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Record 20 of 8782
An implicit method for two-dimensional hydrodynamics. [in stellar evolution]
External Online Source: doi:10.1086/172950
Author and Affiliation:
Livne, Eli(Steward Observatory, Tucson, AZ, United States)
Abstract: An implicit method for compressible multidimensional flows is presented. The method, which is strongly oriented toward astrophysical applications, enables one to simulate very subsonic flows by removing the Courant condition upon time steps. It consists of an implicit purely Lagrangian step, followed by an explicit and second-order accurate (at least in one dimension) remapping step, which is optional. When the remapping step is performed the time step is limited by the 'particle crossing time' and otherwise it is limited only by accuracy considerations. The suggested method, which results from a compromise between accuracy and efficiency, is very efficient relative to other methods. It enables the computation of many multidimensional problems in stellar evolution, such as those governed by very subsonic flows, which were not calculable with existing explicit methods.
Publication Date: Aug 01, 1993
Document ID:
19930066695
(Acquired Dec 28, 1995)
Accession Number: 93A50692
Subject Category: FLUID MECHANICS AND HEAT TRANSFER
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 412; 2; p. 634-647.
Publisher Information: United States
Contract/Grant/Task Num: NAGW-2450
Financial Sponsor: NASA; United States
Organization Source: NASA; Washington, DC, United States
Description: 14p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: HYDRODYNAMIC EQUATIONS; LAGRANGIAN FUNCTION; STELLAR EVOLUTION; TWO DIMENSIONAL FLOW; EULER EQUATIONS OF MOTION; SUBSONIC FLOW; TAYLOR INSTABILITY
Imprint And Other Notes: Astrophysical Journal, Part 1 vol. 412, no. 2 p. 634-647. Aug. 1, 1993
Availability Source: Other Sources
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