Natural convection from a buried pipe with a layer of backfill is numerically examined in this study. The objective of the present study is to investigate how a step change in the permeability of the backfill would affect the flow patterns and heat transfer results. Numerical calculations have covered a wide range of the governing parameters (i.e., 10 <= Ra1 <= 500 and 0.1 <= K1/K2 <= 10) for various backfill thicknesses (0.5 <= t/ri <= 2). The results suggest that a more permeable backfill can minimize the heat loss and confine the flow to a region close to the pipe.


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    Title :

    Effects of backfill on heat transfer from a buried pipe


    Additional title:

    Einfluss der Verfüllung auf den Wärmeübergang einer erdverlegten Rohrleitung


    Contributors:
    Ngo, C.C. (author) / Lai, F.C. (author)


    Publication date :

    2005


    Size :

    5 Seiten, 8 Bilder, 16 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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