On the direct construction of the steady traveling solution to high explosive sandwich, cylinder and aquarium tests via a streamline finite volume approximation

JOURNAL OF COMPUTATIONAL PHYSICS

卷:395

Article

Andrews, Stephen A.¹  Aslam, Tariq² 

[1] Los Alamos Natl Lab, Verificat & Anal XCP 8, Mail Stop P365, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, Phys & Chem Mat T1, Mail Stop P952, Los Alamos, NM 87545 USA

关键词: High explosives;    Approximate Riemann solver;   

DOI  :  10.1016/j.jcp.2019.06.029

来源: Elsevier

【 摘 要 】

The cylinder, sandwich and aquarium tests are common experiments used to investigate the performance of high explosives. This paper presents a solution technique which simulates these experiments as two dimensional problems in steady traveling coordinates. Using a coordinate system aligned with the streamlines of the flow, an efficient numerical scheme is developed which uses an approximate Riemann solver to model the change in state across streamlines. The technique can also accommodate arbitrary equations of state for the materials. Two verification exercises show that the algorithm converges at second order. Validation studies using the aquarium experiment agreed well with simulations, though the omission of a material strength model leads to some discrepancies between simulation and experiments for the cylinder test. This computational technique is able to predict the behavior of these common high explosive experiments on the order of minutes on a single processor with very fine spatial resolution, on the order of 10 mu m. (C) 2019 Elsevier Inc. All rights reserved.

【 授权许可】

Free