Modeling dense pyroclastic basal flows from collapsing columns

Details Modeling dense pyroclastic basal flows from collapsing columns Modeling dense pyroclastic basal flows from collapsing columns

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3504305d&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 4, CiteID L04305

Statistics

Computation

1

Computational Geophysics: Modeling (4255), Oceanography: General: Numerical Modeling (0545, 0560), Volcanology: Eruption Mechanisms And Flow Emplacement, Volcanology: Volcanic Hazards And Risks, Volcanology: Explosive Volcanism

Scientific paper

A two layer model for the formation of dense pyroclastic basal flows from dilute, collapsing volcanic eruption columns is presented. The collapsing dilute current is described by depth averaged, isothermal, continuum conservation equations. The dense basal flow is modelled as a granular avalanche of constant density. Simulations demonstrate that pyroclastic flow formation and behavior is dependent upon slope conditions when the dilute part of the current has lost most of its mass. The dilute current runout increases with decreasing particle size and increasing initial column height. If the dilute current has transferred its mass to the dense basal flow on volcanic slopes with inclination angle greater than the friction angle of the basal flow, then the basal flow will continue to propagate until frictional forces bring it to rest. If the dilute current terminates on lower angled slopes, frictional forces dominate the basal flow preventing further front propagation.

Affiliated with

Also associated with

No associations

Rating

Modeling dense pyroclastic basal flows from collapsing columns does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Modeling dense pyroclastic basal flows from collapsing columns, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling dense pyroclastic basal flows from collapsing columns will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1321311