Modification of the damping function in the k-ε model to analyse oscillatory boundary layers

Ahmad Sana; Abdul Razzaq Ghumman; Hitoshi Tanaka

doi:10.1016/j.oceaneng.2005.11.018

Modification of the damping function in the k-ε model to analyse oscillatory boundary layers

Ahmad Sana^*, Abdul Razzaq Ghumman, Hitoshi Tanaka

^*Corresponding author for this work

Civil and Architectural Engineering

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

11 Citations (Scopus)

Abstract

A simple relationship has been developed between the wall coordinate y⁺ and Kolmogorov's length scale using direct numerical simulation (DNS) data for a steady boundary layer. This relationship is then utilized to modify two popular versions of low Reynolds number k-ε model. The modified models are used to analyse a transitional oscillatory boundary layer. A detailed comparison has been made by virtue of velocity profile, turbulent kinetic energy, Reynolds stress and wall shear stress with the available DNS data. It is observed that the low Reynolds number models used in the present study can predict the boundary layer properties in an excellent manner.

Original language	English
Pages (from-to)	320-326
Number of pages	7
Journal	Ocean Engineering
Volume	34
Issue number	2
DOIs	https://doi.org/10.1016/j.oceaneng.2005.11.018
Publication status	Published - Feb 2007

Keywords

Oscillatory boundary layer
Shear stress
Turbulence model
k-ε model

ASJC Scopus subject areas

Environmental Engineering
Ocean Engineering

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10.1016/j.oceaneng.2005.11.018

Cite this

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title = "Modification of the damping function in the k-ε model to analyse oscillatory boundary layers",

abstract = "A simple relationship has been developed between the wall coordinate y+ and Kolmogorov's length scale using direct numerical simulation (DNS) data for a steady boundary layer. This relationship is then utilized to modify two popular versions of low Reynolds number k-ε model. The modified models are used to analyse a transitional oscillatory boundary layer. A detailed comparison has been made by virtue of velocity profile, turbulent kinetic energy, Reynolds stress and wall shear stress with the available DNS data. It is observed that the low Reynolds number models used in the present study can predict the boundary layer properties in an excellent manner.",

keywords = "Oscillatory boundary layer, Shear stress, Turbulence model, k-ε model",

author = "Ahmad Sana and Ghumman, {Abdul Razzaq} and Hitoshi Tanaka",

note = "Funding Information: A part of this study was completed when the first author was on research leave from Sultan Qaboos University, Sultanate of Oman to conduct research at The University of Engineering and Technology, Taxila, Pakistan as a Short-term Foreign Faculty supported by Higher Education Commission of Pakistan. The first author is grateful to these organizations for their support. ",

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doi = "10.1016/j.oceaneng.2005.11.018",

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volume = "34",

pages = "320--326",

journal = "Ocean Engineering",

issn = "0029-8018",

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T1 - Modification of the damping function in the k-ε model to analyse oscillatory boundary layers

AU - Sana, Ahmad

AU - Ghumman, Abdul Razzaq

AU - Tanaka, Hitoshi

N1 - Funding Information: A part of this study was completed when the first author was on research leave from Sultan Qaboos University, Sultanate of Oman to conduct research at The University of Engineering and Technology, Taxila, Pakistan as a Short-term Foreign Faculty supported by Higher Education Commission of Pakistan. The first author is grateful to these organizations for their support.

PY - 2007/2

Y1 - 2007/2

N2 - A simple relationship has been developed between the wall coordinate y+ and Kolmogorov's length scale using direct numerical simulation (DNS) data for a steady boundary layer. This relationship is then utilized to modify two popular versions of low Reynolds number k-ε model. The modified models are used to analyse a transitional oscillatory boundary layer. A detailed comparison has been made by virtue of velocity profile, turbulent kinetic energy, Reynolds stress and wall shear stress with the available DNS data. It is observed that the low Reynolds number models used in the present study can predict the boundary layer properties in an excellent manner.

AB - A simple relationship has been developed between the wall coordinate y+ and Kolmogorov's length scale using direct numerical simulation (DNS) data for a steady boundary layer. This relationship is then utilized to modify two popular versions of low Reynolds number k-ε model. The modified models are used to analyse a transitional oscillatory boundary layer. A detailed comparison has been made by virtue of velocity profile, turbulent kinetic energy, Reynolds stress and wall shear stress with the available DNS data. It is observed that the low Reynolds number models used in the present study can predict the boundary layer properties in an excellent manner.

KW - Oscillatory boundary layer

KW - Shear stress

KW - Turbulence model

KW - k-ε model

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DO - 10.1016/j.oceaneng.2005.11.018

M3 - Article

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SN - 0029-8018

VL - 34

SP - 320

EP - 326

JO - Ocean Engineering

JF - Ocean Engineering

IS - 2

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Modification of the damping function in the k-ε model to analyse oscillatory boundary layers

Abstract

Keywords

ASJC Scopus subject areas

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