Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Michael, Louisa"'
In this article we present a new formulation and an associated algorithm for the simultaneous numerical simulation of multiple condensed phase explosives in direct contact with each other, which may also be confined by (or interacting with one or mor
Externí odkaz:
http://arxiv.org/abs/2109.14425
The motivation of this work is to produce an integrated formulation for material response due to detonation wave loading. Here, we focus on elastoplastic structural response. In particular, we are interested to capture miscible and immiscible behavio
Externí odkaz:
http://arxiv.org/abs/2106.14482
The sensitizing effect of cavities in the form of microbubbles on the shock initiation of a homogeneous liquid explosive is studied computationally. While the presence of voids in an explosive has long been known to induce so-called hot spots that gr
Externí odkaz:
http://arxiv.org/abs/2008.09070
We propose a numerical methodology for the simultaneous numerical simulation of four states of matter; gas, liquid, elastoplastic solids and plasma. The distinct, interacting physical processes are described by a combination of compressible, inert an
Externí odkaz:
http://arxiv.org/abs/1905.06620
Meso-resolved simulations of shock-to-detonation transition in nitromethane with air-filled cavities
Autor:
Mi, XiaoCheng, Michael, Louisa, Ioannou, Eleftherios, Nikiforakis, Nikolaos, Higgins, Andrew J., Ng, Hoi Dick
Two-dimensional, meso-resolved numerical simulations are performed to investigate the complete shock-to-detonation transition (SDT) process in a mixture of liquid nitromethane (NM) and air-filled, circular cavities. The shock-induced initiation behav
Externí odkaz:
http://arxiv.org/abs/1905.05727
Publikováno v:
Physics of Fluids 29, 116102 (2017)
We present a numerical study of detonation propagation in unconfined explosive charges shaped as an annular arc (rib). Steady detonation in a straight charge propagates at constant speed but when it enters an annular section, it goes through a transi
Externí odkaz:
http://arxiv.org/abs/1710.07472
Publikováno v:
Journal of Applied Physics 122, 225112 (2017)
The objective of this work is to improve the robustness and accuracy of numerical simulations of both ideal and non-ideal explosives by introducing temperature dependence in mechanical equations of state for reactants and products. To this end, we mo
Externí odkaz:
http://arxiv.org/abs/1710.03540
Autor:
Michael, Louisa, Nikiforakis, Nikolaos
We study effect of cavity collapse in non-ideal explosives as a means of controlling their sensitivity. The main aim is to understand the origin of localised temperature peaks (hot spots) that play a leading order role at early ignition stages. Thus,
Externí odkaz:
http://arxiv.org/abs/1710.03167
Autor:
Michael, Louisa, Nikiforakis, Nikolaos
We study the effect of cavity collapse in non-ideal explosives as a means of controlling their sensitivity. The aim is to understand the origin of localised temperature peaks (hot spots) which play a key role at the early stages of ignition. Thus we
Externí odkaz:
http://arxiv.org/abs/1710.02429
Autor:
Michael, Louisa, Nikiforakis, Nikolaos
We propose a numerical methodology for the numerical simulation of distinct, interacting physical processes described by a combination of compressible, inert and reactive forms of the Euler equations, multiphase equations and elastoplastic equations.
Externí odkaz:
http://arxiv.org/abs/1710.01643