Extension of MINE6D to General Mine-Shaped Bodies
Abstract
The ultimate goal is to develop an effective physics-based simulation model that is capable of reliably predicting the motion of a three-dimensional mine-shaped object impacting water surface from air and subsequently dropping through water toward the sea bottom. This deterministic model provides the velocity and orientation of mines as the key input for bottom impact/burial prediction and is an essential building block in stochastic model development for mine impact/burial prediction. In our previous work, we developed a deterministic physics-based model, MINE6D, which is capable of predicting the motion of a cylindrical-shaped mine impacting the water surface and subsequently dropping through the water toward the sea bottom (Mann et al 2007). MINE6D accounts for six-degree- of-freedom motions of the body and employs physics-based modeling of key hydrodynamic effects such as viscous drag, air entrainment, and water surface impact. The main objective of this work is to extend the capabilities of MINE6D for cylindrical mines to general mine shapes. The focus of the study is on the developments in the following three key areas: 1. Expand the capabilities of MINE6D to general mine shapes and obtain the motion characteristics for different classes of mine shapes for which qualitatively different motion features (from those of cylindrical mines) might be expected. 2. Incorporate the new generation of bluff body drag treatment into MINE6D for general mine shapes and obtain deterministic and stochastic datasets as well as model coefficients to support expert systems for predicting the motions and bottom burial of different classes of mines. 3. Improve physical modeling in MINE6D in key areas that affect the reliability of motion predictions: viscous drag due to three-dimensional flow separation and vortex shedding, water surface impact, and air entrainment behind and/or around the body.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2007
- Accession Number
- ADA514906
Entities
People
- Dick K P Yue
- Yuming Liu
Organizations
- Massachusetts Institute of Technology