Ψ-PIV: A novel framework to study unsteady microfluidic flows

Ankur Kislaya, Antaran Deka, Peter Veenstra, Daniel Tam, Jerry Westerweel

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

83 Downloads (Pure)

Abstract

In micro-PIV, reaching the optimum image density has always been difficult due to high displacement gradient, coagulation of particles at the inlet and due to particles adhering to the surface to name a few. The most widely used method is to take ensemble correlation average of multiple PIV images to extract the velocity field. However, this leads to low temporal resolution. Hence, a method with high temporal resolution is pivotal to study unsteady laminar flow in microfluidic application. This work aims at developing a new PIV algorithm which reduces the effective seeding density and at the same time yield similar if not higher SNR compared to conventional PIV. We call this algorithm Ψ-PIV. This method is suitable for steady and unsteady laminar flows which are generally found in microfluidic applications. The reliability and the precision of the new method as a function of particle image pairs is investigated by synthetic image analysis. The main advantage of Ψ-PIV is its ability to achieve higher temporal resolution from the typical micro-PIV raw images. The experimental investigation for the flow around a 2D cylinder in a Hele-Shaw cell showed that the Ψ-PIV results in a reduction by approximately a factor of 25 in the number of frames required compared to conventional PIV.
Original languageEnglish
Title of host publicationProceedings of the 19th International Symposium on Application of Laser and Imaging Techniques to Fluid Mechanics
Place of PublicationLisboa, Portugal
PublisherInstituto Superior Técnico
Pages1098-1106
Publication statusPublished - 2018
EventLXLASER2018: 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics - Lisbon, Portugal
Duration: 16 Jul 201819 Jul 2018
Conference number: 19
http://www.lisbon-lasersymposium.org/LXLASER2018

Conference

ConferenceLXLASER2018: 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Abbreviated titleLXLASER2018
CountryPortugal
CityLisbon
Period16/07/1819/07/18
Internet address

Keywords

  • PIV processing
  • Micro PIV
  • Microfluidics
  • stream-function
  • streamline
  • unsteady laminar flow

Fingerprint Dive into the research topics of 'Ψ-PIV: A novel framework to study unsteady microfluidic flows'. Together they form a unique fingerprint.

  • Cite this

    Kislaya, A., Deka, A., Veenstra, P., Tam, D., & Westerweel, J. (2018). Ψ-PIV: A novel framework to study unsteady microfluidic flows. In Proceedings of the 19th International Symposium on Application of Laser and Imaging Techniques to Fluid Mechanics (pp. 1098-1106). Instituto Superior Técnico.