RESEARCH PAPERS: Multiphase Heat Transfer

Complete Transient Two-Dimensional Analysis of Two-Phase Closed Thermosyphons Including the Falling Condensate Film

[+] Author and Article Information
C. Harley, A. Faghri

Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH 45435

J. Heat Transfer 116(2), 418-426 (May 01, 1994) (9 pages) doi:10.1115/1.2911414 History: Received April 26, 1993; Revised August 12, 1993; Online May 23, 2008


A transient two-dimensional thermosyphon model is presented that accounts for conjugate heat transfer through the wall and the falling condensate film. The complete transient two-dimensional conservation equations are solved for the vapor flow and pipe wall, and the liquid film is modeled using a quasi-steady Nusselt-type solution. The model is verified by comparison with existing experimental data for a low-temperature thermosyphon with good agreement. A typical high-temperature thermosyphon was then simulated to examine the effects of vapor compressibility and conjugate heat transfer.

Copyright © 1994 by The American Society of Mechanical Engineers
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