A higher-level large-eddy filtering strategy for general relativistic fluid simulations
A higher-level large-eddy filtering strategy for general relativistic fluid simulations
Nonlinear simulations of neutron star mergers are complicated by the need to represent turbulent dynamics. As we cannot (yet) perform simulations that resolve accurately both the gravitational-wave scale and the smallest scales at which magneto/hydrodynamic turbulence plays a role, we need to rely on approximations. Addressing this problem in the context of large-eddy models, we outline a coherent Lagrangian filtering framework that allows us to explore the many issues that arise, linking conceptual problems to practical implementations and the interpretation of the results. We develop understanding crucial for quantifying unavoidable uncertainties in current and future numerical relativity simulations and consider the implications for neutron-star parameter estimation and constraints on the equation of state of matter under extreme conditions.
Celora, Thomas
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Andersson, Nils
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Hawke, Ian
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Comer, G.L.
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Hatton, Marcus John
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27 December 2024
Celora, Thomas
b15e9792-aae0-479a-83c5-b5c874b19fa6
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Hawke, Ian
fc964672-c794-4260-a972-eaf818e7c9f4
Comer, G.L.
b34e5164-7f70-4ba1-b04f-2f0ed9d19d05
Hatton, Marcus John
d2214492-6ca0-4796-a148-9e4dd20e99c1
Celora, Thomas, Andersson, Nils, Hawke, Ian, Comer, G.L. and Hatton, Marcus John
(2024)
A higher-level large-eddy filtering strategy for general relativistic fluid simulations.
Physical Review D, 110 (12), [123039].
(doi:10.1103/PhysRevD.110.123039).
Abstract
Nonlinear simulations of neutron star mergers are complicated by the need to represent turbulent dynamics. As we cannot (yet) perform simulations that resolve accurately both the gravitational-wave scale and the smallest scales at which magneto/hydrodynamic turbulence plays a role, we need to rely on approximations. Addressing this problem in the context of large-eddy models, we outline a coherent Lagrangian filtering framework that allows us to explore the many issues that arise, linking conceptual problems to practical implementations and the interpretation of the results. We develop understanding crucial for quantifying unavoidable uncertainties in current and future numerical relativity simulations and consider the implications for neutron-star parameter estimation and constraints on the equation of state of matter under extreme conditions.
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Filtering_strategy
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PhysRevD.110.123039
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Accepted/In Press date: 22 October 2024
Published date: 27 December 2024
Identifiers
Local EPrints ID: 503936
URI: http://eprints.soton.ac.uk/id/eprint/503936
ISSN: 2470-0010
PURE UUID: 2b20fc8b-84db-4d93-9766-5598528553b1
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Date deposited: 18 Aug 2025 16:58
Last modified: 22 Aug 2025 01:54
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Author:
Thomas Celora
Author:
G.L. Comer
Author:
Marcus John Hatton
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