Physics-Based Modeling and Measurement of High-Flux Condensation Heat Transfer

Abstract

This report examines condensation of FC-72 along parallel, square micro-channels with a hydraulic diameter of 1 mm and a length of 29.9 cm, which are formed in the top surface of a solid copper plate. Using high-speed video imaging and photomicrographic techniques, five distinct flow regimes are identified: smooth-annular, wavy-annular, transition, slug, and bubbly, with the smooth-annular and wavy-annular regimes being most prevalent. A theoretical control-volume-based model is proposed based on the assumptions of smooth interface between the annular liquid film and vapor core, and uniform film thickness around the channel's circumference. The new model accurately captures the pressure drop and heat transfer coefficient data in both magnitude and trend, evidenced by mean absolute error values of 3.6% and 9.3%, respectively.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2011
Accession Number
ADA549369

Entities

People

  • Issam Mudawar
  • Joseph Kim
  • Sung-min Kim

Organizations

  • Purdue University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Annular Flow
  • Boundary Layer
  • Channel Flow
  • Computational Fluid Dynamics
  • Equations
  • Flow Visualization
  • Fluid Flow
  • Heat Energy
  • Heat Loss
  • Heat Transfer
  • Heat Transfer Coefficients
  • Latent Heat
  • Mechanical Engineering
  • Surface Tension
  • Thermophysical Properties
  • Turbulent Flow
  • Turbulent Mixing

Readers

  • Combustion and Flow Dynamics.