Fast microscale acoustic streaming driven by a temperature-gradient-induced non-dissipative acoustic body force

Abstract

We study acoustic streaming in liquids driven by a non-dissipative acoustic body force created by light-induced temperature gradients. This thermoacoustic streaming produces a velocity amplitude approximately 50 times higher than boundary-driven Rayleigh streaming and 90 times higher than Rayleigh-Benard convection at a temperature gradient of 10 K/mm in the channel. Further, Rayleigh streaming is altered by the acoustic body force at a temperature gradient of only 0.5 K/mm. The thermoacoustic streaming allows for modular flow control and enhanced heat transfer at the microscale. Our study provides the groundwork for studying microscale acoustic streaming coupled with temperature fields.

arXiv comment6 pages, 3 pdf figures, RevTex-4.1

References in corpus (14)

• Acoustic radiation- and streaming-induced microparticle velocities determined by micro-PIV in an ultrasound symmetry plane
• Ultrasound-induced acoustophoretic motion of microparticles in three dimensions
• The acoustic force density acting on inhomogeneous fluids in acoustic fields
• Acoustic streaming and its suppression in inhomogeneous fluids
• Theory of pressure acoustics with boundary layers and streaming in curved elastic cavities
• General Defocusing Particle Tracking: fundamentals and uncertainty assessment
• Characterization of Acoustic Streaming in Gradients of Density and Compressibility
• Suppression of acoustic streaming in shape-optimized channels
• Particle-size-dependent acoustophoretic motion and depletion of micro- and nanoparticles at long time scales
• Theory of pressure acoustics with thermoviscous boundary layers and streaming in elastic cavities
• Three-Dimensional Numerical Modeling of Acoustic Trapping in Glass Capillaries
• A fast and robust algorithm for General Defocusing Particle Tracking
• Acoustic Tweezing and Patterning of Concentration Fields in Microfluidics
• Strong wave-mean-flow coupling in baroclinic acoustic streaming

Cited by in corpus (2)

• The acoustic radiation force on a spherical thermoviscous particle in a thermoviscous fluid including scattering and microstreaming
• Aspect-ratio-dependent heat transport by baroclinic acoustic streaming