Journal article
Increasing Boiling Heat Transfer using Low Conductivity Materials
Scientific reports, v 5(1), pp 13145-13145
18 Aug 2015
PMID: 26281890
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We report the counterintuitive mechanism of increasing boiling heat transfer by incorporating low-conductivity materials at the interface between the surface and fluid. By embedding an array of non-conductive lines into a high-conductivity substrate, in-plane variations in the local surface temperature are created. During boiling the surface temperature varies spatially across the substrate, alternating between high and low values, and promotes the organization of distinct liquid and vapor flows. By systematically tuning the peak-to-peak wavelength of this spatial temperature variation, a resonance-like effect is seen at a value equal to the capillary length of the fluid. Replacing ~18% of the surface with a non-conductive epoxy results in a greater than 5x increase in heat transfer rate at a given superheat temperature. This drastic and counterintuitive increase is shown to be due to optimized bubble dynamics, where ordered pathways allow for efficient removal of vapor and the return of replenishing liquid. The use of engineered thermal gradients represents a potentially disruptive approach to create high-efficiency and high-heat-flux boiling surfaces which are naturally insensitive to fouling and degradation as compared to other approaches.
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Details
- Title
- Increasing Boiling Heat Transfer using Low Conductivity Materials
- Creators
- Md Mahamudur Rahman - Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USAJordan Pollack - Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USAMatthew McCarthy - Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USA
- Publication Details
- Scientific reports, v 5(1), pp 13145-13145
- Publisher
- Springer Nature; England
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000359663700001
- Scopus ID
- 2-s2.0-84939431144
- Other Identifier
- 991014878187504721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Thermodynamics