Effect of traveling wave-like wall deformation (i.e. peristalsis) in a fully developed turbulent channel flow is investigated by means of direct numerical simulation. We not only demonstrate that the friction drag is reduced by wavelike wall deformation traveling toward the downstream direction, but also show that the turbulence is completely killed (viz. the flow is re-laminarized) under some sets of parameters. It is also found that at higher amplitude of actuation the re-laminarized flow is unstable and exhibits a periodic cycle between high and low drag.
|Publication status||Published - 2011 Jan 1|
|Event||7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada|
Duration: 2011 Jul 28 → 2011 Jul 31
|Other||7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011|
|Period||11/7/28 → 11/7/31|
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes