Automatic contactless injection, transportation, merging, and ejection of droplets with a multifocal point acoustic levitator

Date

2018

Authors

Brizzotti Andrade, Marco Aurélio
Camargo, Thales S. A.

Director

Publisher

AIP Publishing
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa

Project identifier

Impacto
No disponible en Scopus

Abstract

We present an acoustic levitation system that automatically injects, transports, merges and ejects liquid droplets in mid-air. The system consists of a phased array operating at 40 kHz on top of a plane reflector. The phase array generates multiple focal points at independent positions that form standing waves between the array and the reflector. In the reflector there is an inlet for a piezoelectric droplet injector which automatically inserts liquid droplets at the lower pressure nodes of the standing waves, and a hole that serves as an outlet for ejecting the processed droplets out of the system. Simulations of the acoustic radiation potential acting on the levitating droplets are in good agreement with the experiments. High-speed footage captured the functioning of the system in four fluidic operations: injection, transport, merging and ejection of liquid droplets. Having these operations integrated reliably into a single automatic system paves the way for the adoption of mid-air acoustophoretic processing in biological, chemical and pharmaceutical applications.

Description

The following article appeared in Andrade, Marco A.B., Marzo, Asier, (2018). Automatic contactless injection, transportation, merging, and ejection of droplets with a multifocal point acoustic levitator. Review of Scientific Instruments December 2018 89 (12), doi: 10.1063/1.5063715 and may be found at http://dx.doi.org/doi: 10.1063/1.5063715.

Keywords

Automatic contactless injection, Point acoustic levitator

Department

Estadística, Informática y Matemáticas / Estatistika, Informatika eta Matematika

Faculty/School

Degree

Doctorate program

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© 2018 Author(s)

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