Simulation and Modelling of the Skew Response of Turbulent Channel Flow to Spanwise Flow Deformation

  • R. J. A. Howard
  • N. D. Sandham
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 5)


Skewed turbulent channel flow is investigated by observing the response of a steady equilibrium turbulent channel flow to pressure driven and wall shear driven spanwise deformation. The results produced by direct numerical simulation (DNS) of the incompressible Navier-Stokes equations are compared with those generated by several low Reynolds number two-equation turbulence models. The DNS confirms earlier studies, showing that the initial response of the flow to spanwise deformations is a drop in the turbulence intensity, caused by a partial breakdown of the near-wall streak structures. None of the two-equation models adequately capture this phenomenon. The DNS also shows a lag between the shear stress and strain rate angles of the flow. Standard two-equation models are unable to show this as it is assumed that the eddy viscosity is independent of flow direction. Possible improvements of the models are discussed.


Direct Numerical Simulation Turbulence Intensity Flow Angle Turbulent Channel Flow Wall Normal Distance 
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • R. J. A. Howard
    • 1
  • N. D. Sandham
    • 1
  1. 1.London University, Queen Mary and Westfield CollegeLondonUK

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