Arabian Journal for Science and Engineering

, Volume 43, Issue 10, pp 5551–5558 | Cite as

Reynolds stress modeling of flow characteristics in a vegetated rectangular open channel

  • Naveed Anjum
  • Usman Ghani
  • Ghufran Ahmed Pasha
  • Muhammad Usman Rashid
  • Abid Latif
  • M. Zubair Yousaf Rana
Research Article - Civil Engineering


A computational technique to simulate turbulent and vegetated flow in a rectangular open channel was investigated. Reynolds stress model was implemented to the circular vegetation patch flow configuration for the investigation of flow properties and turbulence characteristics. A finite volume-based model was developed using a three-dimensional (3-D) numerical code FLUENT and the pre-processor Geometry and Mesh Building Intelligent Toolkit. The model was first validated and then used for simulation purpose. Vertical distribution of mean stream-wise velocities was computed at typical locations. A deceleration in the magnitude of stream-wise velocities was observed within the vegetation patch zone. Minimum values of velocity magnitude were observed directly behind the vegetation structures. Turbulence characteristics in the form of Reynolds stresses and turbulent kinetic energies investigated by this model showed that turbulence was greater in the regions of vegetation patch. This Reynolds stress modeling formulation has shown to be capable of capturing important mean flow and turbulence characteristics in the configuration considered.


Turbulent flow Reynolds stress model Numerical simulation Open channel Vegetated domain 

List of symbols


Velocity component in i direction;


Velocity component in j direction;

\(\rho \)

Density of water;



\(\mu \)

Dynamic viscosity;

\({\rho u}_{i}u_{j}\)

Reynolds stresses


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The authors are thankful to Higher Education Commission, Pakistan, for providing CFD facilities at University of Engineering & Technology, Taxila, Pakistan, which were utilized to conduct this research work.


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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  • Naveed Anjum
    • 1
  • Usman Ghani
    • 1
  • Ghufran Ahmed Pasha
    • 1
  • Muhammad Usman Rashid
    • 2
  • Abid Latif
    • 3
  • M. Zubair Yousaf Rana
    • 1
  1. 1.Department of Civil EngineeringUniversity of Engineering and TechnologyTaxilaPakistan
  2. 2.Department of Civil EngineeringUniversity of Management and TechnologyLahorePakistan
  3. 3.Department of Civil EngineeringUniversity College of Engineering BZUMultanPakistan

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