68th Annual Meeting of the APS Division of Fluid Dynamics (November 22, 2015 — November 24, 2015)

V0055: Forced relaminarisation in a pipe

  • Jakob Kühnen, IST Austria
  • Philipp Maier, IST Austria
  • Björn Hof, IST Austria
DOI: https://doi.org/10.1103/APS.DFD.2015.GFM.V0055

We show that a simple modification of the velocity profile in a pipe by means of a stationary obstacle can lead to a complete collapse of turbulence and the flow fully relaminarises. In a smooth straight pipe the flow remains laminar downstream of the control. High amounts of energy (pumping power due to friction drag) can be saved if the flow is laminar instead of turbulent.

This work is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License. Any reuse must credit the author(s) and provide a link back to this page.