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.
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.
the Creative Commons Attribution 4.0 License.
Model description paper
| 
07 Nov 2023
Model description paper |
| 07 Nov 2023
| 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
CORRESPONDING AUTHOR
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italy
Tomaso Esposti Ongaro
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italy
Samantha Engwell
British Geological Survey, The Lyell Centre, Research Avenue South, Edinburgh, UK
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Mattia de' Michieli Vitturi, Antonio Costa, Mauro A. Di Vito, Laura Sandri, and Domenico M. Doronzo
Solid Earth, 15, 437–458, https://doi.org/10.5194/se-15-437-2024, https://doi.org/10.5194/se-15-437-2024, 2024
Short summary
Short summary
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Short summary
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The lava eruption at Fagradalsfjall in 2021 was the most visited eruption in Iceland, with thousands of visitors per day for 6 months. To address the short- and long-term danger of lava inundating infrastructure and hiking paths, we used the lava flow model MrLavaLoba before and during the eruption. These simulations helped communicate lava hazards to stakeholders and can be used as a case study for lava hazard assessment for future eruptions in the area, which are likely to be more destructive.
Mattia de' Michieli Vitturi and Federica Pardini
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Short summary
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Here, we present PLUME-MoM-TSM, a volcanic plume model that allows us to quantify the formation of aggregates during the rise of the plume, model the phase change of water, and include the possibility to simulate the initial spreading of the tephra umbrella cloud intruding from the volcanic column into the atmosphere. The model is first applied to the 2015 Calbuco eruption (Chile) and provides an analytical relationship between the upwind spreading and some characteristic of the volcanic column.
Alessandro Tadini, Andrea Bevilacqua, Augusto Neri, Raffaello Cioni, Giovanni Biagioli, Mattia de'Michieli Vitturi, and Tomaso Esposti Ongaro
Solid Earth, 12, 119–139, https://doi.org/10.5194/se-12-119-2021, https://doi.org/10.5194/se-12-119-2021, 2021
Short summary
Short summary
In this paper we test a simplified numerical model for pyroclastic density currents or PDCs (mixtures of hot gas, lapilli and ash moving across the landscape under the effect of gravity). The aim is quantifying the differences between real and modelled deposits of some PDCs of the 79 CE eruption of Vesuvius, Italy. This step is important because in the paper it is demonstrated that this simplified model is useful for constraining input parameters for more computationally expensive models.
Cited articles
Ancey, C.: Powder snow avalanches: Approximation as non-Boussinesq clouds with a Richardson number–dependent entrainment function, J. Geophys. Res.-Earth, 109, F01005, https://doi.org/10.1029/2003JF000052, 2004. a
Arakawa, A.: Computational design for long-term numerical integration of the equations of fluid motion: Two-dimensional incompressible flow. Part I, J. Comput. Phys., 135, 103–114, 1997. a
Arakawa, A. and Lamb, V. R.: Computational design of the basic dynamical processes of the UCLA general circulation model, General Circulation Models of the Atmosphere, 17, 173–265, 1977. a
Arakawa, A. and Lamb, V. R.: A potential enstrophy and energy conserving scheme for the shallow water equations, Mon. Weather Rev., 109, 18–36, 1981. a
Bagheri, G. and Bonadonna, C.: On the drag of freely falling non-spherical particles, Powder Technol., 301, 526–544, 2016. a
Bartelt, P., Salm, L. B., and Gruberl, U.: Calculating dense-snow avalanche runout using a Voellmyfluid model with active/passive longitudinal straining, J. Glaciol., 45, 242–254, https://doi.org/10.3189/002214399793377301, 1999. a, b
Bonnecaze, R. T., Huppert, H. E., and Lister, J. R.: Particle-driven gravity currents, J. Fluid Mech., 250, 339–369, 1993. a
