CFD of Complex Three-Dimensional Multiphase Flowfields
Abstract
Research multiphase Navier-Stokes (NS) models were extended/formulated to provide the framework for analyzing post-hit C/B aerodynamic breakup scenarios with an emphasis on bulk liquid payloads. A detailed flyout and aero-breakup study of a high-speed blob is presented, showing the full dynamics from blob flyout to droplet wake cloud formation. Neutralization of droplet clouds by conventional chemical explosive mechanisms was investigated. Marked sensitivities were found to the droplet sizes and timing of the explosion relative to the clouds trajectory. Thus, the possibility of neutralization countermeasures for lower altitude C/B threats appears viable. An engineering model, SDROP, is described, which tracks a droplet, from high altitude to the ground, accounting for shape deformation, variable internal temperature and vaporization effects. The importance of including advanced models of these effects and their impact on droplet survivability are discussed. In the course of performing the work described, limitations in the ability of the CRAFT code to analyze varied aspects of the bulk liquid flyout/breakup problem with high accuracy were identified. Progress toward addressing these limitations is described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2002
- Accession Number
- ADA398890
Entities
People
- A. Hosangadl
- E. R. Perrell
- N. A. Tonello
- N. Sinha
- S. M. Dash