We provide an easy way to accurately incorporate the effects from Q in 3D seismic wave modeling. To consider the attenuation and dispersion due to the Q in time domain, a new formulation is developed based on auxiliary ordinary differential equations. The new governing equations are in a highly parallel compact form with the purely elastic counterpart, thus only slight modifications over the original purely elastic media are required. In this framework, we extend our nonconformal discontinuous Galerkin algorithm with a new Riemann solver to accurately simulate the wave propagations in viscoelastic media. Furthermore, the couplings between viscoelastic media and purely elastic media/fluid are also straightforward. This new implementation introduces remarkably less time consumption and fewer additional storage costs than the conventional auxiliary partial differential equations-based methods.
Presentation Date: Tuesday, September 26, 2017
Start Time: 4:45 PM
Location: 381A
Presentation Type: ORAL
