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Meeting Materials Science & Technology 2019
Symposium Materials vs Minerals: Bridging the Gap between Materials Science and Earth and Planetary Science
Presentation Title Atomistic Insights into Grain Collision Dynamics in the Solar Nebula
Author(s) Benjamin Geller, Steven Baro, Krishna Muralidharan
On-Site Speaker (Planned) Steven Baro
Abstract Scope Mineral-grain collisions underlie the accretion of inner-solar system planets, while ice-grain collisions is ubiquitous in the outer solar system. Significant modeling efforts have been undertaken to understand collision dynamics of both mineral and ice grains at the pebble (i.e. cm) and larger spatial scales, but not much information is available at the smaller spatial scales (i.e nm-μm). Towards this end, we use classical molecular dynamics simulations to study the collisions of nanometric (i) silicate grains, (ii) ice grains, and (iii) ice-covered silicate grains. In particular, we examine the extent of grain-coalescence vs grain fragmentation, as well as the extent of volatilization of adsorbed ice (on silicate grains) as a function of relative grain velocity, grain size, and ambient temperature. In addition, a Johnson-Kendall-Roberts model based analysis of the coefficient of restitution and the bouncing velocity is provided in conjunction with atomic-scale characterization of the underlying collision dynamics.


Atomistic Insights into Grain Collision Dynamics in the Solar Nebula
Combining the Tools of Atomic-scale Characterization with Density-functional Theory and Thermodynamic Modeling to Unravel the Origins of the First Solar-system Solids
Deciphering the Energy Landscapes of Solvated Interfaces: An Integrative Approach of Experimental Thermodynamics and Computational Chemistry
Molecules, Nanoclusters and Materials in the Extreme Environment of Interstellar Space
Surface Structure and Energetics at the Salt-Brine Interface
Synthesis and Characterization of Ceramic Foams from Earth Abundant Materials
Thermodynamics of (111) Twin Complexions in Spinel: A First-principles Study
Transmission Electron Microscopy of Refractory Minerals from Primitive Chondritic Meteorites
Unraveling the Mechanisms of Pore Space Cementation in Quartz Sandstone: A 3D Phase-field Approach

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