### 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_{i}u_{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 |

Publication status | Published - 2001 Mar 1 |

### Fingerprint

### Keywords

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

### ASJC Scopus subject areas

- Mechanical Engineering

### Cite this

*KSME International Journal*,

*15*(3), 392-402.

**Multiple source modeling of low-Reynolds-number dissipation rate equation with aids of DNS data.** / Choi, Young Don; Shin, Jong Keun; Chun, Kun Ho.

Research output: Contribution to journal › Article

*KSME International Journal*, vol. 15, no. 3, pp. 392-402.

}

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 - 2001/3/1

Y1 - 2001/3/1

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 - Dissipation length scale

KW - DNS

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

M3 - Article

AN - SCOPUS:0035285908

VL - 15

SP - 392

EP - 402

JO - Journal of Mechanical Science and Technology

JF - Journal of Mechanical Science and Technology

SN - 1738-494X

IS - 3

ER -