University of Illinois Urbana-Champaign

Design guidelines of laser structured surfaces for enhanced pool boiling heat transfer

Chen, Yiyang

This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.

Permalink

https://hdl.handle.net/2142/132682

Description

Title
Design guidelines of laser structured surfaces for enhanced pool boiling heat transfer
Author(s)
Chen, Yiyang
Issue Date
2025-12-03
Director of Research (if dissertation) or Advisor (if thesis)
Miljkovic, Nenad
Department of Study
Mechanical Sci & Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
  • Pool Boiling
  • Refrigerant
  • Laser
Abstract
Boiling enhancement has emerged as a salient pathway to improve energy efficiency and reduce operating costs. In this work, we strengthen external pool boiling of R-1336mzz(Z) on tube exteriors by optimizing laser texturing recipes. Systematic adjustment of laser parameters enables deterministic control of surface morphology, with distinct parameter sets imparting characteristically different topographies. Guided by Hsu’s model, we select processing conditions that yield a broad distribution of re-entrant cavities whose sizes fall within the activation window while maintaining a high areal nucleation site density. The results show that, throughout the nucleate boiling regime, the HTC enhancement ratio of the laser textured tube exceeds 4 compared to the plain Cu tube. High speed visualization corroborates this gain by revealing dense bubble departure associated with the elevated population of active sites. These findings provide actionable guidance for the design and fabrication of laser processed surfaces for boiling applications.
Graduation Semester
2025-12
Type of Resource
Thesis
Handle URL
https://hdl.handle.net/2142/132682
Copyright and License Information
Copyright 2025 Yiyang Chen

Owning Collections

Graduate Dissertations and Theses at Illinois PRIMARY
Graduate Theses and Dissertations at Illinois