Bouchut, F. and Westdickenberg, M.: Gravity driven shallow water models for arbitrary topography, Commun. Math. Sci., 2, 359–389, 2004. a
Branney, M. J. and Kokelaar, P.: Pyroclastic density currents and the sedimentation of ignimbrites, Geol. Soc. Lond., 27, https://doi.org/10.1144/GSL.MEM.2003.027, 2002. a
Bürger, R. and Wendland, W. L.: Sedimentation and suspension flows: Historical perspective and some recent developments, J. Eng. Math., 41, 101–116, 2001. a
Calabrò, L., Esposti Ongaro, T., Giordano, G., and de' Michieli Vitturi, M.: Reconstructing Pyroclastic Currents' Source and Flow Parameters from Deposit Characteristics and Numerical Modelling: The Pozzolane Rosse Ignimbrite case study (Colli Albani, Italy), J. Geophys. Res.-Sol. Ea., 127, e2021JB023637, https://doi.org/10.1029/2021JB023637, 2022. a, b, c
Capra, L., Norini, G., Groppelli, G., Macías, J. L., and Arce, J. L.: Volcanic hazard zonation of the Nevado de Toluca volcano, México, J. Volcanol. Geoth. Res., 176, 469–484, 2008. a
Carey, S., Sigurdsson, H., Mandeville, C., and Bronto, S.: Pyroclastic flows and surges over water: an example from the 1883 Krakatau eruption, B. Volcanol., 57, 493–511, https://doi.org/10.1007/BF00304435, 1996. a
Christen, M., Kowalski, J., and Bartelt, P.: RAMMS: Numerical simulation of dense snow avalanches in three-dimensional terrain, Cold Reg. Sci. Technol., 63, 1–14, 2010. a
Clift, R. and Gauvin, W.: Motion of entrained particles in gas streams, Can. J. Chem. Eng., 49, 439–448, 1971. a
Costa, A. and Macedonio, G.: Numerical simulation of lava flows based on depth-averaged equations, Geophys. Res. Lett., 32, L05304, https://doi.org/10.1029/2004GL021817, 2005. a, b
Cushman-Roisin, B. and Beckers, J.-M.: Introduction to geophysical fluid dynamics: physical and numerical aspects, Academic press, ISBN 9780120887590, 2011. a
Delestre, O.: Simulation du ruissellement d'eau de pluie sur des surfaces agricoles, Ph.D. thesis, Université d'Orléans, 2010. a
Dellino, P., Dioguardi, F., Doronzo, D. M., and Mele, D.: The entrainment rate of non-Boussinesq hazardous geophysical gas-particle flows: An experimental model with application to pyroclastic density currents, Geophys. Res. Lett., 46, 12851–12861, 2019a. a
Dellino, P., Dioguardi, F., Doronzo, D. M., and Mele, D.: The rate of sedimentation from turbulent suspension: An experimental model with application to pyroclastic density currents and discussion on the grain-size dependence of flow runout, Sedimentology, 66, 129–145, 2019b. a
Dellino, P., Dioguardi, F., Doronzo, D. M., and Mele, D.: A discriminatory diagram of massive versus stratified deposits based on the sedimentation and bedload transportation rates. Experimental investigation and application to pyroclastic density currents, Sedimentology, 67, 2013–2039, 2020. a
de' Michieli Vitturi, M.: demichie/IMEX_SfloW2D_v2: IMEX_sflow2D 2.0, Zenodo [code], https://doi.org/10.5281/zenodo.7476737, 2022. a
de' Michieli Vitturi, M. and Pardini, F.: PLUME-MoM-TSM 1.0.0: a volcanic column and umbrella cloud spreading model, Geosci. Model Dev., 14, 1345–1377, https://doi.org/10.5194/gmd-14-1345-2021, 2021. a
Denlinger, R. P. and Iverson, R. M.: Flow of variably fluidized granular masses across three-dimensional terrain: 2. Numerical predictions and experimental tests, J. Geophys. Res., 106, 553, https://doi.org/10.1029/2000jb900330, 2001. a
Dioguardi, F., Mele, D., and Dellino, P.: A new one-equation model of fluid drag for irregularly shaped particles valid over a wide range of Reynolds number, J. Geophys. Res.-Sol. Ea., 123, 144–156, 2018. a
Dufek, J.: The Fluid Mechanics of Pyroclastic Density Currents, Annu. Rev. Fluid Mech., 48, 459–485, https://doi.org/10.1146/annurev-fluid-122414-034252, 2015. a
Dufek, J., Manga, M., and Staedter, M.: Littoral blasts: Pumice-water heat transfer and the conditions for steam explosions when pyroclastic flows enter the ocean, J. Geophys. Res.-Sol. Ea., 112, B11201, https://doi.org/10.1029/2006JB004910, 2007. a, b
