(NURP) Advancing the State-of-the-Art in Particulate Dispersal Modeling in Underwater Explosion Applications through Physics-Based Simulations
Abstract
ABSTRACT:Modern underwater explosives and emerging underwater concepts rely on multiphase technology to drive rapid heat release and attain higher performance. It is therefore important to develop an in-depth understanding of, and capability to model, the multiphase dynamics and reactions that drive these applications. A large gap in our understanding of closure models exists in the detonation and early bubble expansion phases. For a particle-laden underwater explosive these early stages are critical. The proposed research will address this gap by developing Subgrid scale (SGS) models that can be applied in multiphase DYSMAS simulations that will be used for future underwater explosion simulations. We will investigate in detail the multiphase dynamics occurring as an initial detonation wave and subsequent expansion wave from the charge boundary sweeps over a bed of particles using micro-scale Direct Numerical Simulation (DNS). These fully resolved simulations will consider systems with O(1000) particles, but they will provide fundamental information from first principles at an unprecedented level of detail. SGS models developed will be used in mesoscale simulations of an underwater explosion event using point particle modeling.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 26, 2018
- Source ID
- N000141812478
Entities
People
- Sivaramakrishnan Balachandar
Organizations
- Office of Naval Research
- United States Navy
- University of Florida