Living reference work entry
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Ultrasonic pumps are the pumps that use acoustic streaming effect to create fluid flow. The acoustic streaming effect arises from the interaction between the surface acoustic waves (SAW) traveling inside a piezoelectric substrate and the fluid. Attenuation of the SAW traveling inside the fluid (via reflection, diffraction, etc.) generates a body force within the fluid which is in the direction of wave propagation and converts acoustic energy into kinetic energy of the fluid . SAW devices can be used to transport droplets on a free surface between the input and output piezoelectric transducers (also known as interdigital transducer (IDT)). A schematic drawing of such a device is given in Fig. 1. Moreover, the same mechanism can be used to drive droplets as well as bulk fluid inside closed microchannels.
- 1.Martin SE (2001) Parametric analysis of acoustic streaming pumps utilizing planar ultrasonic acoustic beams. MS thesis, Vanderbilt UniversityGoogle Scholar
- 5.Minor KT (2002) Acoustic streaming micropumps. MS thesis, Vanderbilt University, NashvilleGoogle Scholar
- 12.Chao C, Cheng CH, Liu Z, Yang M, Leung WWF (2008) An ultrasound-actuated micropump that uses nanoporous one-way membrane as nozzle-diffuser. In: IEEE international ultrasonics symposium proceedingsGoogle Scholar
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