Modeling of a rough-wall oscillatory boundary layer using two-equation turbulence models

Ahmad Sana, Abdul Razzaq Ghumman, Hitoshi Tanaka

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The standard k-ω turbulence model and two versions of blended k-ω/k-ε models have been used to study the characteristics of a one-dimensional oscillatory boundary layer on a rough surface. The wall boundary condition for the specific dissipation rate of turbulent kinetic energy at the wall is specified in terms of a function based on wall roughness. A detailed comparison has been made for mean velocity, turbulent kinetic energy, Reynolds stress, and wall shear stress with the available experimental data. The three models predict the above properties reasonably well. In particular, the prediction of turbulent kinetic energy for the rough case by the blended models is much better than that for smooth oscillatory boundary layers as reported in previous studies. As a result of the present study, the use of one of the blended models in calculating the sediment transport in coastal environments may be recommended.

Original languageEnglish
Pages (from-to)60-65
Number of pages6
JournalJournal of Hydraulic Engineering
Volume135
Issue number1
DOIs
Publication statusPublished - 2009

Fingerprint

Turbulence models
Boundary layers
boundary layer
turbulence
Kinetic energy
kinetic energy
modeling
Sediment transport
Shear stress
Surface roughness
Boundary conditions
shear stress
roughness
sediment transport
coastal zone
dissipation
boundary condition
prediction

Keywords

  • Boundary layers
  • Coastal environment
  • Oscillatory flow
  • Shear stress
  • Turbulence
  • Velocity

ASJC Scopus subject areas

  • Water Science and Technology
  • Civil and Structural Engineering
  • Mechanical Engineering

Cite this

Modeling of a rough-wall oscillatory boundary layer using two-equation turbulence models. / Sana, Ahmad; Ghumman, Abdul Razzaq; Tanaka, Hitoshi.

In: Journal of Hydraulic Engineering, Vol. 135, No. 1, 2009, p. 60-65.

Research output: Contribution to journalArticle

Sana, Ahmad ; Ghumman, Abdul Razzaq ; Tanaka, Hitoshi. / Modeling of a rough-wall oscillatory boundary layer using two-equation turbulence models. In: Journal of Hydraulic Engineering. 2009 ; Vol. 135, No. 1. pp. 60-65.
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