Oblique mid ocean ridge subduction modelling with the parallel fast multipole boundary element method
Oblique mid ocean ridge subduction modelling with the parallel fast multipole boundary element method
复制标题
并行快速多极边界元法斜洋中脊俯冲建模
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
R. Müller
中科院分区：
文献类型：
--
作者：
L. Quevedo;B. Hansra;G. Morra;N. Butterworth;R. Müller
地球动力学模型描述了跨越不同长度尺度的流变复杂结构的热-力学演化，但许多最相关的动力学特征可以在低雷诺数等粘性和等强度结构的多相蠕变流方面进行研究。我们使用BEM-Earth代码在这个近似中研究固体地球系统内岩石圈和地幔的相互作用。BEM-Earth仅考虑流体界面边界积分元的动力学特性，采用哈希八叉树加速的并行多极求解器，克服了传统FD/FEM求解该问题的局限性。作为一个应用实例，我们在全球三维球形背景下自一致地模拟了控制斜洋中脊俯冲的过程，并找到了一个临界角，表征了与构造板块颈缩相关的伸展应变和与地球曲率效应相关的压缩应变之间的过渡。
Geodynamic models describe the thermo-mechanical evolution of rheologically intricate structures spanning different length scales, yet many of their most relevant dynamic features can be studied in terms of low Reynolds number multiphase creep flow of isoviscous and isopycnic structures. We use the BEM-Earth code to study the interaction of the lithosphere and mantle within the solid earth system in this approximation. BEM-Earth overcomes the limitations of traditional FD/FEM for this problem by considering only the dynamics of Boundary Integral Elements at fluid interfaces, and employing a parallel multipole solver accelerated with a hashed octtree. As an application example, we self-consistently model the processes controlling the subduction of an oblique mid-ocean ridge in a global 3D spherical setting in a variety of cases, and find a critical angle characterising the transition between an extensional strain regime related to tectonic plate necking and a compressive regime related to Earth curvature effects.