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首页> 外文期刊>Journal of Volcanology and Geothermal Research >A numerical model for the dynamics of pyroclastic flows at Galeras Volcano, Colombia
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A numerical model for the dynamics of pyroclastic flows at Galeras Volcano, Colombia

机译:哥伦比亚加勒拉斯火山火山碎屑流动力学的数值模型

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This paper presents a two-dimensional model for dilute pyroclastic flow dynamics that uses the compressible Navier-Stokes equation coupled with the Diffusion-Convection equation to take into account sedimentation. The model is applied to one of the slopes of Galeras Volcano to show: (1) the temperature evolution with the time; (2) dynamic pressure change; and (3) particle concentration along the computer domain from the eruption to the impact with a topographic barrier located more than 16 km from the source. Two initial solid volumetric fractions are modeled. For both cases, some of the structures located more distant than 10 km could survive, but in all cases the flow remains deadly. This paper shows that a dynamical model of pyroclastic flows can be implemented using personal computers.
机译:本文提出了一个二维热解碎屑流动力学模型,该模型使用可压缩的Navier-Stokes方程和Diffusion-Convection方程来考虑沉降。将该模型应用于加莱拉斯火山的一个坡度,以显示:(1)温度随时间的变化; (2)动态压力变化; (3)从喷发到撞击的整个计算机域中的粒子浓度,以及距源头超过16 km的地形障碍。对两个初始固体体积分数建模。对于这两种情况,一些距离超过10 km的建筑物都可以幸存,但在所有情况下流量仍然是致命的。本文表明,可以使用个人计算机来实现火山碎屑流的动力学模型。

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