Publications [#322899] of Qing H. Liu

Papers Published

1. Liu, QH, Modeling of A 2.5-dimensional problem in electromagnetic well logging, International Geoscience and Remote Sensing Symposium (Igarss), vol. 1 (January, 1992), pp. 215-217, IEEE, ISBN 0780301382 [doi]
   (last updated on 2023/08/08)

   Abstract:
   In this paper, the numerical mode matching (NMM) method is applied to solve a cylindrical 2;-dimensional (2 1/2-D) problem encountered in many electromagnetic well logging applications. We consider the radiation of an off-axis source in an axisymmetric inhomogeneous medium consisting of an arbitrary number of layers in both the radial and axial directions. The method of Fourier series is first used to transform the 23-D problem into a series of two-dimensional (2-D) problems, which are in turn solved by the NMM method. Like the NMM method used for the 2-D scalar problem, the NMM method used here converts a 2-D vectorial problem into several one-dimensional ones. Therefore, we expect a great saving in the computer memory and the computation time with NMM, particularly when compared with the more conventional 2-D finite element method (FEM). Several numerical examples are shown to illustrate the efficiency and the application of the NMM method.