Accession Number:

AD1107171

Title:

Resolution as a Computational Factor in ALEGRA Simulations of a Shaped Charge Jet: Supplemental Study

Descriptive Note:

Technical Report,01 May 2020,31 Jul 2020

Corporate Author:

CCDC Army Research Laboratory Aberdeen Proving Ground United States

Personal Author(s):

Report Date:

2020-08-24

Pagination or Media Count:

42.0

Abstract:

This report follows up on three open questions from a previous study of resolution effects in ALEGRA simulations of a 65-mm shaped charge jet. The underlying cause of fragmented morphology observed in the leading portion of jets at high resolution is investigated. The dependence of the thermodynamic state in the pressure head on temporal discretization is determined. Finally, the accuracy of estimates for resolution-dependent numerical uncertainty is tested against ensembles of randomized simulations at varying resolution.

Subject Categories:

  • Combustion and Ignition
  • Ammunition and Explosives
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE