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Title: Coupling CTH to Linear Acoustic Propagation across an Air-Earth Interface

Abstract

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.

Authors:
 [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
OSTI Identifier:
1669199
Report Number(s):
SAND-2020-9842
690953
DOE Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Preston, Leiph A., Eliassi, Mehdi, and Poppeliers, Christian. Coupling CTH to Linear Acoustic Propagation across an Air-Earth Interface. United States: N. p., 2020. Web. doi:10.2172/1669199.
Preston, Leiph A., Eliassi, Mehdi, & Poppeliers, Christian. Coupling CTH to Linear Acoustic Propagation across an Air-Earth Interface. United States. https://doi.org/10.2172/1669199
Preston, Leiph A., Eliassi, Mehdi, and Poppeliers, Christian. 2020. "Coupling CTH to Linear Acoustic Propagation across an Air-Earth Interface". United States. https://doi.org/10.2172/1669199. https://www.osti.gov/servlets/purl/1669199.
@article{osti_1669199,
title = {Coupling CTH to Linear Acoustic Propagation across an Air-Earth Interface},
author = {Preston, Leiph A. and Eliassi, Mehdi and Poppeliers, Christian},
abstractNote = {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.},
doi = {10.2172/1669199},
url = {https://www.osti.gov/biblio/1669199}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {9}
}