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Structure & dynamics of fractal-like particles made by agglomeration and sintering
  • Maximilian Eggersdorfer,
  • Eirini Goudeli
Maximilian Eggersdorfer
Novartis AG

Corresponding Author:[email protected]

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Eirini Goudeli
The University of Melbourne
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The growth of silica nanoparticles by agglomeration and viscous flow sintering is studied from free molecular to transition regime at high temperatures by discrete element method simulations. The effect of temperature on the aggregate mobility and gyration radii, particle morphology and collision frequency function is elucidated as function of the number of primary particles. The ratio between the characteristic sintering time and characteristic collision time controls the particle size and structure, quantified by the mass fractal dimension. The effect of this ratio of characteristic times on aggregate morphology is illustrated at various temperatures. Finally, when sintering is negligible, the overall collision frequency is 90% larger than that predicted by the classic Fuchs collision kernel for monodisperse agglomerates in the near free molecular and transition regime. For comparable coagulation and sintering rates, where aggregates with sinter bonds are formed, the overall collision frequency increases an enhancement of <90% is observed.
23 Jun 2020Submitted to AIChE Journal
23 Jun 2020Submission Checks Completed
23 Jun 2020Assigned to Editor
28 Jun 2020Reviewer(s) Assigned
10 Aug 2020Editorial Decision: Revise Minor
15 Sep 20201st Revision Received
16 Sep 2020Submission Checks Completed
16 Sep 2020Assigned to Editor
22 Sep 2020Reviewer(s) Assigned
26 Sep 2020Editorial Decision: Revise Minor
04 Oct 20202nd Revision Received
07 Oct 2020Submission Checks Completed
07 Oct 2020Assigned to Editor
07 Oct 2020Editorial Decision: Accept
31 Oct 2020Published in AIChE Journal. 10.1002/aic.17099