Aerosol Dynamics

Lazaridis, Mihalis; Drossinos, Yannis

doi:10.1002/9781118682555.ch2

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…Collisions of particles (also termed 'grains') play an important role in several branches of science. In environmental physics, the size distribution of aerosols is influenced by their collision dynamics 1,2 . In chemical engineering, powder technology is based on the manipulation of grains; again, the collisional interaction of grains may influence their size and properties 3 .…”

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Bouncing and spinning of amorphous Lennard-Jones nanoparticles under oblique collisions

Nietiadi

Urbassek

2022

Sci Rep

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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.

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Bouncing and spinning of amorphous Lennard-Jones nanoparticles under oblique collisions

Nietiadi

Urbassek

2022

Sci Rep

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“…Introduction to Aerosol Characterization products of the gas-phase reactions of unsaturated hydrocarbons with atmospheric oxidants reach supersaturation and condense onto existing particles. Pressure difference between the ambient vapor pressure and the vapor pressure on the surface of the particle determines the direction of the net vapor flux (Lazaridis and Drossinos, 2013). The process opposite to condensational growth is evaporation.…”

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Estimation of emission rates and lung dose from various simulated indoor workplace related aerosol sources

Serfozo¹,

Σερφόζο²

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Η παρούσα διδακτορική διατριβή εξετάζει τις εκπομπές αιωρούμενων σωματιδίων από διάφορες πηγές που συναντούνται στο εργασιακό περιβάλλον. Σημαντική αύξηση της αριθμητικής συγκέντρωσης και μάζας σωματιδίων οδηγεί σε αύξηση της ανθρώπινης έκθεσης και δόσης. Επομένως η προστασία του ανθρώπινου πληθυσμού από την έκθεση αιωρούμενων σωματιδίων αποτελεί σημαντικό τμήμα της παρούσας επιστημονικής εργασίας.

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Dynamic condensates in aggregation processes with mass injection

Das,

Barma

2023

Indian J Phys

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Aerosol Dynamics

Cited by 3 publications

References 26 publications

Bouncing and spinning of amorphous Lennard-Jones nanoparticles under oblique collisions

Bouncing and spinning of amorphous Lennard-Jones nanoparticles under oblique collisions

Estimation of emission rates and lung dose from various simulated indoor workplace related aerosol sources

Dynamic condensates in aggregation processes with mass injection

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