High-resolution numerical simulation and analysis of Mach reflection structures in detonation waves in low-pressure H2:O2:Ar mixtures: a summary of results obtained with adaptive mesh refinement framework AMROC
High-resolution numerical simulation and analysis of Mach reflection structures in detonation waves in low-pressure H2:O2:Ar mixtures: a summary of results obtained with adaptive mesh refinement framework AMROC
Numerical simulation can be key to the understanding of the multidimensional nature of transient detonation waves. However, the accurate approximation of realistic detonations is demanding as a wide range of scales needs to be resolved. This paper describes a successful solution strategy that utilizes logically rectangular dynamically adaptive meshes. The hydrodynamic transport scheme and the treatment of the nonequilibrium reaction terms are sketched. A ghost fluid approach is integrated into the method to allow for embedded geometrically complex boundaries. Large-scale parallel simulations of unstable detonation structures of Chapman-Jouguet detonations in low-pressure hydrogen-oxygen-argon mixtures demonstrate the efficiency of the described techniques in practice. In particular, computations of regular cellular structures in two and three space dimensions and their development under transient conditions, that is, under diffraction and for propagation through bends are presented. Some of the observed patterns are classified by shock polar analysis, and a diagram of the transition boundaries between possible Mach reflection structures is constructed.
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Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
2011
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Deiterding, Ralf
(2011)
High-resolution numerical simulation and analysis of Mach reflection structures in detonation waves in low-pressure H2:O2:Ar mixtures: a summary of results obtained with adaptive mesh refinement framework AMROC.
Journal of Combustion, 2011, , [738969].
(doi:10.1155/2011/738969).
Abstract
Numerical simulation can be key to the understanding of the multidimensional nature of transient detonation waves. However, the accurate approximation of realistic detonations is demanding as a wide range of scales needs to be resolved. This paper describes a successful solution strategy that utilizes logically rectangular dynamically adaptive meshes. The hydrodynamic transport scheme and the treatment of the nonequilibrium reaction terms are sketched. A ghost fluid approach is integrated into the method to allow for embedded geometrically complex boundaries. Large-scale parallel simulations of unstable detonation structures of Chapman-Jouguet detonations in low-pressure hydrogen-oxygen-argon mixtures demonstrate the efficiency of the described techniques in practice. In particular, computations of regular cellular structures in two and three space dimensions and their development under transient conditions, that is, under diffraction and for propagation through bends are presented. Some of the observed patterns are classified by shock polar analysis, and a diagram of the transition boundaries between possible Mach reflection structures is constructed.
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Accepted/In Press date: 21 February 2011
Published date: 2011
Organisations:
Aerodynamics & Flight Mechanics Group
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Local EPrints ID: 380641
URI: http://eprints.soton.ac.uk/id/eprint/380641
ISSN: 2090-1968
PURE UUID: 3fff9891-0ccc-4cf3-bc49-c15b65703c5e
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Date deposited: 09 Sep 2015 10:29
Last modified: 15 Mar 2024 03:52
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