IMEX_SfloW2D v2: a depth-averaged numerical flow model for volcanic gas–particle flows over complex topographies and water

de' Michieli Vitturi, Mattia; Esposti Ongaro, Tomaso; Engwell, Samantha

doi:https://doi.org/10.5194/gmd-16-6309-2023

Articles | Volume 16, issue 21

https://doi.org/10.5194/gmd-16-6309-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-16-6309-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 21

Model description paper

|

07 Nov 2023

Model description paper |

| 07 Nov 2023

IMEX_SfloW2D v2: a depth-averaged numerical flow model for volcanic gas–particle flows over complex topographies and water

Mattia de' Michieli Vitturi, Tomaso Esposti Ongaro, and Samantha Engwell

Supplement

https://doi.org/10.5194/gmd-16-6309-2023-supplement

Model code and software

IMEX_SfloW2D_v2 M. de' Michieli Vitturi https://doi.org/10.5281/zenodo.7769849

Short summary

We present version 2 of the numerical code IMEX-SfloW2D. With this version it is possible to simulate a wide range of volcanic mass flows (pyroclastic avalanches, lahars, pyroclastic surges), and here we present its application to transient dilute pyroclastic density currents (PDCs). A simulation of the 1883 Krakatau eruption demonstrates the capability of the numerical model to face a complex natural case involving the propagation of PDCs over the sea surface and across topographic obstacles.