Coupling CTH to Linear Acoustic Propagation across an Air-Earth Interface
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
The interface between the Earth and the atmosphere forms a strong contrast in material properties. As such, numerical issues can arise when simulating an elastic wavefield across such a boundary when using a numerical simulation scheme. This is exacerbated when two different simulation codes are coupled straddling that interface. In this report we document how we implement the coupling of CTH, a nonlinear shock physics code, to a linearized elastic/acoustic wave propagation algorithm, axiElasti, across the air-earth interface. We first qualitatively verify that this stable coupling between the two algorithms produces expected results with no visible effects of the coupling interface. We then verify the coupling interface quantitatively by checking consistency with results from previous work and with coupled acoustic-elastic seismo-acoustic source inversions in three earth materials.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
- DOE Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1669199
- Report Number(s):
- SAND--2020-9842; 690953
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nonlinear to Linear Elastic Code Coupling in 2-D Axisymmetric Media.
Partitioned Coupling for Structural Acoustics