Spray cooling has become increasingly popular as a thermal management solution for high‐heat flux (>100  W / cm 2 ) applications such as laser diodes and radars. Research has shown that using sub‐cooled liquid can increase the heat flux from the hot surface. The objective of this study was to use a multi‐phase numerical model to simulate the effect of a sub‐cooled droplet impacting a growing vapor bubble in a thin (<100 μ m ) liquid film. The two‐phase model captured the liquid‐vapor interface using the level set method. The effects of surface tension, viscosity, gravity and phase change were accounted for by using a modification to the incompressible Navier‐Stokes equations, which were solved using the finite difference method. The computed liquid‐vapor interface and temperature distributions were visualized for better understanding of the heat removal process. To understand the heat transfer mechanisms of sub‐cooled droplet impact on a growing vapor bubble, various initial droplet temperatures were modeled (from 20 °C below saturation temperature to saturation temperature). This may provide insights into how to improve the heat transfer in future spray cooling systems.


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    Titel :

    Spray Cooling Modeling: Droplet Sub‐Cooling Effect on Heat Transfer


    Beteiligte:
    Johnston, Joseph E. (Autor:in) / Selvam, R. P. (Autor:in) / Silk, Eric A. (Autor:in) / El‐Genk, Mohamed S. (Herausgeber:in)

    Kongress:

    SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM‐STAIF 2008: 12th Conference on Thermophysics Applications in Microgravity; 1st Symposium on Space Resource Utilization; 25th Symposium on Space Nuclear Power and Propulsion; 6th Conference on Human/Robotic Technology and the Vision for Space Exploration; 6th Symposium on Space Colonization; 5th Symposium on New Frontiers and Future Concept ; 2008 ; Albuquerque (New Mexico)


    Erschienen in:

    AIP Conference Proceedings ; 969 , 1 ; 104-111


    Erscheinungsdatum :

    21.01.2008


    Format / Umfang :

    8 pages





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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