Numerical simulation of deformation and fragmentation of fractal-like nanoaggregates

• Autorzy: Żywczyk Łukasz , Moskal Arkadiusz , Przekop Rafał

Identyfikatory

DOI

10.24425/cpe.2019.130213

• Języki publikacji: EN

Abstrakty

EN

Aflexible fractal-like aggregate modelwas used to study deformation and fragmentation of the structure of fractal-like aggregates via their impaction with rigid rough surface.Aggregateswere conveyed one at the time towards a surface under vacuum conditions. The number of primary particles remaining in each fragment, ratio of average fragment radius of gyration after impaction to the average fragment initial radius of gyration and ratio of average coordination number to the initial coordination number were monitored for each individual aggregate. Results demonstrate that depending on the impact velocity, the fractal dimension of the aggregate, the strength of bonds between primary particles, the stiffness of the aggregate structure and the diameter of primary particle composing an aggregate, restructuring or breakage of the aggregate occur. Moreover, in the analysis of the ratio of coordination number of aggregates after impaction to the initial coordination number, three regimes were distinguished: first no deformation at low impact velocities, second restructurisation regime and finally fragmentation regime where partial or total fragmentation of aggregates was observed.

Słowa kluczowe

EN

fractal-like aggregate; discrete element modelling; fragmentation; restructuration

PL

agregat fraktalny; modelowanie elementów dyskretnych; podział; restrukturyzacja

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2019
• Tom: Vol. 40, nr 4
• Strony: 377–--397
• Opis fizyczny: Bibliogr. 45 poz., rys., tab.

Twórcy

autor

Żywczyk Łukasz

• Polish Academy of Sciences, Institute of Fundamental Technological Research, ul. Pawińskiego 5B, 02-106 Warsaw, Poland

autor

Moskal Arkadiusz

• Warsaw University of Technology, Faculty of Chemical and Process Engineering, ul. Waryńskiego 1, 00-645 Warsaw, Poland

autor

Przekop Rafał

• Warsaw University of Technology, Faculty of Chemical and Process Engineering, ul. Waryńskiego 1, 00-645 Warsaw, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).