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Time and Space Resolved Wall Temperature Measurements During Nucleate Boiling With Constant Heat Flux Boundary Conditions

[+] Author Affiliations
Jerry G. Myers, Sam W. Hussey, Glenda F. Yee

NASA Glenn Research Center, Brookpark, OH

Vamsee K. Yerramilli, Jungho Kim

University of Maryland, College Park, MD

Paper No. HT-FED2004-56169, pp. 453-460; 8 pages
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 3
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4692-X | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME


The lack of temporally and spatially resolved measurements under nucleate bubbles has complicated efforts to fully explain pool-boiling phenomena. The objective of this current work is to acquire time and space resolved temperature distributions under nucleate bubbles on a constant heat flux surface. This was performed using a microheater array with 100 μm resolution that allowed effectively simultaneous measurements of surface temperature while supplying a constant dissipative heat flux. This data is then correlated with high speed (> 1000Hz) visual recordings of the bubble growth and departure from the heater surface acquired from below and from the side of the heater. The data indicate that a significant source of energy during bubble nucleation and initial growth is the superheated layer around the bubble. Bubble coalescence was not observed to decrease surface temperature as significantly as bubble departure from the surface. Since bubble departure is typically followed by a sharp increase in the heater surface temperature, it is surmised that the departing bubble effectively removes the superheated layer, allowing a higher local heat transfer rate with the bulk fluid through transient conduction/micro-convection during rewetting.

Copyright © 2004 by ASME



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