[CIG-SEISMO] SPECFEM3D attenuation medium and anisotropic PML?

[zhuangmw]

Dear CIG-seismo


I'm currently studying at SPECFEM3D. I am trying to simulate homogeneous medium with Qmu and Qkappa values, and using C-PML absorbing boundary condition at 6 sides.
It is strange that the waveform of the displacement ( or velocity ) field have strong reflected wave. 
So, I would like to ask you C-PML whether can absorbing attenuation medium in SPECFEM3D software?  


Now, case 1:  "ATTENUATION = .false. ", not attenuation,
         case 2:  "ATTENUATION = .true." , Qmu = 0 or Qmu = 9999 
In either case, the result is the same in theory. These two model gave different results. My guess is that the C-PML arising from the reflected wave. 


Question 2 :
Do you have to complete the anisotropic C-PML?




Best regards,
Mingwei Zhuang


--
Mingwei Zhuang
Institute of Electromagnetics and Acoustics
Xiamen University, Xiamen, China
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