Relationships between small-scale fluid motions and inertial particle clustering in turbulence

Yoshiki Sakurai, Takashi Ishihara

Research output: Contribution to journalArticle

Abstract

To quantitatively study the relationships between small-scale fluid motions and inertial particle clustering in turbulence, we track inertial particles in a turbulent flow through a direct numerical simulation of the forced incompressible Navier–Stokes equations. Further, we investigate the particle distribution in the eigenframe of the rate-of-strain tensor of the turbulent velocity field. The unconditional averages of the particle densities in the eigenframe demonstrate that the particle distribution exhibits specific patterns. In addition, the conditional averages in high-vorticity regions show that a strong vortex anisotropically generates low- and high-number-density regions depending on particle inertia.

Original languageEnglish
Pages (from-to)934011-934014
Number of pages4
JournalJournal of the Physical Society of Japan
Volume87
Issue number9
DOIs
Publication statusPublished - Jan 1 2018

Fingerprint

turbulence
fluids
direct numerical simulation
inertia
turbulent flow
vorticity
velocity distribution
tensors
vortices

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Relationships between small-scale fluid motions and inertial particle clustering in turbulence. / Sakurai, Yoshiki; Ishihara, Takashi.

In: Journal of the Physical Society of Japan, Vol. 87, No. 9, 01.01.2018, p. 934011-934014.

Research output: Contribution to journalArticle

@article{341a3ab8e4734c0bb13ea0353147c847,
title = "Relationships between small-scale fluid motions and inertial particle clustering in turbulence",
abstract = "To quantitatively study the relationships between small-scale fluid motions and inertial particle clustering in turbulence, we track inertial particles in a turbulent flow through a direct numerical simulation of the forced incompressible Navier–Stokes equations. Further, we investigate the particle distribution in the eigenframe of the rate-of-strain tensor of the turbulent velocity field. The unconditional averages of the particle densities in the eigenframe demonstrate that the particle distribution exhibits specific patterns. In addition, the conditional averages in high-vorticity regions show that a strong vortex anisotropically generates low- and high-number-density regions depending on particle inertia.",
author = "Yoshiki Sakurai and Takashi Ishihara",
year = "2018",
month = "1",
day = "1",
doi = "10.7566/JPSJ.87.093401",
language = "English",
volume = "87",
pages = "934011--934014",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "9",

}

TY - JOUR

T1 - Relationships between small-scale fluid motions and inertial particle clustering in turbulence

AU - Sakurai, Yoshiki

AU - Ishihara, Takashi

PY - 2018/1/1

Y1 - 2018/1/1

N2 - To quantitatively study the relationships between small-scale fluid motions and inertial particle clustering in turbulence, we track inertial particles in a turbulent flow through a direct numerical simulation of the forced incompressible Navier–Stokes equations. Further, we investigate the particle distribution in the eigenframe of the rate-of-strain tensor of the turbulent velocity field. The unconditional averages of the particle densities in the eigenframe demonstrate that the particle distribution exhibits specific patterns. In addition, the conditional averages in high-vorticity regions show that a strong vortex anisotropically generates low- and high-number-density regions depending on particle inertia.

AB - To quantitatively study the relationships between small-scale fluid motions and inertial particle clustering in turbulence, we track inertial particles in a turbulent flow through a direct numerical simulation of the forced incompressible Navier–Stokes equations. Further, we investigate the particle distribution in the eigenframe of the rate-of-strain tensor of the turbulent velocity field. The unconditional averages of the particle densities in the eigenframe demonstrate that the particle distribution exhibits specific patterns. In addition, the conditional averages in high-vorticity regions show that a strong vortex anisotropically generates low- and high-number-density regions depending on particle inertia.

UR - http://www.scopus.com/inward/record.url?scp=85052740236&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85052740236&partnerID=8YFLogxK

U2 - 10.7566/JPSJ.87.093401

DO - 10.7566/JPSJ.87.093401

M3 - Article

AN - SCOPUS:85052740236

VL - 87

SP - 934011

EP - 934014

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 9

ER -