Library Subscription: Guest

ISSN Online: 2379-1748

8th Thermal and Fluids Engineering Conference (TFEC)
March, 26-29, 2023, College Park, MD, USA
Gain(open in a new tab)
Purchase $20.00(open in a new tab) Check subscription(open in a new tab) Publication Ethics and MalpracticeIt's a pdf file. (open in a new tab) Recommend to my Librarian(open in a dialog) Bookmark this Page

EFFECT OF A COATING ON TRANSIENT THERMAL SPREADING RESISTANCE IN A CYLINDRICAL FLUX TUBE

Get access (open in a dialog) pages 1399-1409
DOI: 10.1615/TFEC2023.fnd.046328
Lisa Steigerwalt Lam
Department of Mechanical Engineering, Tufts University, Medford, MA, 02155; Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. Johns, NL, Canada, A1B 3X5
Sahar Goudarzi
Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. Johns, NL, Canada, A1B 3X5
Yuri S. Muzychka
Department of Mechanical Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada
Greg F. Naterer
Department of Mechanical Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada; Faculty of Sustainable Design Engineering, University of Prince Edward Island, Charlottetown, PE Canada, C1A 4P3

Abstract

A transient spreading resistance expression is obtained by solving the heat equations in a coated cylindrical flux tube with a constant heat flux circular source applied to the surface. The flux tube is semi-infinite. The resulting expression is a function of constriction ratio and time. The case of multiple coatings is considered and a general approach for calculating transient spreading resistance from a constant heat flux circular source is provided. For short times, the dimensionless transient spreading resistance is proportional to the spreading resistance in the top coating. For long times, the dimensionless spreading resistance approaches the values of the steady-state expressions in the literature. This expression is relevant to a variety of thermal transport problems.
KEY WORDS: Transient spreading resistance, constriction resistance, droplet solidification