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Boiling Heat Transfer with a Well-Ordered Microporous Architecture
Quang N Pham1, Shiwei Zhang2, Shuai Hao2
1Department of Materials and Manufacturing Technology, University of California Irvine, Irvine, California 92697, United States.
ACS Applied Materials & Interfaces
|April 3, 2020
Summary
Researchers optimized boiling heat transfer in inverse opals (IOs) by designing porous structures. This resulted in a 336% enhancement in heat-transfer coefficient (HTC) for advanced thermal management.
Area of Science:
- Materials Science
- Heat Transfer
- Nanotechnology
Background:
- Boiling heat transfer in porous media offers high liquid-vapor interfacial area and nucleation sites.
- Porous structures can enhance heat transfer efficiency for thermal management applications.
Purpose of the Study:
- To characterize boiling performance in inverse opals (IOs) with controlled architectures.
- To understand how structural characteristics influence boiling heat transfer mechanisms.
- To optimize porous media design for enhanced heat transfer.
Main Methods:
- Utilizing well-ordered inverse opal (IO) structures with defined thicknesses and pore diameters.
- Empirical measurements and hydrodynamic mechanism identification.
- Validation of structural effects on boiling performance.
Main Results:
- Up to 336% enhancement in boiling heat-transfer coefficient (HTC) compared to smooth surfaces.
- Optimal HTC and critical heat flux observed at 3-4 μm structure thickness.
- Pore diameter optimization (0.3-1.0 μm) balanced permeability and viscous resistance.
Conclusions:
- Rational design of IO structure thickness and pore diameter optimizes boiling performance.
- Understanding liquid-vapor occupation and transport resistance is key for enhancement.
- This work provides insights for enhancing multiphase heat transfer in microporous media for ultrahigh heat flux applications.
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