TY  - EJOU
AU  - Cai, Pengcheng 
AU  - Li, Teng 
AU  - Xu, Jianxin 
AU  - Li, Xiaobo 
AU  - Li, Zhiqiang 
AU  - Xu, Zhiwen 
AU  - Wang, Hua 

TI  - Enhanced Boiling Heat Transfer in Water Pools with Perforated Copper Beads and Sodium Dodecyl Sulfate Surfactant
T2  - Fluid Dynamics \& Materials Processing

PY  - 2025
VL  - 21
IS  - 2
SN  - 1555-2578

AB  - 
In modern engineering, enhancing boiling heat transfer efficiency is crucial for optimizing energy use and several industrial processes involving different types of materials. This study explores the enhancement of pool boiling heat transfer potentially induced by combining perforated copper particles on a heated surface with a sodium dodecyl sulfate (SDS) surfactant in saturated deionized water. Experiments were conducted at standard atmospheric pressure, with heat flux ranging from 20 to 100 kW/m<sup>2</sup>. The heating surface, positioned below the layer of freely moving copper beads, allowed the particle layer to shift due to liquid convection and steam nucleation. The study reports on the influence of copper bead diameter (2, 3, 4, and 5 mm), particle quantity, arrangement, and SDS concentration (20, 200, and 500 ppm). It is shown that the combination of 5 mm particles and a 500 ppm SDS concentration can yield a remarkable 139% improvement in heat transfer efficiency. As demonstrated by direct flow visualization, bubble formation occurs primarily in the gaps between the particles and the heated surface, with the presence of SDS reducing bubble size and accelerating bubble detachment.
KW  - Pool boiling; heat transfer enhancement; perforated copper beads; surfactant; bubble nucleation mechanism; flow visualization

DO  - 10.32604/fdmp.2024.057496