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Title: Absorbing boundary and free-surface conditions in lattice solid approaches

Abstract

Absorbing boundary conditions are necessary for any numerical approach to wave propagation in an unbounded model due to the computer memory size limit. The phononic lattice solid by interpolation (PLSI) and the phononic lattice solid with fluids (PLSF) are microscopic approaches for modelling wave phenomena in strongly heterogeneous media based on the Boltzmann lattice gas methods. An absorbing boundary condition for these microscopic approaches has been designed by setting the microscopic reflection coefficients at the borders. The viscosities of the viscous absorbing boundary layers are adjusted by choosing different values of the mean number densities of quasi-particles. Numerical examples using the PLSI demonstrate that the artificial boundary reflections can be eliminated almost completely when the incidence angle is less than approximately 70{degrees}. Beyond this angle, the artificial boundary reflections are not easy to attenuate.

Authors:
 [1]
  1. Univ. of California, Santa Cruz, CA (United States)
Publication Date:
OSTI Identifier:
543003
Report Number(s):
CONF-951013-
TRN: 97:004463-0192
Resource Type:
Conference
Resource Relation:
Conference: SEG `95: 65. annual meeting and international exposition of the Society of Exploration Geophysicists (SEG), Houston, TX (United States), 8-13 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of SEG/Houston `95 - technical program; PB: 1623 p.
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 58 GEOSCIENCES; SEISMIC SURVEYS; DATA ANALYSIS; PETROLEUM DEPOSITS; EXPLORATION; SEISMIC WAVES; WAVE PROPAGATION

Citation Formats

Huang, Lian-Jie. Absorbing boundary and free-surface conditions in lattice solid approaches. United States: N. p., 1995. Web.
Huang, Lian-Jie. Absorbing boundary and free-surface conditions in lattice solid approaches. United States.
Huang, Lian-Jie. 1995. "Absorbing boundary and free-surface conditions in lattice solid approaches". United States.
@article{osti_543003,
title = {Absorbing boundary and free-surface conditions in lattice solid approaches},
author = {Huang, Lian-Jie},
abstractNote = {Absorbing boundary conditions are necessary for any numerical approach to wave propagation in an unbounded model due to the computer memory size limit. The phononic lattice solid by interpolation (PLSI) and the phononic lattice solid with fluids (PLSF) are microscopic approaches for modelling wave phenomena in strongly heterogeneous media based on the Boltzmann lattice gas methods. An absorbing boundary condition for these microscopic approaches has been designed by setting the microscopic reflection coefficients at the borders. The viscosities of the viscous absorbing boundary layers are adjusted by choosing different values of the mean number densities of quasi-particles. Numerical examples using the PLSI demonstrate that the artificial boundary reflections can be eliminated almost completely when the incidence angle is less than approximately 70{degrees}. Beyond this angle, the artificial boundary reflections are not easy to attenuate.},
doi = {},
url = {https://www.osti.gov/biblio/543003}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Conference:
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