Application of particle method to forward modeling of marine controlled-source electromagnetic survey
Application of particle method to forward modeling of marine controlled-source electromagnetic survey
复制标题
DOI：
10.3997/2352-8265.20140166
复制
发表时间：
2014-04
期刊：
影响因子：
--
通讯作者：
N. Imamura;T. Goto;J. Takekawa;H. Mikada
中科院分区：
文献类型：
--
作者：
N. Imamura;T. Goto;J. Takekawa;H. Mikada
提出了一种基于粒子法的可控源电磁场正演模拟方法。作为粒子方法，我们使用移动粒子半隐式（MPS）方法。MPS法中颗粒分布的选择具有较大的任意性。由于数值精度和计算负荷高度依赖于粒子的数量和分布，粒子分布的选择是很重要的。我们选择非交错和交错的粒子分布，比较数值精度和计算负荷。结果表明，在空间间距相等的情况下，两种粒子分布的数值精度几乎相同。由于交错颗粒分布中所需的颗粒数量变为非交错颗粒分布中所需的颗粒数量的一半，因此我们得出结论，交错颗粒布置比非交错颗粒布置在数值上更有效。
We developed a controlled-source electromagnetic (CSEM) forward modeling scheme based on a particle method to simulate electromagnetic fields. As a particle method, we used the moving particle semi-implicit (MPS) method. In MPS method, the choice of particle distribution has large arbitrariness. Since numerical accuracy and computational load depend highly on the number of particles and their distribution, the choice of particle distribution is important. We select non-staggered and staggered particle distributions to compare the numerical accuracy and computational load. As a result, the numerical accuracy of two kinds of particle distributions is almost the same as each other if the spatial interval is equivalent. Because the number of particles required in the staggered particle distribution becomes half that in the non-staggered particle distribution, we conclude that staggered particle placement is numerically effective than the non-staggered.