Direct Numerical Simulations (DNS) of unsteady turbulent flows in a channel accelerating uniformly from steady state are performed to study turbulence behaviour near the wall. Several steady flow simulations at various Reynolds numbers are carried out to facilitate direct comparisons between steady and unsteady behavior. It is shown that the behavior of turbulence for the streamwise velocity component in the near wall region is distinctly different from that in the core region. Moreover, the three components of the turbulent fluctuations exhibit very different characteristics reflecting the anisotropic behaviour of turbulence.
|Title of host publication||40th AIAA Fluid Dynamics Conference|
|Publisher||American Institute of Aeronautics and Astronautics|
|Publication status||Published - 2010|
|Event||40th AIAA Fluid Dynamics Conference - Chicago, United States|
Duration: 28 Jun 2010 → 1 Jul 2010
|Conference||40th AIAA Fluid Dynamics Conference|
|Period||28/06/10 → 1/07/10|
Seddighi, M., He, S., Vardy, A. E., & Orlandi, P. (2010). Near wall behavior of turbulence in an unsteady channel flow. In 40th AIAA Fluid Dynamics Conference American Institute of Aeronautics and Astronautics.