Drag Reduction by Bubble Oscillations

Abstract

Drag reduction in stationary turbulent flows by bubbles is sensitive to the dynamics of bubble oscillations. Without this dynamical effect the bubbles only renormalize the fluid density and viscosity, an effect that by itself can only lead to a small percentage of drag reduction. We show in this paper that the dynamics of bubbles and their effect on the compressibility of the mixture can lead to a much higher drag reduction.

7 pages, 1 figure, submitted to Phys. Rev. E

References in corpus (6)

• Drag Reduction by Polymers in Wall Bounded Turbulence
• Drag Reduction by a Linear Viscosity Profile
• Drag Reduction by Microbubbles in Turbulent Flows: the Limit of Minute Bubbles
• The Polymer Stress Tensor in Turbulent Shear Flows
• Additive Equivalence in Turbulent Drag Reduction by Flexible and Rodlike Polymers
• Saturation of Turbulent Drag Reduction in Dilute Polymer Solutions

Cited by in corpus (6)

• Colloquium: Theory of Drag Reduction by Polymers in Wall Bounded Turbulence
• The importance of bubble deformability for strong drag reduction in bubbly turbulent Taylor-Couette flow
• Microbubbly drag reduction in Taylor-Couette flow in the wavy vortex regime
• The State of the Art in Hydrodynamic Turbulence: Past Successes and Future Challenges
• When sound slows down bubbles
• Sodium chloride inhibits effective bubbly drag reduction in turbulent bubbly Taylor-Couette flows