Influence of porosity on high-velocity mass-asymmetric collisions

Author:

Planes María Belén1,Millán Emmanuel N2,Urbassek Herbert M3ORCID,Bringa Eduardo M14

Affiliation:

1. CONICET and Facultad de Ingenería, Universidad de Mendoza, Mendoza 5500, Argentina

2. CONICET, Facultad de Ciencias Exactas y Naturales and ITIC, Universidad Nacional de Cuyo, Mendoza 5500, Argentina

3. Physics Department and Research Center OPTIMAS, University Kaiserslautern, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern, Germany

4. Centro de Nanotecnología Aplicada, Facultad de Ciencias, Universidad Mayor, 8580000 Huechuraba, Santiago, Chile

Abstract

ABSTRACT Using granular mechanics, we study the influence of porosity on the collisions of spherical granular aggregates with a mass ratio of around 60. At high filling factors, the projectile produces a crater on the target, similar to impacts on a granular bed. However, at low filling factors, the small projectile passes through the large target, strongly fragmenting it. By a consideration of the lateral grain velocities during the collision, we attribute this behaviour to the ‘piston effect’, in which the projectile loses momentum mainly to the grains below it. Due to an increase in grain–grain interactions as porosity decreases, the piston effect loses its importance for higher filling factors, ϕ ≳ 0.2. These results may prove useful in modelling collisions occurring in debris discs.

Funder

UNCuyo

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 9 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3