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Eulerian solver sensitivity for computing long-duration blast drag loading on columns

Eulerian solver sensitivity for computing long-duration blast drag loading on columns
Eulerian solver sensitivity for computing long-duration blast drag loading on columns

‘Long-duration’ blast waves can exert damaging drag loads on finite structural columns that are complex to characterise. In the absence of suitable drag coefficients, computational fluid dynamics (CFD) can be the only satisfactory approach for calculating blast loading. Commercially available CFD software with shockwave modelling capabilities require solving the Euler equations that assume inviscid flow. Two Eulerian solver types are generally used: Godunov and flux-corrected transport, the latter of which is commonly perceived as more accurate for shockwave problems. This study investigates the capability of both solvers for calculating drag loading from long-duration blast interaction with an I-section, verified through comparison to experimental measurements. No solver sensitivity was observed for pressures on exposed geometry surfaces, although discrepancies were observed for shielded surfaces, particularly during later stage interaction. The Godunov scheme demonstrated increased computational efficiency and reliability in comparison to the flux-corrected transport solver type, generating results in better agreement to experimental data. The results provided new understanding of solver sensitivity for modelling long-duration blast drag loading on finite targets using Eulerian CFD analyses.

columns, fluid mechanics, steel structures, wind loading & aerodynamics
1755-0777
1-13
Cannon, Laura
9ea58f21-10ca-4886-b623-e5a65a6bc3a9
Denny, Jack
7bd3e650-6c4e-4149-b408-2166e377b216
Clubley, Simon K.
d3217801-61eb-480d-a6a7-5873b5f6f0fd
Cannon, Laura
9ea58f21-10ca-4886-b623-e5a65a6bc3a9
Denny, Jack
7bd3e650-6c4e-4149-b408-2166e377b216
Clubley, Simon K.
d3217801-61eb-480d-a6a7-5873b5f6f0fd

Cannon, Laura, Denny, Jack and Clubley, Simon K. (2022) Eulerian solver sensitivity for computing long-duration blast drag loading on columns. Proceedings of the Institution of Civil Engineers - Engineering and Computational Mechanics, 175 (1), 1-13. (doi:10.1680/jencm.21.00008).

Record type: Article

Abstract

‘Long-duration’ blast waves can exert damaging drag loads on finite structural columns that are complex to characterise. In the absence of suitable drag coefficients, computational fluid dynamics (CFD) can be the only satisfactory approach for calculating blast loading. Commercially available CFD software with shockwave modelling capabilities require solving the Euler equations that assume inviscid flow. Two Eulerian solver types are generally used: Godunov and flux-corrected transport, the latter of which is commonly perceived as more accurate for shockwave problems. This study investigates the capability of both solvers for calculating drag loading from long-duration blast interaction with an I-section, verified through comparison to experimental measurements. No solver sensitivity was observed for pressures on exposed geometry surfaces, although discrepancies were observed for shielded surfaces, particularly during later stage interaction. The Godunov scheme demonstrated increased computational efficiency and reliability in comparison to the flux-corrected transport solver type, generating results in better agreement to experimental data. The results provided new understanding of solver sensitivity for modelling long-duration blast drag loading on finite targets using Eulerian CFD analyses.

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Accepted/In Press date: 2021
e-pub ahead of print date: 21 January 2022
Published date: 1 March 2022
Additional Information: Funding Information: All data obtained using experimental facilities remain property of the UK MoD. The authors acknowledge the UK EPSRC and AWE plc for financial support. Publisher Copyright: Copyright © 2021 Published by ICE Publishing: All rights reserved.
Keywords: columns, fluid mechanics, steel structures, wind loading & aerodynamics

Identifiers

Local EPrints ID: 454132
URI: http://eprints.soton.ac.uk/id/eprint/454132
ISSN: 1755-0777
PURE UUID: 8283e4f6-96c9-4e1a-bb2d-3367c48cb1aa
ORCID for Jack Denny: ORCID iD orcid.org/0000-0003-3181-4747
ORCID for Simon K. Clubley: ORCID iD orcid.org/0000-0003-3779-242X

Catalogue record

Date deposited: 01 Feb 2022 17:38
Last modified: 23 Nov 2022 02:52

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Contributors

Author: Laura Cannon
Author: Jack Denny ORCID iD
Author: Simon K. Clubley ORCID iD

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