Acoustics with discontinuous sound speed

CLAWPACK codes used for the calculations in the paper [4] below.

• Browse thru directory jasacodes
• Download jasacodes.tar.gz (495KB)

Some animations: (created using matlab and movie software developed by Andreas Wiegmann)

• Layered medium in one-dimension
  • piecewise constant density
  • random with piecewise constant mean density Red: constant coeff, blue: epsilon = 0.1
  • random with piecewise constant mean density Red: constant coeff, blue: epsilon = 0.3
• Reflection at an interface in two dimensions
  • piecewise constant density
  • random with piecewise constant mean density
• 2D wave in a correlated random medium
  • animation of example from Figure 13 of the the paper [4] below
• High frequency ultrasound in the brain
  • Tiernan Fogarty's homepage

References:

1. Wave propagation algorithms for multi-dimensional hyperbolic systems, J. Comput. Phys. 131 (1997), pp. 327-353.
2. High-resolution methods for rapidly varying heterogeneous media, Master's thesis by Tiernan Fogarty
3. High-Resolution Finite Volume Methods for Acoustics in a Rapidly-Varying Heterogeneous Medium by Tiernan Fogarty and R. J. LeVeque, Proc. 4'th Intl. Conf. on Wave Propagation, Golden, Colorado, June 1-5, 1998, SIAM, (J.A. DeSanto, editor), pp. 603-605.
4. High-resolution finite volume methods for acoustics in periodic or random media
   T. R. Fogarty and R. J. LeVeque, J. Acoust. Soc. Am. 106(1999), pp. 17-28.