Resolution as a Computational Factor in ALEGRA Simulations of a Shaped-Charge Jet

Abstract

Uncertainty associated with changing resolution in ALEGRA simulations of a 65-mm-diameter shaped-charge-jet device is investigated. The ALEGRA code is found to be well-behaved as resolution decreases, with several measured jet properties exhibiting limiting behavior and convergence of outcomes between 2-D and 3-D simulations. Estimates of the expected mean value and distribution widths for these properties as a function of resolution are provided. Mass loss in the jet due to discretization, resolution dependence of jet temperature, and observations of unphysical jet tip morphology at very fine resolutions are also reported.

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Document Details

Document Type
Technical Report
Publication Date
May 04, 2020
Accession Number
AD1097945

Entities

People

  • Daniel J. Hornbaker

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Coordinate Systems
  • Data Analysis
  • Department Of Defense
  • Diameters
  • Energy
  • Equations
  • Explosive Charges
  • Explosive Devices
  • Explosives
  • Geometry
  • Heat Capacity
  • Heat Energy
  • High Resolution
  • Kinetic Energy
  • Linear Momentum
  • Materials
  • Measurement
  • Physical Properties
  • Shaped Charge Jets
  • Shaped Charges
  • Simulations
  • Specific Heat
  • Three Dimensional
  • Two Dimensional
  • Uncertainty

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Image Processing and Computer Vision.
  • Plasma Physics.