An experimental study is performed to characterize the effect of meniscus recession on the effective pore radius and capillary pumping of copper metal foams which are to be used as wicks in heat pipes for electronic cooling. Knowledge of the effective pore radius is critical in defining the capillary pumping of a wicking material but is rarely measured under operating conditions. It is known that the meniscus of a liquid recedes when evaporating from a porous media, which could impact the effective pore radius and therefore the capillary pumping capabilities of the foam. To elucidate this impact, the evaporation rate is measured from foam strips wicking ethanol from a reservoir while applying heat fluxes to the foam. Using thermocouple and IR camera measurements, the measured evaporation rates are corrected to account for different thermal losses, including natural convection, direct thermal conduction to the liquid, and evaporation from the container. An analytical model is then developed to relate the evaporated mass to the maximum capillary pressure (minimum effective pore radius) provided by the foam. It is shown for the first time, that just before the onset of dryout, the recessed meniscus will lead to 15%, 28%, and 52% decrease in effective pore radius for samples with 68%, 75%, and 82% porosities, respectively. The capillary pumping therefore increases during evaporation. This can have significant impact on the prediction of the capillary limits in two phase capillary driven devices.
Skip Nav Destination
Article navigation
December 2014
Research-Article
Effect of Meniscus Recession on the Effective Pore Radius and Capillary Pumping of Copper Metal Foams
Mahmood R. S. Shirazy,
Mahmood R. S. Shirazy
Department of Mechanical Engineering,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Université de Sherbrooke
,Sherbrooke, PQ J1K2R1
, Canada
Search for other works by this author on:
Luc G. Fréchette
Luc G. Fréchette
Department of Mechanical Engineering,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Université de Sherbrooke
,Sherbrooke, PQ J1K2R1
, Canada
Search for other works by this author on:
Mahmood R. S. Shirazy
Department of Mechanical Engineering,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Université de Sherbrooke
,Sherbrooke, PQ J1K2R1
, Canada
Luc G. Fréchette
Department of Mechanical Engineering,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Institut Interdisciplinaire d'Innovation
Technologique—3IT,
Université de Sherbrooke
,Sherbrooke, PQ J1K2R1
, Canada
Contributed by the Electronic and Photonic Packaging Division of ASME for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received August 30, 2013; final manuscript received December 17, 2013; published online September 19, 2014. Assoc. Editor: Satish Chaparala.
J. Electron. Packag. Dec 2014, 136(4): 041003 (8 pages)
Published Online: September 19, 2014
Article history
Received:
August 30, 2013
Revision Received:
December 17, 2013
Citation
Shirazy, M. R. S., and Fréchette, L. G. (September 19, 2014). "Effect of Meniscus Recession on the Effective Pore Radius and Capillary Pumping of Copper Metal Foams." ASME. J. Electron. Packag. December 2014; 136(4): 041003. https://doi.org/10.1115/1.4026353
Download citation file:
Get Email Alerts
Cited By
Enhancing Mechanical Reliability of Silver-Sintered Joints With Copper Nanowires in High-Power Electronic Devices
J. Electron. Packag (December 2024)
Special Issue on InterPACK2023
J. Electron. Packag (December 2024)
Impact of Encapsulated Phase Change Material Additives for Improved Thermal Performance of Silicone Gel Insulation
J. Electron. Packag (December 2024)
Related Articles
Nucleate Boiling Comparison between Teflon-Coated Plain Copper and Cu-HTCMC in Water
J. Heat Transfer (August,2018)
Experimental Measurements and Numerical Computation of Nano Heat Transfer Enhancement Inside a Porous Material
J. Thermal Sci. Eng. Appl (February,2020)
Effect of Liquid Properties on Phase-Change Heat Transfer in Porous Wick Structures
J. Heat Transfer (March,2016)
Flow Visualization and Local Measurement of Forced Convection Heat Transfer in a Microtube
J. Heat Transfer (March,2010)
Related Proceedings Papers
Related Chapters
Energy Balance for a Swimming Pool
Electromagnetic Waves and Heat Transfer: Sensitivites to Governing Variables in Everyday Life
Completing the Picture
Air Engines: The History, Science, and Reality of the Perfect Engine
Compressive Deformation of Hot-Applied Rubberized Asphalt Waterproofing
Roofing Research and Standards Development: 10th Volume