Abstract
A centimeter-sized liquid bridge constrained between two insulated discs is surrounded by another immiscible liquid, which is heated or cooled via a ring heater/cooler. The effect of ring position on the circulation patterns and heat transfer is investigated with the help of 2D axisymmetric numerical simulations. Such systems are important in capillary adhesion devices, biological heat transfer and phase-change-material-based thermoelectric generators. An increase in the heat transfer rate is observed when the heating (cooling) ring is placed near the bottom (top) disc. However, the net heat transferred to the capillary bridge is not a monotonic function of the heater/cooler position. The cooler configuration shows a minimum heat transfer for the cooler ring lying midway between the two solid discs, whereas, for the heater configuration this occurs for a heater position further below this point. Moreover, the heat transfer rate changes drastically with respect to the cooler position near the top disc, whereas, it is more gradual in the cases with a heating ring surrounding the capillary bridge. Additionally, an unstable regime is discovered for low aspect ratios which causes temporal oscillations in the velocity and temperature fields.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.