Turbulence and Internal Waves in a Stably-Stratified Channel Flow

  • Manuel García-Villalba
  • Juan C. del Álamo
Conference paper

Summary

Direct numerical simulations (DNS) of stably-stratified, turbulent channel flow at moderate Reynolds number are currently being performed on the XC-4000. A wide range of stratification levels is being considered and large computational boxes are being employed to study carefully the effects of stratification on the wall turbulence. First and second order statistics are discussed. The characteristics of the flow are elucidated using instantaneous snapshots of velocity and density fluctuations. It is shown that, for high stratification levels, the flow remains turbulent close to the walls while internal gravity waves dominate the core of the channel.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Manuel García-Villalba
    • 1
  • Juan C. del Álamo
    • 2
  1. 1.Institut für HydromechanikUniversität KarlsruheGermany
  2. 2.Department of Mechanical and Aerospace EngineeringUniversity of CaliforniaSan Diego

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