Dufek, J., Ongaro, T. E., and Roche, O.: Pyroclastic density currents: processes and models, in: The encyclopedia of volcanoes, Elsevier, 617–629, https://doi.org/10.1016/B978-0-12-385938-9.00035-3, 2015. a
Esposti Ongaro, T., Cerminara, M., Charbonnier, S. J., Lube, G., and Valentine, G. A.: A framework for validation and benchmarking of pyroclastic current models, B. Volcanol., 82, 1–17, https://doi.org/10.1007/s00445-020-01388-2, 2020. a
Fagents, S. A. and Baloga, S. M.: Toward a model for the bulking and debulking of lahars, J. Geophys. Res.-Sol. Ea., 111, B10201, https://doi.org/10.1029/2005JB003986, 2006. a
Fernández-Nieto, E. D., Bouchut, F., Bresch, D., Diaz, M. C., and Mangeney, A.: A new Savage–Hutter type model for submarine avalanches and generated tsunami, J. Comput. Phys., 227, 7720–7754, 2008. a
Fyhn, E. H., Lervåg, K. Y., Ervik, Å., and Wilhelmsen, Ø.: A consistent reduction of the two-layer shallow-water equations to an accurate one-layer spreading model, Phys. Fluids, 31, 122103, https://doi.org/10.1063/1.5126168, 2019. a, b, c
Ganser, G. H.: A rational approach to drag prediction of spherical and nonspherical particles, Powder Technol., 77, 143–152, 1993. a
Gidaspow, D.: Multiphase flow and fluidization: continuum and kinetic theory descriptions, Academic press, ISBN 9780122824708, 1994. a
Goutal, N.: Proceedings of the 2nd workshop on dam-break wave simulation, Department Laboratoire National d'Hydraulique, Groupe Hydraulique Fluviale, 1997. a
Haider, A. and Levenspiel, O.: Drag coefficient and terminal velocity of spherical and nonspherical particles, Powder Technol., 58, 63–70, 1989. a
Houghton, D. D. and Kasahara, A.: Nonlinear shallow fluid flow over an isolated ridge, Commun. Pure Appl. Math., 21, 1–23, 1968. a
Hyman, D. M., Dietterich, H. R., and Patrick, M. R.: Toward Next-Generation Lava Flow Forecasting: Development of a Fast, Physics-Based Lava Propagation Model, J. Geophys. Res.-Sol. Ea., 127, e2022JB024998, https://doi.org/10.1029/2022JB024998, 2022. a
Iga, S.-I. and Matsuda, Y.: Shear instability in a shallow water model with implications for the Venus atmosphere, J. Atmos. Sci., 62, 2514–2527, 2005. a
Iverson, R. M. and Denlinger, R. P.: Flow of variably fluidized granular masses across three-dimensional terrain: 1. Coulomb mixture theory, J. Geophys. Res.-Sol. Ea., 106, 537–552, https://doi.org/10.1029/2000jb900329, 2001. a
Johnson, C. G., Hogg, A. J., Huppert, H. E., Sparks, R. S. J., Phillips, J. C., Slim, A. C., and Woodhouse, M. J.: Modelling intrusions through quiescent and moving ambients, J. Fluid Mech., 771, 370–406, 2015. a
Johnson, R. S.: A modern introduction to the mathematical theory of water waves, Vol. 19, Cambridge university press, ISBN 9780521591720, 1997. a
Kelfoun, K.: Suitability of simple rheological laws for the numerical simulation of dense pyroclastic flows and long-runout volcanic avalanches, J. Geophys. Res.-Sol. Ea., 116, B08209, https://doi.org/10.1029/2010JB007622, 2011. a
Kelfoun, K. and Druitt, T. H.: Numerical modeling of the emplacement of Socompa rock avalanche, Chile, J. Geophys. Res.-Sol. Earth, 110, B12202, https://doi.org/10.1029/2005JB003758, 2005. a
Kelfoun, K., Samaniego, P., Palacios, P., and Barba, D.: Testing the suitability of frictional behaviour for pyroclastic flow simulation by comparison with a well-constrained eruption at Tungurahua volcano (Ecuador), B. Volcanol., 71, 1057–1075, 2009. a
Khezri, N.: Modelling turbulent mixing and sediment process beneath tidal bores: physical and numerical investigations, Ph.D. thesis, School of Civil Engineering, The University of Queensland, 2014. a
Kurganov, A., Noelle, S., and Petrova, G.: Semidiscrete central-upwind schemes for hyperbolic conservation laws and Hamilton–Jacobi equations, SIAM J. Sci. Comput., 23, 707–740, 2001. a
Maeno, F. and Imamura, F.: Tsunami generation by a rapid entrance of pyroclastic flow into the sea during the 1883 Krakatau eruption, Indonesia, J. Geophys. Res.-Sol. Ea., 116, B09205, https://doi.org/10.1029/2011JB008253, 2011. a
