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Relative velocities in bidisperse turbulent aerosols: Simulations and theory
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm Univ, Roslagstullsbacken 23, S-10691 Stockholm, Sweden..
Gothenburg Univ, Dept Phys, S-41296 Gothenburg, Sweden..
Gothenburg Univ, Dept Phys, S-41296 Gothenburg, Sweden..
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm Univ, Roslagstullsbacken 23, S-10691 Stockholm, Sweden..ORCID iD: 0000-0001-6162-7112
2018 (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
American Physical Society, 2018. Vol. 98, no 6, article id 063107
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-240719DOI: 10.1103/PhysRevE.98.063107ISI: 000452954300002Scopus ID: 2-s2.0-85058651212OAI: oai:DiVA.org:kth-240719DiVA, id: diva2:1276496
Funder
Knut and Alice Wallenberg Foundation, KAW 2014.0048Swedish Research Council, 2013-3992 2017-03865Swedish Research Council Formas, 2014-585
Note

QC 20190108

Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-08Bibliographically approved

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Mitra, Dhrubaditya

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