A Brownian dynamics simulation to predict morphology of nanoparticle deposits in the presence of interparticle interactions

Pramod Kulkarni, Pratim Biswas

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Nanoparticles synthesized in high temperature reactors provide a viable method for depositing nanostructured coatings. The morphology of the deposit is an important factor in many applications and cannot be predicted by continuum models. Computer simulation of nanoparticle deposition is used to relate operational conditions to the resulting morphology. Brownian dynamic simulation of nanoparticle deposition, accounting for the interparticle van der Waals and Coulomb interactions, is carried out. Influence of van der Waals interactions, gas temperature, and thermophoretic and electrophoretic interactions on deposit morphology is investigated. Fractal dimension, packing density, and coordination number and contact angle distribution for the nanoparticle deposits are reported. Results show that by suitably controlling the external electrical field, deposits with fractal dimensions ranging from 2.2 to 2.8 and packing density varying from 2 to 13% can be obtained.

Original languageEnglish (US)
Pages (from-to)541-554
Number of pages14
JournalAerosol Science and Technology
Volume38
Issue number6
DOIs
StatePublished - Jun 2004
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

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