Mandeville, C., Carey, S., Sigurdsson, H., and King, J.: Paleomagnetic evidence for high‐temperature emplacement of the 1883 subaqueous pyroclastic flows from Krakatau Volcano, Indonesia, J. Geophys. Res.-Sol. Ea., 99, 9487–9504, https://doi.org/10.1029/94JB00239, 1994. a
Mangeney, A., Bouchut, F., Thomas, N., Vilotte, J. P., and Bristeau, M. O.: Numerical modeling of self-channeling granular flows and of their levee-channel deposits, J. Geophys. Res., 112, F02017, https://doi.org/10.1029/2006JF000469, 2007. a
Marino, B., Thomas, L., and Linden, P.: The front condition for gravity currents, J. Fluid Mech., 536, 49–78, 2005. a
Michel-Dansac, V., Berthon, C., Clain, S., and Foucher, F.: A well-balanced scheme for the shallow-water equations with topography, Comput. Math. Appl., 72, 568–593, 2016. a
Murillo, J. and García-Navarro, P.: Energy balance numerical schemes for shallow water equations with discontinuous topography, J. Comput. Phys., 236, 119–142, 2013. a
Neri, A., Esposti Ongaro, T., Cerminara, M., and de' Michieli Vitturi, M.: Multiphase flow modeling of explosive volcanic eruptions, in: Transport phenomena in multiphase systems, Springer, 243–281, https://doi.org/10.1007/978-3-030-68578-2_10, 2022. a
Oberkampf, W. L. and Trucano, T. G.: Verification and validation in computational fluid dynamics, Prog. Aerospace Sci., 38, 209–272, 2002. a
Pareschi, L. and Russo, G.: Implicit–explicit Runge–Kutta schemes and applications to hyperbolic systems with relaxation, J. Sci. Comput., 25, 129–155, 2005. a
Parker, G., Garcia, M., Fukushima, Y., and Yu, W.: Experiments on turbidity currents over an erodible bed, J. Hydraul. Res., 25, 123–147, 1987. a
Patra, A. K., Bauer, A., Nichita, C., Pitman, E. B., Sheridan, M., Bursik, M., Rupp, B., Webber, A., Stinton, A., Namikawa, L., and Renschler, C. S.: Parallel adaptive numerical simulation of dry avalanches over natural terrain, J. Volcanol. Geoth. Res., 139, 1–21, https://doi.org/10.1016/j.jvolgeores.2004.06.014, 2005. a, b
Pitman, E. B., Nichita, C. C., Patra, A., Bauer, A., Sheridan, M., and Bursik, M.: Computing granular avalanches and landslides, Phys. Fluids, 15, 3638–3646, https://doi.org/10.1063/1.1614253, 2003. a, b
Putra, Y. S., Beaudoin, A., Rousseaux, G., Thomas, L., and Huberson, S.: 2D numerical contributions for the study of non-cohesive sediment transport beneath tidal bores, C. R. Mécanique, 347, 166–180, 2019. a
Shimizu, H. A., Koyaguchi, T., and Suzuki, Y. J.: A numerical shallow-water model for gravity currents for a wide range of density differences, Prog. Earth Planet. Sci., 4, 8, https://doi.org/10.1186/s40645-017-0120-2, 2017a. a
Shimizu, H. A., Koyaguchi, T., and Suzuki, Y. J.: A numerical shallow-water model for gravity currents for a wide range of density differences, Prog. Earth Planet. Sci., 4, 1–13, 2017b. a
Shimizu, H. A., Koyaguchi, T., and Suzuki, Y. J.: Dynamics and Deposits of Pyroclastic Density Currents in Magmatic and Phreatomagmatic Eruptions Revealed by a Two-Layer Depth-Averaged Model, Geophys. Res. Lett., 50, e2023GL104616, https://doi.org/10.1029/2023GL104616, 2023. a
Sigurdsson, H., Houghton, B., McNutt, S., Rymer, H., and Stix, J.: The encyclopedia of volcanoes, Elsevier, Hardback ISBN 9780123859389, eBook ISBN 9780123859396, 2015. a
Simpkin, T. and Fiske, R.: Krakatau 1883: The volcanic eruption and its effects, Smithsonian Institution Press, ISBN 10 0874748410, ISBN 13 9780874748413, 1983. a
Sulpizio, R., Dellino, P., Doronzo, D., and Sarocchi, D.: Pyroclastic density currents: state of the art and perspectives, J. Volcanol. Geoth. Res., 283, 36–65, 2014. a
Von Storch, H. and Woth, K.: Storm surges: perspectives and options, Sustain. Sci., 3, 33–43, 2008. a
Woods, A. W. and Wohletz, K.: Dimensions and dynamics of co-ignimbrite eruption columns, Nature, 350, 225–227, https://doi.org/10.1038/350225a0, 1991. a
Zeitlin, V.: Geophysical fluid dynamics: understanding (almost) everything with rotating shallow water models, Oxford University Press, ISBN 9780198804338, 2018. a
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.
We present version 2 of the numerical code IMEX-SfloW2D. With this version it is possible to...
