Accession Number:

ADA285900

Title:

Parallel Computations in Hydro Acoustics

Descriptive Note:

Final rept. 1 Dec 1988-8 Aug 1993

Corporate Author:

RUTGERS - THE STATE UNIV PISCATAWAY NJDEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

1994-10-25

Pagination or Media Count:

16.0

Abstract:

This research concerns the algorithmic development, computer implementation and direct numerical simulation of incompressible and compressible flow of naval relevance. Calculations were executed on a class of current generation multiprocessors. Pseudospectral methods were used exclusively. Lack of parallel algorithms critical to the effective implementation of spectral methods on parallel computers necessitated the need for the development of parallel FFT algorithms for real, conjugate symmetric and real symmetric sequences. These algorithms are applied to spectral methods, but also in many areas of scientific computing. The last algorithm, the parallel fast discrete cosine transform, is used extensively in image and signal processing. The parallel Fourier pseudospectral method for the incompressible Navier-Stokes equations was developed and implemented on many multiprocessors. Reconnection of orthogonally interacting vortex tubes was then investigated using the algorithm on parallel computers as well as vector supercomputers. The parallel Fourier pseudospectral method for the compressible Navier-Stokes equations was also developed. Shock vortex interactions in two dimensions were investigated.

Subject Categories:

  • Computer Programming and Software
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE