Version 1
: Received: 4 September 2024 / Approved: 9 September 2024 / Online: 9 September 2024 (08:30:22 CEST)
How to cite:
Hashemiesfahan, M.; Gelin, P.; Gardeniers, H.; De Malsche, W. Enhanced Acoustic Mixing in Silicon-Based Chips with Sharp-Edged Micro-Structures. Preprints2024, 2024090638. https://doi.org/10.20944/preprints202409.0638.v1
Hashemiesfahan, M.; Gelin, P.; Gardeniers, H.; De Malsche, W. Enhanced Acoustic Mixing in Silicon-Based Chips with Sharp-Edged Micro-Structures. Preprints 2024, 2024090638. https://doi.org/10.20944/preprints202409.0638.v1
Hashemiesfahan, M.; Gelin, P.; Gardeniers, H.; De Malsche, W. Enhanced Acoustic Mixing in Silicon-Based Chips with Sharp-Edged Micro-Structures. Preprints2024, 2024090638. https://doi.org/10.20944/preprints202409.0638.v1
APA Style
Hashemiesfahan, M., Gelin, P., Gardeniers, H., & De Malsche, W. (2024). Enhanced Acoustic Mixing in Silicon-Based Chips with Sharp-Edged Micro-Structures. Preprints. https://doi.org/10.20944/preprints202409.0638.v1
Chicago/Turabian Style
Hashemiesfahan, M., Han Gardeniers and Wim De Malsche. 2024 "Enhanced Acoustic Mixing in Silicon-Based Chips with Sharp-Edged Micro-Structures" Preprints. https://doi.org/10.20944/preprints202409.0638.v1
Abstract
The small dimensions of microfluidic channels allow for fast diffusive or passive mixing, which is beneficial for time-sensitive applications such as chemical reactions, biological assays, and the transport of to-be-detected species to sensors. In microfluidics, the need for fast mixing within milliseconds arises primarily because these devices are often used in fields where rapid and efficient mixing significantly impacts the performance and outcome of the processes. Active mixing with acoustics in microfluidic devices involves using acoustic waves to enhance the mixing of fluids within microchannels. Using sharp corners and wall patterns in acoustofluidic devices significantly enhances mixing by acoustic streaming around these features. The streaming patterns around sharp edges are particularly effective for mixing because they can produce strong lateral flows that rapidly homogenize liquids. This work presents extensive characterizations of the effect of sharp-edged structures on acoustic mixing in bulk acoustic wave (BAW) mode in a silicon microdevice. The effect of side wall patterns in different angles and shapes, their position, the type of piezoelectric transducer, and its amplitude and frequency have been studied. Following the patterning of the channel walls, a mixing time of 25 times faster was reached, compared to channels with smooth sidewalls exhibiting conventional BAW behavior. The average locally determined acoustic streaming velocity inside the channel becomes 14 times faster if sharp corners of 10° are added to the wall.
Keywords
sharp corners; fast mixing; acoustofluidics
Subject
Engineering, Chemical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
