Numerical Simulation of the Collapse of an Underwater Explosion Bubble
Abstract
This project demonstrates the usefulness of front tracking as a tool for studying the fully compressible, axially symmetric expansion and collapse of an underwater explosion bubble in two spatial dimensions. In the pilot project supported by this contract, a one dimensional version of the front tracking code was implemented to compute spherically symmetric oscillations. A one dimensional, tracked random choice code 1 was adapted for this pilot project, and validated against published computational and experimental results. Specifically, comparisons were made with untracked, random choice calculations. These validation studies identified several improvements required by the tracked algorithm. These included 1) the necessity for realistic equations of state for the explosion products (stiffened gamma law gas equations of state where used in the study), 2) the implementation of effective boundary conditions that would take into account the progress of the primary shock wave into the water without the necessary of keeping it within the computational domain, 3) improved treatment of the divergence at the bubble center, and 4) correct initiation (i. e. velocity profile) of the explosion remains.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1988
- Accession Number
- ADA203746
Entities
People
- W. B. Lindquist
Organizations
- New York University