地质学报2025，Vol.99Issue(4)：1442-1453,12.DOI:10.19762/j.cnki.dizhixuebao.2023455
俯冲动力学数值模拟中的网格选择
Computational grid selection in numerical modeling of subduction dynamics
摘要
Abstract
Various numerical models based on mathematical physics equations in geosciences,including numerical modeling of subduction dynamics,necessarily involve computational grids consisting of discrete nodes,which control the accuracy of numerical calculations and thus the credibility of numerical models in solving practical geoscientific problems.The numerical modeling of subduction dynamics has made great progress in recent years,however,the numerical accuracy due to the arbitrary use of computational grids is still unclear.In this paper,we construct numerical models based on three sets of computational grids with different resolutions for a classical scientific problem,and evaluate the possible impact of low-resolution grids in practical research.It is argued that the computational grid with a resolution of 2 km× 2 km for the encrypted zone,which has been more commonly used in the last decade,is likely to obtain computational results containing significant numerical errors,which in turn affects the application of numerical modeling in subduction dynamics.Therefore,it may be necessary to revisit models with low resolution grids and their corresponding geologic conclusions in recent years.As numerical models of subduction dynamics become more and more highly nonlinear,the choice of computational grids with the highest possible resolution may be inevitable.For the case of using low-resolution grids for highly nonlinear problems,definitive evidence of grid reliability is needed.We propose a new set of grid pattern suitable for subduction dynamics:locally encrypted structured quadrilateral grids containing hanging nodes.This grid may accomplish high-precision numerical calculations with a small total number of grids and is relatively simple to implement.关键词
计算网格/数值误差/数值模拟/俯冲动力学Key words
computational grid/numerical errors/numerical modeling/subduction dynamics引用本文复制引用
杨少华,潘家伟,李海兵..俯冲动力学数值模拟中的网格选择[J].地质学报,2025,99(4):1442-1453,12.基金项目
本文为中国地质调查局地质调查项目(编号DD20221630)、中国地质科学院地质研究所基本科研业务费项目(编号J2316)、国家自然科学基金项目(编号42374121)和科技部项目(编号2019QZKK0901,2021FY100101)联合资助的成果. （编号DD20221630）
