Multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data

Young Don Choi; Jong Keun Shin; Kun Ho Chun

doi:10.1007/BF03185223

Multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data

Young Don Choi, Jong Keun Shin, Kun Ho Chun

* Honorary professors

Research output: Contribution to journal › Article › peer-review

Abstract

The paper reports a multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data. The key features of the model are to satisfy the wall limiting conditions of the individual source terms in the exact dissipation rate equation using the wall damping functions. The wall damping functions are formulated in term of dimensionless dissipation length scale l⁺_D ( ≡ l_D(νε)^1/4/ν) and the invariants of small and large scale turbulence anisotropy tensors, a_ij( = u_iu_j/k - 2δ_ij/3) and e_ij( = ε_ij/ε - 2δ_ij/3). The model constants are optimized with aids of DNS data in a plane channel flow. Adopting the dissipation length scale as a parameter of damping function, the applicabilities of k-ε model are extended to the turbulent flow calculation of complex flow passages.

Original language	English
Pages (from-to)	392-402
Number of pages	11
Journal	KSME International Journal
Volume	15
Issue number	3
DOIs	https://doi.org/10.1007/BF03185223
Publication status	Published - 2001 Mar

Bibliographical note

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Keywords

DNS
Dissipation length scale
Low-Reynolds-number dissipation rate equation
Turbulence model

ASJC Scopus subject areas

Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/BF03185223

Cite this

@article{795c2ddee06a4179ba1388f6e7c84ea6,

title = "Multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data",

abstract = "The paper reports a multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data. The key features of the model are to satisfy the wall limiting conditions of the individual source terms in the exact dissipation rate equation using the wall damping functions. The wall damping functions are formulated in term of dimensionless dissipation length scale l+D ( ≡ lD(νε)1/4/ν) and the invariants of small and large scale turbulence anisotropy tensors, aij( = uiuj/k - 2δij/3) and eij( = εij/ε - 2δij/3). The model constants are optimized with aids of DNS data in a plane channel flow. Adopting the dissipation length scale as a parameter of damping function, the applicabilities of k-ε model are extended to the turbulent flow calculation of complex flow passages.",

keywords = "DNS, Dissipation length scale, Low-Reynolds-number dissipation rate equation, Turbulence model",

author = "Choi, {Young Don} and Shin, {Jong Keun} and Chun, {Kun Ho}",

year = "2001",

month = mar,

doi = "10.1007/BF03185223",

language = "English",

volume = "15",

pages = "392--402",

journal = "KSME International Journal",

issn = "1226-4865",

publisher = "Korean Society of Mechanical Engineers",

number = "3",

}

TY - JOUR

T1 - Multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data

AU - Choi, Young Don

AU - Shin, Jong Keun

AU - Chun, Kun Ho

PY - 2001/3

Y1 - 2001/3

N2 - The paper reports a multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data. The key features of the model are to satisfy the wall limiting conditions of the individual source terms in the exact dissipation rate equation using the wall damping functions. The wall damping functions are formulated in term of dimensionless dissipation length scale l+D ( ≡ lD(νε)1/4/ν) and the invariants of small and large scale turbulence anisotropy tensors, aij( = uiuj/k - 2δij/3) and eij( = εij/ε - 2δij/3). The model constants are optimized with aids of DNS data in a plane channel flow. Adopting the dissipation length scale as a parameter of damping function, the applicabilities of k-ε model are extended to the turbulent flow calculation of complex flow passages.

AB - The paper reports a multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data. The key features of the model are to satisfy the wall limiting conditions of the individual source terms in the exact dissipation rate equation using the wall damping functions. The wall damping functions are formulated in term of dimensionless dissipation length scale l+D ( ≡ lD(νε)1/4/ν) and the invariants of small and large scale turbulence anisotropy tensors, aij( = uiuj/k - 2δij/3) and eij( = εij/ε - 2δij/3). The model constants are optimized with aids of DNS data in a plane channel flow. Adopting the dissipation length scale as a parameter of damping function, the applicabilities of k-ε model are extended to the turbulent flow calculation of complex flow passages.

KW - DNS

KW - Dissipation length scale

KW - Low-Reynolds-number dissipation rate equation

KW - Turbulence model

UR - http://www.scopus.com/inward/record.url?scp=0035285908&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035285908&partnerID=8YFLogxK

U2 - 10.1007/BF03185223

DO - 10.1007/BF03185223

M3 - Article

AN - SCOPUS:0035285908

SN - 1226-4865

VL - 15

SP - 392

EP - 402

JO - KSME International Journal

JF - KSME International Journal

IS - 3

ER -

Multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this