Abstract

The interaction between pyroclastic density currents and buildings is investigated by means of numerical simulation and large-scale experiments. Numerical simulation is performed with the Euler-Lagrange approach using a two-way coupling between gas and particles of three sizes. The collapse of an eruptive column consisting of a mixture of gas and pyroclasts is produced experimentally, and the impact of the resulting shear current with mock-ups representing buildings is monitored. A combination of results from simulations and experiments shows that, upon impact with a building, the multiphase current develops strong turbulence intensity, which significantly affects particle dispersion. The flow recirculation around the building induces forced deposition at the front and wake in the back wall, with flow reattachment farther away. These changes produce a variation in the dynamic pressure, which is the most important parameter for assessing the impact of pyroclastic density currents moving over inhabited areas.

Autore Pugliese

• Dellino Pierfrancesco

Tutti gli autori

• DELLINO P.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2011

ISSN

0012-821X

ISBN

Non Disponibile

Numero di citazioni Wos

16

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

16

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile