The problem of heat transfer from a constant-wall-temperature pipe buried in a semi-infinite solid medium with a plane surface exposed to a fluid flow is solved semi-analytically. Using a conformal mapping, the original semi-infinite physical domain is transformed into a finite rectangular domain. A singular Fredholm integral equation of the second kind is derived and solved numerically to find the temperature distribution for the solid. The total heat flux Q from the exposed surface is expressed by modifying the conventional expression Q=kS Delta T to Q= eta kS Delta T, where S is the conduction shape factor, k is the thermal conductivity of the solid, and Delta T represents the temperature difference between the pipe wall and the surrounding fluid. The panel efficiency eta and maximum surface temperature are presented in terms of the Biot number and a geometric parameter, L/D.


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    Titel :

    Semi-analytical solution for heat transfer from a buried pipe with convection on the exposed surface


    Beteiligte:
    Mo Chung (Autor:in) / Jung, Pyung-Suk (Autor:in) / Rangel, R.H. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1999


    Format / Umfang :

    16 Seiten, 14 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





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