Investigations of droplet movement excited by Lamb waves on a non-piezoelectric substrate

A model for the numerical simulation of the movement of liquid droplets excited by Lamb waves propagating on non-piezoelectric substrates was developed, and the results of simulation calculations based on this model were compared with experimental observations. In the experiments antisymmetrical zero order Lamb waves with 1 MHz center frequency were excited on a 1 mm thick glass substrate by piezoelectric single phase transducers, which caused the propulsion of microliter water droplets. The acoustic streaming within the droplet was calculated by solving the incompressible Navier-Stokes equations with an inhomogeneous acoustic streaming force field. These calculations were validated by optical measurements of the streaming effects in the droplet and by measurements of the displacement amplitudes of the Lamb waves with a laser-Doppler-vibrometer. Another part of the numerical simulations was related to the transient motion of acoustically driven droplets by solving the incompressible Navier-Stokes equation...

[1]  Roger T. Howe,et al.  Fluid motion produced by ultrasonic Lamb waves , 1990, IEEE Symposium on Ultrasonics.

[2]  L. Tobiska,et al.  FINITE ELEMENT SIMULATION OF A DROPLET IMPINGING A HORIZONTAL SURFACE , 2005 .

[3]  Achim Wixforth,et al.  Acoustically driven planar microfluidics , 2003 .

[4]  Stefan Cular,et al.  Flow induced by acoustic streaming on surface-acoustic-wave devices and its application in biofouling removal: a computational study and comparisons to experiment. , 2008, Physical review. E, Statistical, nonlinear, and soft matter physics.

[5]  Leslie Y Yeo,et al.  Ultrafast microfluidics using surface acoustic waves. , 2009, Biomicrofluidics.

[6]  Jun Kondoh,et al.  Study of Surface Acoustic Wave Streaming Phenomenon Based on Temperature Measurement and Observation of Streaming in Liquids , 2007 .

[7]  P. J. Westervelt.  The Theory of Steady Rotational Flow Generated by a Sound Field , 1953 .

[8]  J. Vanneste,et al.  Streaming by leaky surface acoustic waves , 2011, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[9]  James Friend,et al.  Particle concentration via acoustically driven microcentrifugation: microPIV flow visualization and numerical modelling studies , 2009 .

[10]  Novel Micro-Laboratory on Piezoelectric Crystal , 2009 .

[11]  M.J.S. Lowe,et al.  Matrix techniques for modeling ultrasonic waves in multilayered media , 1995, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[12]  O. Matar,et al.  Droplet displacements and oscillations induced by ultrasonic surface acoustic waves: a quantitative study. , 2010, Physical review. E, Statistical, nonlinear, and soft matter physics.

[13]  Yong Qing Fu,et al.  Surface acoustic wave induced streaming and pumping in 128° Y-cut LiNbO3 for microfluidic applications , 2009 .

[14]  Wesley L. Nyborg,et al.  Acoustic Streaming due to Attenuated Plane Waves , 1953 .

[15]  Leslie Y Yeo,et al.  Interfacial jetting phenomena induced by focused surface vibrations. , 2009, Physical review letters.

[16]  Yoshikazu Matsui,et al.  Liquid streaming and droplet formation caused by leaky Rayleigh waves , 1989, Proceedings., IEEE Ultrasonics Symposium,.

[17]  Mark C. T. Wilson,et al.  On the calculation of normals in free‐surface flow problems , 2004 .

[18]  Z Guttenberg,et al.  Flow profiling of a surface-acoustic-wave nanopump. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[19]  Jean-Pierre Sozanski,et al.  Monitoring SAW-actuated microdroplets in view of biological applications , 2009 .

[20]  A. Wixforth.  Acoustically driven microfluidic applications for on-chip laboratories , 2009, 2009 IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time forum.

[21]  Richard M. White,et al.  Surface elastic waves , 1970 .

[22]  James Friend,et al.  Transmitting high power rf acoustic radiation via fluid couplants into superstrates for microfluidics , 2009 .

[23]  J. Friend,et al.  Microscale acoustofluidics: Microfluidics driven via acoustics and ultrasonics , 2011 .

[24]  James Friend,et al.  Interfacial destabilization and atomization driven by surface acoustic waves , 2008 .

[25]  G. Lindner,et al.  Propulsion of droplets on non-piezoelectric substrates via mode conversion of Lamb waves , 2009, 2009 IEEE International Ultrasonics Symposium.

[26]  James Friend,et al.  MicroPIV and micromixing study of corona wind induced microcentrifugation flows in a cylindrical cavity , 2010 .

[27]  Jun Kondoh,et al.  Deposition of Thin Film Using a Surface Acoustic Wave Device , 2007 .

[28]  A. Wixforth,et al.  Flow patterns and transport in Rayleigh surface acoustic wave streaming: combined finite element method and raytracing numerics versus experiments , 2008, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[29]  Omar Elmazria,et al.  Microfluidic device based on surface acoustic wave , 2006 .

[30]  S. Shiokawa,et al.  Development of Novel Atomization System Based on SAW Streaming , 2004 .

[31]  Carl Eckart,et al.  Vortices and Streams Caused by Sound Waves , 1948 .

[32]  T. Blake.  The physics of moving wetting lines. , 2006, Journal of colloid and interface science.

[33]  J. Friend,et al.  Concentration and mixing of particles in microdrops driven by focused surface acoustic waves , 2008, 2008 IEEE Ultrasonics Symposium.

[34]  Yong Qing Fu,et al.  Experimental and numerical investigation of acoustic streaming excited by using a surface acoustic wave device on a 128° YX-LiNbO3 substrate , 2010 .

[35]  P. Talkner,et al.  Computing stationary free-surface shapes in microfluidics , 2006 .

[36]  Y. Fu,et al.  Streaming phenomena in microdroplets induced by Rayleigh surface acoustic wave , 2011 .

[37]  Leslie Y Yeo,et al.  Microparticle collection and concentration via a miniature surface acoustic wave device. , 2007, Lab on a chip.

[38]  Roger T. Howe,et al.  Microtransport induced by ultrasonic Lamb waves , 1991 .

[39]  Achim Wixforth,et al.  Microfluidic mixing via acoustically driven chaotic advection. , 2008, Physical review letters.

[40]  G. Lindner,et al.  Detection and removal of droplets on non-piezoelectric substrates via mode conversion of Lamb waves , 2010, 2010 IEEE Sensors.