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Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns.

Journal of visualized experiments : JoVE·2017

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Updated: May 22, 2026

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Published on: April 10, 2017

Pool boiling of nanoparticle-modified surface with interlaced wettability.

Chin-Chi Hsu¹, Tsung-Wen Su, Ping-Hei Chen

¹Department of Mechanical Engineering, National Taiwan University, No, 1, Sec, 4, Roosevelt Rd, Taipei, 10617, Taiwan. phchen@ntu.edu.tw.

Nanoscale Research Letters

|May 22, 2012

Summary

Altering surface wettability with nano-silica particles enhances critical heat flux during pool boiling. Interlaced wettability, even with small contact angle differences, consistently outperforms uniform surfaces for better heat transfer.

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Last Updated: May 22, 2026

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Area of Science:

Heat Transfer
Surface Science
Nanotechnology

Background:

Pool boiling is a crucial heat transfer mechanism in many industrial applications.
Surface wettability significantly influences boiling performance, particularly critical heat flux (CHF).
Understanding how to manipulate surface properties for enhanced heat transfer is an ongoing research area.

Purpose of the Study:

To investigate the effect of interlaced wettability on pool boiling heat transfer.
To explore the role of nano-silica particles in modifying surface wettability.
To determine the relationship between surface wettability patterns and critical heat flux.

Main Methods:

Fabrication of heating surfaces with varying interlaced wettability using nano-silica particle coatings.
Experimental measurement of pool boiling heat transfer performance.
Analysis of critical heat flux under different wettability conditions.

Main Results:

Uniformly wettable surfaces show increased critical heat flux with higher wettability.
Interlaced wettability surfaces consistently exhibit higher critical heat flux than isotropic surfaces.
Smaller contact angle differences between surface regions lead to higher critical heat flux.

Conclusions:

Interlaced surface wettability is a highly effective strategy for enhancing critical heat flux in pool boiling.
Nano-silica particle coatings provide a viable method for creating such surfaces.
Optimizing the wettability contrast is key to maximizing heat transfer enhancement.