A Lagrangian approach to the interface velocity of turbulent puffs in pipe flow

M. Holzner, M. Avila, A. De Lózar, B. Hof, in:, IOP Publishing Ltd., 2011.

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Series Title
Journal of Physics: Conference Series
Abstract
Turbulent puffs in pipe flow are characterized by a sharp laminar-turbulent interface at the trailing edge and a more diffused leading interface. It is known that these laminar-turbulent interfaces propagate at a speed that is approximately equal to the flow rate. Our results from direct numerical simulation show that, locally, the interface velocity relative to the fluid (i) counteracts the advection due to the laminar velocity profile so that the puff can preserve its characteristic overall shape, (ii) is very small in magnitude, but involves a large interface area so that the global propagation velocity relative to the mean flow can be large and (iii) is determined by both inertial and viscous effects. The analysis provides some new insights into the mechanisms that sustain or expand localized turbulence and might be relevant for the design of new control strategies.
Publishing Year
Date Published
2011-09-01
Volume
318
Issue
5
Conference
ETC13: European Turbulence Conference
IST-REx-ID

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Holzner M, Avila M, De Lózar A, Hof B. A Lagrangian approach to the interface velocity of turbulent puffs in pipe flow. In: Vol 318. IOP Publishing Ltd.; 2011. doi:10.1088/1742-6596/318/5/052031
Holzner, M., Avila, M., De Lózar, A., & Hof, B. (2011). A Lagrangian approach to the interface velocity of turbulent puffs in pipe flow (Vol. 318). Presented at the ETC13: European Turbulence Conference, IOP Publishing Ltd. https://doi.org/10.1088/1742-6596/318/5/052031
Holzner, Markus, Marc Avila, Alberto De Lózar, and Björn Hof. “A Lagrangian Approach to the Interface Velocity of Turbulent Puffs in Pipe Flow,” Vol. 318. IOP Publishing Ltd., 2011. https://doi.org/10.1088/1742-6596/318/5/052031.
M. Holzner, M. Avila, A. De Lózar, and B. Hof, “A Lagrangian approach to the interface velocity of turbulent puffs in pipe flow,” presented at the ETC13: European Turbulence Conference, 2011, vol. 318, no. 5.
Holzner M, Avila M, De Lózar A, Hof B. 2011. A Lagrangian approach to the interface velocity of turbulent puffs in pipe flow. ETC13: European Turbulence Conference, Journal of Physics: Conference Series, vol. 318.
Holzner, Markus, et al. A Lagrangian Approach to the Interface Velocity of Turbulent Puffs in Pipe Flow. Vol. 318, no. 5, IOP Publishing Ltd., 2011, doi:10.1088/1742-6596/318/5/052031.

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