Accession Number:

ADA346018

Title:

Model Validations and Predictions for Water Barrier Defense

Descriptive Note:

Final rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC PHYSICAL ACOUSTICS BRANCH

Report Date:

1998-05-12

Pagination or Media Count:

38.0

Abstract:

Validations of a mathematic model and computational code for predicting shallow-depth explosion plume behavior are presented. The model is based on a generalized formulation of hydrodynamics and uses an incompressible liquid assumption. This formulation is well suited for predicting long-time bubble and plume dynamics. Initial conditions for the model are derived from spherically symmetric bubble theory, combined with empirical measurements. The effect of fingering of plumes occurring at the center of simultaneously detonated discrete charges in a line is modeled empirically as a recess in the surface due to shock interaction. This model is validated by comparing a three-dimensional 3-D computation to observations from an experiment. Quantitative measurements of plume heights and plume densities using conductivity probes and microwave absorption are also compared to the computational data using both 2-D line charge and 3-D discrete charge models. Finally, an optimal depth study based on computations of 2-D line charges is presented.

Subject Categories:

  • Antimissile Defense Systems
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE