Papers abstract:

Underwater explosion is an extremely complex hydrodynamic problem and it is always divided into two stages and studied individually, i.e., shock wave stage and bubble motion stage. Actually underwater explosion is a continuous process and there are intensive interactions between the two stages in some cases, e.g. underwater explosion in the vicinity of the wall. In this paper, the Eulerian finite element formulation considering the fluid compressibility is applied to continuously simulate the process of underwater explosion based on the subroutine of ABAQUS. Firstly, the governing equation and its solution by the operator splitting approach are discussed. Then the free-field underwater explosion is continuously simulated, including shock wave propagation and the bubble expansion, contraction, collapse, jet and rebound. The applicability and reliability of this method are discussed by comparing with experimental results from Klaseboer [5]. Furthermore, the traditional treatments of the simulation initialized at the bubble motion stage are discussed. Finally, the underwater explosion near wall is investigated regarding the interactions of shock wave and bubble motion and the importance of the continuous simulation of underwater explosion on the bubble motion characteristics is summarized.

Product Overview:
This package provides a comprehensive Abaqus tutorial and simulation files for modeling underwater explosions using the Eulerian finite element method. The tutorial follows the methodology from W.T. Liu et al. and is designed to replicate the shock wave propagation and bubble dynamics observed in real-world underwater detonation scenarios. Key simulation steps include:

• Setting up a 3D Eulerian model with TNT, water, and air in a single part.
• Checking key outputs such as:
  • Explosive growth visualization (TNT expansion in water and air).
  • Shock wave propagation and interaction with materials.
  • Pressure, velocity, and acceleration plots at different nodes.
• The method ensures realistic modeling of fluid interactions and shockwave effects using the Eulerian approach.

In this tutorial, the whole process of underwater explosion is simulated according to data from the study by W.T. Liu et al.