Subduction Zone History and Dynamics from Viscous Fluid Calculations with Non-Newtonian Rheology and Phase Transformation

9903002KingPi建议在一系列二维计算中系统地研究非牛顿流体中的热对流和相变，这些流体具有非牛顿温度和深度相关的流变性，旨在研究适合地球地幔的瑞利数俯冲。这项研究的目的是找出初始条件、边界条件、状态方程、主要相变的性质和观测数据(例如，板片热结构、大地水准面异常、地形异常、板块速度和表面速度的平坦度)之间的关系。最终的结果将是一系列二维和三维相图，这些相图将流体动力输入参数中的一个或两个的变化与特定俯冲带的可观测特征联系起来。

9903002KingThe PI proposes to conduct a systematic investigation of thermal convection in a compressible fluid with non-Newtonian temperature and depth-dependent rheology and phase transformations in a series of 2-D calculations designed to study subduction at Rayleigh numbers appropriate for Earth's mantle. The goal of this research is to map out the relationship between the initial conditions, boundary conditions, equation of state, properties of the major phase transformations, and rheology laws on the observables (e.g., slab thermal structure, geoid anomaly, topographic anomaly, plate velocity, and plateness' of the surface velocities). The final result will be a seires of 2-D and 3-D phase diagrams relating the variation in one or two of the fluid dynamical input parameters with observables features of specific subduction zones.