Convolution Perfectly Matched Layer (CPML) in FEM calculation for 2D acoustic wave in absorptive fluid media
LI Yi-feng1 ; WangSheng-xiang2
1.College of Electronics and Information Engineering, NanJing University of Technology, NanJing 210009, China;2.Instuite electronic, microelectronic and nanotechnology, Lille 59652, France
Abstract：A method is presented to extend the Convolution Perfectly Matched Layer (CPML), which bases the complex coordinates transformation and complex frequency shifted stretched-coordinate metrics, to the 2D acoustic equation calculated with the method of Finite Element Method (FEM) for absorptive fulid media. The main advantage of CPML over the classical PML layer is that it is based on the unsplit components of the wave field, which reduces the number of equations and leads to a more stable, highly effective absorption. In this paper, the CPML equations have been presented in frequency domain and in time domain, respectively, and the calculations have been realized in the FEM software of COMSOL. The results of numerical simulation in time domain demonstrate that CPML absorbs effectively the outgoing energy for the absorptive fluid media.
李义丰;汪胜祥 . 卷积完全匹配层在二维声波吸收流体介质中的有限元计算[J]. , 2012, 31(6): 166-170,.
LI Yi-feng;WangSheng-xiang. Convolution Perfectly Matched Layer (CPML) in FEM calculation for 2D acoustic wave in absorptive fluid media . , 2012, 31(6): 166-170,.
2012, Vol. 31 
