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THE SPEED OF TURBULENT-LAMINAR FRONTS IN PIPE FLOW

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The speeds of turbulent-laminar interfaces in pipe flow are studied theoretically, and through numerical simulations of the Navier-Stokes equations and laboratory experiments. A particular focus is the continuous, but non-smooth transition from localized puffs to expanding slugs. Different interfaces within the slug regime are discussed.

Author(s):

Dwight Barkley    
University of Warwick
United Kingdom

Marc Avila    
Friedrich-Alexander-Universität
Germany

Björn Hof    
Max Planck Institute for Dynamics and Self-Organization
Germany