Modification of the K-ε turbulence model for in-cylinder gas flow

Hiroyuki Kido, Kenshiro Nakashima, Hiroshi Tajima, Toshiaki Kitagawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A modification of the values of three constants C1, C2 and C3 in the standard K-ε turbulence model is proposed, based on the empirical law of decay obtained for nearly homogeneous in-cylinder turbulence. Since the decay exponent of Reynolds numbers for in-cylinder turbulence is found to be different from that for steady ducted flow just behind a turbulence-generating grid, the C2 value is modified first, followed by the C1 and C3 values, which depend on the C2 value. The derived C2 value of 1.40 is smaller than that in the standard K-ε turbulence model, but the C1 value, 1.40 is close to that of the standard one. The C3 value, -1.05, is very close to the recommended value by Morel et al. for the case of a unidirectional axial compression.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Volume32
Issue number1
Publication statusPublished - Feb 1989

Fingerprint

turbulence models
Turbulence models
gas flow
Flow of gases
Turbulence
turbulence
ducted flow
Axial compression
decay
Reynolds number
grids
exponents

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry

Cite this

Modification of the K-ε turbulence model for in-cylinder gas flow. / Kido, Hiroyuki; Nakashima, Kenshiro; Tajima, Hiroshi; Kitagawa, Toshiaki.

In: JSME International Journal, Series B: Fluids and Thermal Engineering, Vol. 32, No. 1, 02.1989, p. 85-90.

Research output: Contribution to journalArticle

@article{8b7c9c5338b34c5ba46e13dd595fd65e,
title = "Modification of the K-ε turbulence model for in-cylinder gas flow",
abstract = "A modification of the values of three constants C1, C2 and C3 in the standard K-ε turbulence model is proposed, based on the empirical law of decay obtained for nearly homogeneous in-cylinder turbulence. Since the decay exponent of Reynolds numbers for in-cylinder turbulence is found to be different from that for steady ducted flow just behind a turbulence-generating grid, the C2 value is modified first, followed by the C1 and C3 values, which depend on the C2 value. The derived C2 value of 1.40 is smaller than that in the standard K-ε turbulence model, but the C1 value, 1.40 is close to that of the standard one. The C3 value, -1.05, is very close to the recommended value by Morel et al. for the case of a unidirectional axial compression.",
author = "Hiroyuki Kido and Kenshiro Nakashima and Hiroshi Tajima and Toshiaki Kitagawa",
year = "1989",
month = "2",
language = "English",
volume = "32",
pages = "85--90",
journal = "JSME International Journal, Series B: Fluids and Thermal Engineering",
issn = "1340-8054",
publisher = "Japan Society of Mechanical Engineers",
number = "1",

}

TY - JOUR

T1 - Modification of the K-ε turbulence model for in-cylinder gas flow

AU - Kido, Hiroyuki

AU - Nakashima, Kenshiro

AU - Tajima, Hiroshi

AU - Kitagawa, Toshiaki

PY - 1989/2

Y1 - 1989/2

N2 - A modification of the values of three constants C1, C2 and C3 in the standard K-ε turbulence model is proposed, based on the empirical law of decay obtained for nearly homogeneous in-cylinder turbulence. Since the decay exponent of Reynolds numbers for in-cylinder turbulence is found to be different from that for steady ducted flow just behind a turbulence-generating grid, the C2 value is modified first, followed by the C1 and C3 values, which depend on the C2 value. The derived C2 value of 1.40 is smaller than that in the standard K-ε turbulence model, but the C1 value, 1.40 is close to that of the standard one. The C3 value, -1.05, is very close to the recommended value by Morel et al. for the case of a unidirectional axial compression.

AB - A modification of the values of three constants C1, C2 and C3 in the standard K-ε turbulence model is proposed, based on the empirical law of decay obtained for nearly homogeneous in-cylinder turbulence. Since the decay exponent of Reynolds numbers for in-cylinder turbulence is found to be different from that for steady ducted flow just behind a turbulence-generating grid, the C2 value is modified first, followed by the C1 and C3 values, which depend on the C2 value. The derived C2 value of 1.40 is smaller than that in the standard K-ε turbulence model, but the C1 value, 1.40 is close to that of the standard one. The C3 value, -1.05, is very close to the recommended value by Morel et al. for the case of a unidirectional axial compression.

UR - http://www.scopus.com/inward/record.url?scp=0024606063&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024606063&partnerID=8YFLogxK

M3 - Article

VL - 32

SP - 85

EP - 90

JO - JSME International Journal, Series B: Fluids and Thermal Engineering

JF - JSME International Journal, Series B: Fluids and Thermal Engineering

SN - 1340-8054

IS - 1

ER -