title: Automated and temperature-controlled micro-PIV measurements enabling long-term-stable microchannel acoustophoresis characterization.
abstract: We present a platform for micro particle image velocimetry (μPIV), capable of carrying out full-channel, temperature-controlled, long-term-stable, and automated μPIV-measurement of microchannel acoustophoresis with uncertainties below 5% and a spatial resolution in the order of 20 μm. A method to determine optimal μPIV-settings for obtaining high-quality results of the spatially inhomogeneous acoustophoretic velocity fields of large dynamical range is presented. In particular we study the dependence of the results on the μPIV interrogation window size and the number of repeated experiments. The μPIV-method was further verified by comparing it with our previously published particle tracking method. Using the μPIV platform we present a series of high-resolution measurements of the acoustophoretic velocity field as a function of the driving frequency, the driving voltage, and the resonator temperature. Finally, we establish a direct and consistent connection between the obtained acoustophoretic velocity fields, and continuous flow mode acoustophoresis, commonly used in applications.
authors: Department of Measurement Technology and Industrial Electrical Engineering, Lund University, PO-Box 118, S-221 00, Lund, Sweden.
authors: Per
authors: P
authors: Augustsson
authors: Rune
authors: R
authors: Barnkob
authors: Steven T
authors: ST
authors: Wereley
authors: Henrik
authors: H
authors: Bruus
authors: Thomas
authors: T
authors: Laurell
mesh_terms: D001331:Automation; D004581:Electronics; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation; D012212:Rheology / Q000295:instrumentation / Q000379:methods*; D013696:Temperature