WANG Wei, LI Jingfu, LIU Jie. The mesh analysis in solving 3D geoelectric FE equation with preconditioned conjugate gradient method[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2018,57(3):1-6.
WANG Wei, LI Jingfu, LIU Jie. The mesh analysis in solving 3D geoelectric FE equation with preconditioned conjugate gradient method[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2018,57(3):1-6.DOI:
Mesh division scheme affects the efficiency of 3D geoelectric finite element (FE) modelling when using pre-conditioned conjugate gradient method. The tetrahedral mesh
which is derived from regular hexahedral mesh
is recommended after mesh analysis. Results from model computations reveal that the incomplete Cholesky conjugate gradient method (ICCG) and successive over-relaxation conjugate gradient method (SORCG) could succeed when employing uniform meshes. However
the non-uniform hexahedral meshes might lead to unsuccessful pre-condition matrix and ICCG might fail. In contrast
the presented tetrahedral meshes overcome this drawback and make ICCG a stable solver. Besides
the new mesh scheme could save 50% computer memories compared to traditional hexahedral mesh.