Disintegration and separation of the bilobate-shaped meteoric fragment during hypersonic atmospheric entry

IF 2.5 2区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Icarus Pub Date : 2025-02-27 DOI:10.1016/j.icarus.2025.116537

Ziwen Li , Yong Yu , Xiangyuan Zeng , Haoyu Li , Tongge Wen , Xiaoran Yan

引用次数: 0

Abstract

A novel method for simulating the disintegration of bilobate-shaped meteoric fragments is presented, which integrates aerodynamic interactions, rotational dynamics, structural strength, and ablation into the analysis. A disintegration criterion is proposed in this method, based on a comparison between the mechanism strength of the sintered bond and the required contact force to maintain the integrity of the bilobate shape. The disintegration of fragment 109 from the Morávka meteoroid, which deviates from the Weibull-like scaling law, is explained physically by applying this approach. Predictive numerical simulations are conducted by varying the initial attitudes, geometries, strengths, and angular velocities of the bilobate-shaped fragments. During atmospheric entry, variations in attitude, landing positions, and residual masses are analyzed as indicators of characteristics in the dynamical evolution.

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来源期刊

Icarus 地学天文-天文与天体物理

CiteScore

6.30

自引率

18.80%

发文量

356

审稿时长

2-4 weeks

期刊介绍： Icarus is devoted to the publication of original contributions in the field of Solar System studies. Manuscripts reporting the results of new research - observational, experimental, or theoretical - concerning the astronomy, geology, meteorology, physics, chemistry, biology, and other scientific aspects of our Solar System or extrasolar systems are welcome. The journal generally does not publish papers devoted exclusively to the Sun, the Earth, celestial mechanics, meteoritics, or astrophysics. Icarus does not publish papers that provide "improved" versions of Bode''s law, or other numerical relations, without a sound physical basis. Icarus does not publish meeting announcements or general notices. Reviews, historical papers, and manuscripts describing spacecraft instrumentation may be considered, but only with prior approval of the editor. An entire issue of the journal is occasionally devoted to a single subject, usually arising from a conference on the same topic. The language of publication is English. American or British usage is accepted, but not a mixture of these.