Abstract
Flow characteristics of water were tested in a rectangular microchannel for Reynolds number (Re) between 0 and 446 by terahertz time domain spectroscopy (THz-TDS). Output THz peak trough intensities and the calculated absorbances of the flow were analyzed theoretically. The results show a rapid change for Re < 250 and a slow change as Re increases, which is caused by the early transition from laminar to transition flow beginning nearly at Re = 250. Then this finding is confirmed in the plot of the flow resistant. Our results demonstrate that the THz-TDS could be a valuable tool to monitor and character the flow performance in microscale structures.
Highlights
The emergence of micro-electro-mechanical systems has attracted significant interest in the field of microscale devices
The results of this study demonstrate the potential of terahertz time domain spectroscopy (THz-TDS) for microfluidic studies
THzTHz pulse waveform in the timetime domain experiment consisted a recorded pulse waveform in the and pressure drop at varying velocity intervals
Summary
The emergence of micro-electro-mechanical systems has attracted significant interest in the field of microscale devices. Due to the higher surface to volume ratio caused by the smaller typical length, the surface force as well as microchannel wall wettability has great influence on the fluid movement; there will be significant departure of flow characteristics from the conventional flow as fluid is induced to flow through the microchannel [1,2]. In order to predict the flow performance in such micro devices accurately, it is necessary to understand the fluid flow characteristics on the microscale. The design and control of microfluidic devices require the fundamental understanding of flow characteristics such as flow pattern transition and pressure loss. Other investigations have supported the earlier findings and have served to illustrate that the flow characteristics are strongly affected by the surface roughness [6,7]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
