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  • Convection  (1)
  • heat transfer  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Heat transfer in an unevenly heated porous layer (1986)
    Springer
    Transport in porous media 1 (1986), S. 293-312 
    Details
    ISSN: 1573-1634
    Schlagwort(e): Convection ; geothermal heat transfer
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Technik allgemein
    Notizen: Abstract For a uniform saturated porous layer heated from below, the dependence of the quantity of heat transferred on the distribution of the heat source is investigated. It is found, using perturbation methods and numerical techniques, that very small nonuniformities in the heat source having the same wavelength as the preferred convection mode significantly reinforce natural convection.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00238184
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Heat transfer in a vertically-layered porous medium heated from below (1986)
    Springer
    Transport in porous media 1 (1986), S. 361-370 
    Details
    ISSN: 1573-1634
    Schlagwort(e): Vertical layers ; mathematical models ; geothermal systems ; heat transfer ; convection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Technik allgemein
    Notizen: Abstract Some studies already made have investigated the criterion for onset of convection and heat and mass flow distributions in a porous slab composed of horizontal layers of different materials. This paper reports a study of such criteria for the case where the slab is composed of vertically-aligned strata with different permeabilities and thermal conductivities. This has particular relevance to where blocks of different materials abut in a vertical plane, as well as the case of very narrow highly permeable vertical layers which represent vertical faults in a geological structure. Results indicate that permeability and/or thermal conductivity contrasts between layers can significantly affect the flow pattern and the spatial distribution of the surface heat flux. The concentration of flow in highly permeable ‘faults’ produces marked irregularities in the heat flow through the surface above them.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00208043
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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