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Globally smooth approximations for shock pressure decay in impacts

Ruedas, T. (2017) Globally smooth approximations for shock pressure decay in impacts. Icarus, 289, pp. 22-33. Elsevier. DOI: 10.1016/j.icarus.2017.02.008 ISSN 0019-1035

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Official URL: http://dx.doi.org/10.1016/j.icarus.2017.02.008

Abstract

New forms of empirical formulae that provide an approximate description of the decay of shock pressure with distance in hypervelocity impacts are proposed. These forms, which are intended for use in applications such as large-scale mantle convection models, are continuous and smooth from the point of impact to arbitrarily large distances, thereby avoiding the need to divide the domain into different decay regimes and yielding the maximum pressure in a self-consistent way without resorting to the impedance-match solution. Individual fits for different impact velocities as well as a tentative general fitting formula are given, especially for the case of dunite-on-dunite impacts. The temperature effects resulting from the shock are estimated for different decay models, and the differences between them are found to be substantial in some cases, potentially leading to over- or underestimates of impact heating and melt production in modeling contexts like mantle convection, where such parameterizations are commonly used to represent giant impacts.

Item URL in elib:https://elib.dlr.de/111193/
Document Type:Article
Title:Globally smooth approximations for shock pressure decay in impacts
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ruedas, T.thomas.ruedas (at) dlr.dehttps://orcid.org/0000-0002-7739-1412
Date:June 2017
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:289
DOI :10.1016/j.icarus.2017.02.008
Page Range:pp. 22-33
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Impact processes; Terrestrial planets; Thermal histories; Interiors
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Planetary Evolution and Life
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Ruedas Gomez, Thomas
Deposited On:11 Apr 2017 12:54
Last Modified:06 Sep 2019 15:26

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