A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of state

In this investigation, the shockwave propagation caused by the explosive detonation in a complex environment has been studied by the open-source Computational Fluid Dynamics (CFD) package, OpenFOAM®. An extended solver was developed to take the effect of explosion energy into account. The Becker-Kis...

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Main Authors: Zeinab Noorpoor, Saeed Tavangar, Hosein Soury, Seyed Ghorban Hosseini
Format: Article
Language:English
Published: Elsevier 2020-12-01
Series:Heliyon
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2405844020326943
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spelling doaj-2dddf4b22d0342c1932d3671b48eb8f02020-12-31T04:43:19ZengElsevierHeliyon2405-84402020-12-01612e05852A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of stateZeinab Noorpoor0Saeed Tavangar1Hosein Soury2Seyed Ghorban Hosseini3Chemical Engineering, Malek-Ashtar University of Technology, Tehran, IranChemical Engineering, Malek-Ashtar University of Technology, Tehran, Iran; Corresponding author.Mechanical Engineering, Malek-Ashtar University of Technology, Tehran, IranInorganic Chemistry, Malek-Ashtar University of Technology, Tehran, IranIn this investigation, the shockwave propagation caused by the explosive detonation in a complex environment has been studied by the open-source Computational Fluid Dynamics (CFD) package, OpenFOAM®. An extended solver was developed to take the effect of explosion energy into account. The Becker-Kistiakowsky-Wilson (BKW) equation of state (EOS) was implemented in OpenFOAM® to calculate the detonation impact on the surrounding fluid density variations. Also, the influence of two turbulence modeling approaches of Reynolds-averaged Navier-Stokes (RANS) and Large-eddy Simulation (LES) on the prediction of explosion pressure was studied and compared against previous experimental and numerical studies. The comparisons demonstrated the accuracy of the implemented BKW EOS in calculating the fluid density. Further, it was shown that the LES approach is capable of capturing the unsteady nature of detonation in the near-field of the explosive. Examining the instantaneous velocity vectors of the LES results revealed sequential wave fronts that were responsible for rapid changes in the pressure signals. Furthermore, ground pressure contours demonstrated that the shock waves spread on the ground in a circular shape. The results of the current study suggested that the OpenFOAM® technology is powerful to incorporate various physical models, including the equation of state and scale-resolving methods such as LES, to capture the complex nature of the detonation phenomenon.http://www.sciencedirect.com/science/article/pii/S2405844020326943sonicFoamEquation of stateSource termBlastNumerical simulation
collection DOAJ
language English
format Article
sources DOAJ
author Zeinab Noorpoor
Saeed Tavangar
Hosein Soury
Seyed Ghorban Hosseini
spellingShingle Zeinab Noorpoor
Saeed Tavangar
Hosein Soury
Seyed Ghorban Hosseini
A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of state
Heliyon
sonicFoam
Equation of state
Source term
Blast
Numerical simulation
author_facet Zeinab Noorpoor
Saeed Tavangar
Hosein Soury
Seyed Ghorban Hosseini
author_sort Zeinab Noorpoor
title A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of state
title_short A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of state
title_full A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of state
title_fullStr A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of state
title_full_unstemmed A Computational Fluid Dynamics approach for air blast propagation using OpenFOAM and Becker-Kistiakowsky-Wilson equation of state
title_sort computational fluid dynamics approach for air blast propagation using openfoam and becker-kistiakowsky-wilson equation of state
publisher Elsevier
series Heliyon
issn 2405-8440
publishDate 2020-12-01
description In this investigation, the shockwave propagation caused by the explosive detonation in a complex environment has been studied by the open-source Computational Fluid Dynamics (CFD) package, OpenFOAM®. An extended solver was developed to take the effect of explosion energy into account. The Becker-Kistiakowsky-Wilson (BKW) equation of state (EOS) was implemented in OpenFOAM® to calculate the detonation impact on the surrounding fluid density variations. Also, the influence of two turbulence modeling approaches of Reynolds-averaged Navier-Stokes (RANS) and Large-eddy Simulation (LES) on the prediction of explosion pressure was studied and compared against previous experimental and numerical studies. The comparisons demonstrated the accuracy of the implemented BKW EOS in calculating the fluid density. Further, it was shown that the LES approach is capable of capturing the unsteady nature of detonation in the near-field of the explosive. Examining the instantaneous velocity vectors of the LES results revealed sequential wave fronts that were responsible for rapid changes in the pressure signals. Furthermore, ground pressure contours demonstrated that the shock waves spread on the ground in a circular shape. The results of the current study suggested that the OpenFOAM® technology is powerful to incorporate various physical models, including the equation of state and scale-resolving methods such as LES, to capture the complex nature of the detonation phenomenon.
topic sonicFoam
Equation of state
Source term
Blast
Numerical simulation
url http://www.sciencedirect.com/science/article/pii/S2405844020326943
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