Simultaneous velocity profile and temperature profile measurements in microfluidics
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Simultaneous non-intrusive temperature and velocity measurements in flows are of high technological interest, e.g. to study the heat transfer in microfluidic environments. However, a measurement system that offers a low velocity uncertainty and micrometre spatial resolution as well as highly accurate temperature measurements in a single device has not been demonstrated so far. In this work, this problem is solved by combining a Laser Doppler Velocity Profile Sensor (LDV-PS) with Laser-Induced Fluorescence (LIF). Seeding particles are employed, that contain the fluorescent dyes uranine and rhodamine B. The multiple dye approach eliminates the influence of the droplet size. Relative velocity uncertainties of down to 0.4% and a temperature uncertainty of down to 0.24∘C with a spatial resolution of 10μm are achieved in a demonstration air flow experiment. The method has the potential to be optimised for different temperature ranges and uncertainty requirements, making it applicable on a wide range of thermal flows like fuel cells or microbioreactors. A better understanding of heat exchange processes can improve the energy efficiency of microfluidic devices.
Details
Original language | English |
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Article number | 102106 |
Number of pages | 7 |
Journal | Flow measurement and instrumentation |
Volume | 83 |
Publication status | Published - Mar 2022 |
Peer-reviewed | Yes |
External IDs
WOS | 000744536000005 |
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unpaywall | 10.1016/j.flowmeasinst.2021.102106 |
Keywords
Sustainable Development Goals
ASJC Scopus subject areas
Keywords
- Laser Doppler velocimetry, Laser Doppler velocity profile sensor, Laser-induced fluorescence, Microfluidics, Optical flow measurement, Optical temperature measurement