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Keywords = borosilicate glass (pyrex)

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14 pages, 2645 KiB  
Article
Modeling of Microdevices for SAW-Based Acoustophoresis — A Study of Boundary Conditions
by Nils Refstrup Skov and Henrik Bruus
Micromachines 2016, 7(10), 182; https://doi.org/10.3390/mi7100182 - 5 Oct 2016
Cited by 31 | Viewed by 6644
Abstract
We present a finite-element method modeling of acoustophoretic devices consisting of a single, long, straight, water-filled microchannel surrounded by an elastic wall of either borosilicate glass (pyrex) or the elastomer polydimethylsiloxane (PDMS) and placed on top of a piezoelectric transducer that actuates the [...] Read more.
We present a finite-element method modeling of acoustophoretic devices consisting of a single, long, straight, water-filled microchannel surrounded by an elastic wall of either borosilicate glass (pyrex) or the elastomer polydimethylsiloxane (PDMS) and placed on top of a piezoelectric transducer that actuates the device by surface acoustic waves (SAW). We compare the resulting acoustic fields in these full solid-fluid models with those obtained in reduced fluid models comprising of only a water domain with simplified, approximate boundary conditions representing the surrounding solids. The reduced models are found to only approximate the acoustically hard pyrex systems to a limited degree for large wall thicknesses and but not very well for acoustically soft PDMS systems shorter than the PDMS damping length of 3 mm. Full article
(This article belongs to the Special Issue Surface Acoustic Wave Microfluidics)
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