TY - JOUR
T1 - Disintegration and separation of the bilobate-shaped meteoric fragment during hypersonic atmospheric entry
AU - Li, Ziwen
AU - Yu, Yong
AU - Zeng, Xiangyuan
AU - Li, Haoyu
AU - Wen, Tongge
AU - Yan, Xiaoran
N1 - Publisher Copyright:
© 2025 Elsevier Inc.
PY - 2025/6
Y1 - 2025/6
N2 - 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.
AB - 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.
KW - Asteroid dynamics
KW - Asteroids
KW - Disintegration
KW - Impact process
KW - Meteoroids
UR - http://www.scopus.com/inward/record.url?scp=86000133666&partnerID=8YFLogxK
U2 - 10.1016/j.icarus.2025.116537
DO - 10.1016/j.icarus.2025.116537
M3 - Article
AN - SCOPUS:86000133666
SN - 0019-1035
VL - 433
JO - Icarus
JF - Icarus
M1 - 116537
ER -