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Relative velocities in bidisperse turbulent aerosols: Simulations and theory
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 42018 (English)In: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 98, no 6, article id 063107Article in journal (Refereed) Published
Abstract [en]

We perform direct numerical simulations of a bidisperse suspension of heavy spherical particles in forced, homogeneous, and isotropic three-dimensional turbulence. We compute the joint distribution of relative particle distances and longitudinal relative velocities between particles of different inertia. For a pair of particles with small difference in their inertias we compare our results with recent theoretical predictions [Meibohm et al., Phys. Rev. E 96, 061102 (2017)] for the shape of this distribution. We also compute the moments of relative velocities as a function of particle separation and compare with the theoretical predictions. We observe good agreement. For a pair of particles that are very different from each other-one is heavy and the other one has negligible inertia-we give a theory to calculate their root-mean-square relative velocity. This theory also agrees well with the results of our simulations.

Place, publisher, year, edition, pages
2018. Vol. 98, no 6, article id 063107
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-163681DOI: 10.1103/PhysRevE.98.063107ISI: 000452954300002OAI: oai:DiVA.org:su-163681DiVA, id: diva2:1280332
Available from: 2019-01-18 Created: 2019-01-18 Last updated: 2019-01-18Bibliographically approved

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Bhatnagar, AkshayMitra, Dhrubaditya
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