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• W4283313241 abstract "Collisions of Lennard-Jones nanoparticles (NPs) may be used to study the generic collision behavior of NPs. We study the collision dynamics of amorphous NPs for oblique collisions using molecular dynamics simulation as a function of collision velocity and impact parameter. In order to allow for NP bouncing, the attraction between atoms originating from differing NPs is reduced. For near-central collisions, a finite region of velocities - a 'bouncing window' - exists where the 2 NPs bounce from each other. At smaller velocities, energy dissipation and - at larger velocities - also NP deformation do not allow the NPs to surpass the attractive forces such that they stick to each other. Oblique collisions of non-rotating NPs convert angular momentum into NP spin. For low velocities, the NP spin is well described by assuming the NPs to come momentarily to a complete stop at the contact point ('grip'), such that orbital and spin angular momentum share the pre-collision angular momentum in a ratio of 5:2. The normal coefficient of restitution increases with impact parameter for small velocities, but changes sign for larger velocities where the 2 NPs do not repel but their motion direction persists. The tangential coefficient of restitution is fixed in the 'grip' regime to a value of 5/7, but increases towards 1 for high-velocity collisions at not too small impact parameters, where the 2 NPs slide along each other." @default.
• W4283313241 created "2022-06-24" @default.
• W4283313241 creator A5010458638 @default.
• W4283313241 creator A5087339575 @default.
• W4283313241 date "2022-06-23" @default.
• W4283313241 modified "2023-10-14" @default.
• W4283313241 title "Bouncing and spinning of amorphous Lennard-Jones nanoparticles under oblique collisions" @default.
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• W4283313241 doi "https://doi.org/10.1038/s41598-022-14754-1" @default.
• W4283313241 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35739170" @default.
• W4283313241 hasPublicationYear "2022" @default.
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