Supersonically spray-coated copper meshes as textured surfaces for pool boiling

Hong Seok Jo, Min Woo Kim, Tae Gun Kim, Seongpil An, Hyun Goo Park, Jong Gun Lee, Scott C. James, Jeehoon Choi, Sam S. Yoon

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Pool boiling is a process through which heat is removed upon the vaporization of a coolant fluid surrounding a heated surface and is often applied for cooling high-performance computing systems and nuclear reactors. Increasing the surface-to-volume ratio in confined spaces enhances this cooling method. Here, we introduce textured copper pillars with various geometric arrangements and study their effects on the pool-boiling performance. Frustum pyramids were formed by supersonic spraying copper microparticles through a wire mesh to form pillars of various sizes. We identified an optimal pyramid-base size of 0.91 mm on each side corresponding to the maximum heat transfer coefficient, critical heat flux, boiling heat transfer, and cross-flow coolant velocity over the pyramids. Maximum bubble nucleation was also achieved using this specific geometric arrangement. Such a geometric design can be installed in heat pipe cooling systems to cool electronic devices and nuclear reactors.

Original languageEnglish
Pages (from-to)26-33
Number of pages8
JournalInternational Journal of Thermal Sciences
Publication statusPublished - 2018 Oct


  • Copper nanoparticles
  • Critical heat flux
  • Pool boiling
  • Superheat temperature
  • Supersonic spraying

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)


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