Non-equilibrium processes in ash-laden volcanic plumes: new insights from 3D multiphase flow simulations
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- 作者：Tomaso Esposti Ongaro ; tomaso.espostiongaro@ingv.it" class="auth_mail" title="E-mail the corresponding author ; Matteo Cerminara
- 关键词：Explosive eruptions ; Turbulent plume ; Multiphase flow ; Grain-size distribution ; Stokes number ; Numerical model
- 刊名：Journal of Volcanology and Geothermal Research
- 出版年：2016
- 出版时间：15 October 2016
- 年：2016
- 卷：326
- 期：Complete
- 页码：127-142
- 全文大小：2355 K
文摘
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Weak and strong plumes are simulated in 3D with a non-equilibrium gas–particle model.
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Multiphase effects have a secondary role in the analysed large-scale plume dynamics.
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Integral model assumptions and the entrainment hypothesis hold for weak plumes.
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In the strong plume case, a supersonic fountaining structure is formed.
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Atmospheric stratification hinders the achievement of self-similarity.