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A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids

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

Computers & Fluids, Volume: 111, Pages: 76 - 90

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

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DOI (Published version): 10.1016/j.compfluid.2015.01.006

Abstract

An efficient method for the simulation of compressible multimaterial flows with a general form of equation of state is presented for explosive detonation and airblast applications. Multimaterial flows are modeled with a volume-fraction type approach for immiscible fluids governed by the compressible...

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Published in: Computers & Fluids
ISSN: 0045-7930
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa21115
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first_indexed 2015-05-07T02:10:10Z
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spelling 2020-12-17T11:10:12.3557933 v2 21115 2015-05-06 A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids 07479d73eba3773d8904cbfbacc57c5b 0000-0001-7472-3218 Oubay Hassan Oubay Hassan true false 17f3de8936c7f981aea3a832579c5e91 0000-0003-0760-1688 Kenneth Morgan Kenneth Morgan true false 2015-05-06 CIVL An efficient method for the simulation of compressible multimaterial flows with a general form of equation of state is presented for explosive detonation and airblast applications. Multimaterial flows are modeled with a volume-fraction type approach for immiscible fluids governed by the compressible Euler equations on three-dimensional unstructured grids. The five-equation quasi-conservative system is discretized in space using an edge-based finite volume approach with a second-order accurate HLLC approximate Riemann solver and temporal discretization with an explicit multistage Runge–Kutta method. The computational model is robust enough to handle flows with strong shocks, while being general enough to model materials with different equations of state and physical states. Numerical tests demonstrate the accuracy of the method for strong shock and interface interactions. A program burn method is implemented to describe the conversion of solid unreacted explosive to reacted gases in condensed phase detonations. The accuracy of the burn model is validated by comparison with published numerical results of flow profiles during detonation and for near-field airblast. Numerical simulations of hemispherical and plate-shaped explosive charge detonations are performed to investigate the influence of charge shape on airblast. The predicted pressure and impulse from simulation compare well with published experimental data. Journal Article Computers & Fluids 111 76 90 0045-7930 16 4 2015 2015-04-16 10.1016/j.compfluid.2015.01.006 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2020-12-17T11:10:12.3557933 2015-05-06T15:17:55.4404948 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 A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids
spellingShingle A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids
Oubay Hassan
Kenneth Morgan
title_short A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids
title_full A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids
title_fullStr A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids
title_full_unstemmed A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids
title_sort A method for compressible multimaterial flows with condensed phase explosive detonation and airblast on unstructured grids
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 Computers & Fluids
container_volume 111
container_start_page 76
publishDate 2015
institution Swansea University
issn 0045-7930
doi_str_mv 10.1016/j.compfluid.2015.01.006
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 An efficient method for the simulation of compressible multimaterial flows with a general form of equation of state is presented for explosive detonation and airblast applications. Multimaterial flows are modeled with a volume-fraction type approach for immiscible fluids governed by the compressible Euler equations on three-dimensional unstructured grids. The five-equation quasi-conservative system is discretized in space using an edge-based finite volume approach with a second-order accurate HLLC approximate Riemann solver and temporal discretization with an explicit multistage Runge–Kutta method. The computational model is robust enough to handle flows with strong shocks, while being general enough to model materials with different equations of state and physical states. Numerical tests demonstrate the accuracy of the method for strong shock and interface interactions. A program burn method is implemented to describe the conversion of solid unreacted explosive to reacted gases in condensed phase detonations. The accuracy of the burn model is validated by comparison with published numerical results of flow profiles during detonation and for near-field airblast. Numerical simulations of hemispherical and plate-shaped explosive charge detonations are performed to investigate the influence of charge shape on airblast. The predicted pressure and impulse from simulation compare well with published experimental data.
published_date 2015-04-16T03:25:00Z
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score 11.016235

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