Collision-Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

被引：17

作者：

Nietiadi, Maureen L. ^{[1
,2
]}

Umstaetter, Philipp ^{[1
,2
]}

Alhafez, Iyad Alabd ^{[1
,2
]}

Rosandi, Yudi ^{[3
]}

Bringa, Eduardo M. ^{[4
,5
]}

Urbassek, Herbert M. ^{[1
,2
]}

机构：

[1] Univ Kaiserslautern, Fachbereich Phys, Kaiserslautern, Germany

[2] Univ Kaiserslautern, Forschungszentrum OPTIMAS, Kaiserslautern, Germany

[3] Univ Padjadjaran, Dept Geophys, Jatinangor, Sumedang, Indonesia

[4] Univ Nacl Cuyo, CONICET, Mendoza, Argentina

[5] Univ Nacl Cuyo, Fac Ciencias Exactas & Nat, Mendoza, Argentina

来源：

GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 21期

关键词：

water; ice; granular collisions; molecular dynamics; nanoparticles; PROTOPLANETARY DISKS; SUPERCOOLED WATER; DUST PARTICLES; ENERGY; DYNAMICS; GROWTH;

D O I：

10.1002/2017GL075395

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Collisions between ice grains are ubiquitous in the outer solar system. The mechanics of such collisions is traditionally described by the elastic contact theory of adhesive spheres. Here we use molecular dynamics simulations to study collisions between nanometer-sized amorphous water ice grains. We demonstrate that the collision-induced heating leads to grain melting in the interface of the colliding grains. The large lateral deformations and grain sticking induced considerably modify available macroscopic collision models. We report on systematic increases of the contact radius, strong grain deformations, and the prevention of grain bouncing.

引用

页码：10822 / 10828

页数：7

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