Numerical simulations on the attenuation effect of a barrier material on a blast wave |
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| Institution: | 1. Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan;2. Toyama National College of Technology, 1-2 Ebie-neriya, Imizu, Toyama 933-0293, Japan;1. Department of Information Engineering and Mathematics, University of Siena, Siena, Italy;2. Comesa SrL, Prato, Italy;1. Department of Ophthalmology, University of Tennessee Health Science Center, Memphis, TN, United States;2. Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, United States;3. Department of Anatomy & Neurobiology, University of Tennessee Health Science Center, Memphis, TN, United States;1. Defence Research and Development Organisation, Chief Construction Engineer (R&D) South, Secunderabad 500003, Telangana, India;2. Department of Civil Engineering, Indian Institute of Technology (ISM)Dhanbad, Dhanbad 826004, Jharkahand, India;3. SS Infrastructure Development Consultants Limited, London, Cheyne Terrace, 10 Fenschurch, United Kingdom;4. Department of Mechanical Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, United Kingdom;5. Defence Research and Development Organisation, Centre for Fire, Explosive and Environment Safety, Timarpur – 110054, New Delhi, India |
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| Abstract: | This paper numerically modeled previous experimental results and quantitatively revealed the attenuation effect of a barrier material on a blast wave. Four fluids were considered in the present study: the detonation products, water, foamed polystyrene, and air. These fluids were modeled by Jones-Wilkins-Lee (JWL), stiffened gas, and ideal gas equations of state. A mixture of water and foamed polystyrene was used as a barrier to encircle a 0.1 kg mass of spherical pentolite, and the interface problem between the barrier and the blast wave was investigated. The simulation parameters were the radius and the water volume fraction of the barrier. To elucidate the effect of the barrier, we conducted two series of numerical simulations; one without a barrier, and another with a barrier of 50 or 100 mm in outer radius and 0–1 in the water volume fraction. Peak overpressure, positive impulse, and pressure history all agreed well with the previous experimental results. We focused on the energy transfer from high-pressure detonation products to other fluids. The sum of the kinetic energies of the detonation products and the barrier induced by the blast wave could quantitatively estimate the attenuation effect of the blast wave and was minimized when the water volume fraction was 0.5, as was the case in the previous experiment. |
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| Keywords: | Numerical modeling Attenuation effect Blast wave Barrier Energy estimation |
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