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An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation

Matthew A. Price, Vinh-Tan Nguyen, Oubay Hassan Orcid Logo, Kenneth Morgan Orcid Logo

International Journal for Numerical Methods in Engineering, Volume: 106, Issue: 11, Pages: 904 - 926

Swansea University Authors: Oubay Hassan Orcid Logo, Kenneth Morgan Orcid Logo

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DOI (Published version): 10.1002/nme.5155

Abstract

In this paper, a method is proposed for modeling explosive-driven fragments as spherical particles with a point-particle approach. Lagrangian particles are coupled with a multimaterial Eulerian solver that uses a three-dimensional finite volume framework on unstructured grids. The Euler–Lagrange met...

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Published in: International Journal for Numerical Methods in Engineering
ISSN: 0029-5981
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa28311
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spelling 2020-10-21T14:42:12.2181255 v2 28311 2016-05-25 An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation 07479d73eba3773d8904cbfbacc57c5b 0000-0001-7472-3218 Oubay Hassan Oubay Hassan true false 17f3de8936c7f981aea3a832579c5e91 0000-0003-0760-1688 Kenneth Morgan Kenneth Morgan true false 2016-05-25 CIVL In this paper, a method is proposed for modeling explosive-driven fragments as spherical particles with a point-particle approach. Lagrangian particles are coupled with a multimaterial Eulerian solver that uses a three-dimensional finite volume framework on unstructured grids. The Euler–Lagrange method provides a straightforward and inexpensive alternative to directly resolving particle surfaces or coupling with structural dynamics solvers. The importance of the drag and inviscid unsteady particle forces is shown through investigations of particles accelerated in shock tube experiments and in condensed phase explosive detonation. Numerical experiments are conducted to study the acceleration of isolated explosive-driven particles at various locations relative to the explosive surface. The point-particle method predicts fragment terminal velocities that are in good agreement with simulations where particles are fully resolved, while using a computational cell size that is eight times larger. It is determined that inviscid unsteady forces are dominating for particles sitting on, or embedded in, the explosive charge. The effect of explosive confinement, provided by multiple particles, is investigated through a numerical study with a cylindrical C4 charge. Decreasing particle spacing, until particles are touching, causes a 30–50% increase in particle terminal velocity and similar increase in gas impulse. Journal Article International Journal for Numerical Methods in Engineering 106 11 904 926 0029-5981 computational fluid dynamics; multiphase flow; detonation; particles; fragments; shockwaves 15 6 2016 2016-06-15 10.1002/nme.5155 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2020-10-21T14:42:12.2181255 2016-05-25T13:50:15.9110071 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Matthew A. Price 1 Vinh-Tan Nguyen 2 Oubay Hassan 0000-0001-7472-3218 3 Kenneth Morgan 0000-0003-0760-1688 4
title An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation
spellingShingle An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation
Oubay Hassan
Kenneth Morgan
title_short An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation
title_full An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation
title_fullStr An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation
title_full_unstemmed An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation
title_sort An Euler-Lagrange particle approach for modeling fragments accelerated by explosive detonation
author_id_str_mv 07479d73eba3773d8904cbfbacc57c5b
17f3de8936c7f981aea3a832579c5e91
author_id_fullname_str_mv 07479d73eba3773d8904cbfbacc57c5b_***_Oubay Hassan
17f3de8936c7f981aea3a832579c5e91_***_Kenneth Morgan
author Oubay Hassan
Kenneth Morgan
author2 Matthew A. Price
Vinh-Tan Nguyen
Oubay Hassan
Kenneth Morgan
format Journal article
container_title International Journal for Numerical Methods in Engineering
container_volume 106
container_issue 11
container_start_page 904
publishDate 2016
institution Swansea University
issn 0029-5981
doi_str_mv 10.1002/nme.5155
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 0
active_str 0
description In this paper, a method is proposed for modeling explosive-driven fragments as spherical particles with a point-particle approach. Lagrangian particles are coupled with a multimaterial Eulerian solver that uses a three-dimensional finite volume framework on unstructured grids. The Euler–Lagrange method provides a straightforward and inexpensive alternative to directly resolving particle surfaces or coupling with structural dynamics solvers. The importance of the drag and inviscid unsteady particle forces is shown through investigations of particles accelerated in shock tube experiments and in condensed phase explosive detonation. Numerical experiments are conducted to study the acceleration of isolated explosive-driven particles at various locations relative to the explosive surface. The point-particle method predicts fragment terminal velocities that are in good agreement with simulations where particles are fully resolved, while using a computational cell size that is eight times larger. It is determined that inviscid unsteady forces are dominating for particles sitting on, or embedded in, the explosive charge. The effect of explosive confinement, provided by multiple particles, is investigated through a numerical study with a cylindrical C4 charge. Decreasing particle spacing, until particles are touching, causes a 30–50% increase in particle terminal velocity and similar increase in gas impulse.
published_date 2016-06-15T03:34:26Z
_version_ 1763751458851782656
score 11.016235

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