the subsurface asperities has a smaller penetration
within the flow. The smaller the agitation of the particles per unit of flow mass, the smaller the
energy dissipated per unit of travel distance. Also, the larger the flow volume, the smaller the
mobility of its centre of mass. This is due to the fact that a deposit accretes backward during its
deposition on a slope change. However, the frontal end of a larger-volume deposit is more
distal than that of a smaller-volume deposit because the larger the volume, the larger its
longitudinal spreading.
Description:
Published
Description:
1621-1624
Description:
3V. Dinamiche e scenari eruttivi
Description:
restricted
Keywords:
Pyroclastic Flows
;
Mobility
;
04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
book chapter
