Energy Education Science and Technology Part A: Energy Science and Research
2014 Volume (issues) 32(4): 2527-2538
Multigrid solver for two-dimension
Jiabin Yan*, Yanlong Wang
Central South University, School of Geosciences and Info-Physics, Changsha 410083, China
Received: 20 Febuary 2014; accepted: 24 April 2014
In magnetotelluric (MT) forward modeling, the numerical algorithm and its computational structure, which are used to solve large liner equations, will impact the efficiency and accuracy of the modeling calculation. The performance of multigrid(MG) solver for frequent domain electromagnetic problem such as MT is investigated. The discretization of the governing equations is obtained by the finite element method (FEM). The MG acts as a preconditioner in the calculation, which can optimize the computational structure with different grid, further more improve the algorithms’ smoothing efficiency for each part of the error component. The MG provides convergence with grid spacing in one-dimension (1D) and two-dimension (2D) forward modeling calculation of magnetotelluric.
Keywords: Magnetotelluric; Forward modeling; Uneven multigrid; Computational structure