Porous materials, including bulk materials, are widely used for cleaning liquid and gaseous media from mechanical impurities, as heat insulating materials, working bodies in various technologies of mechanical engineering, power engineering, metallurgy, chemistry, petroleum chemistry, food industry, pharmacology, etc. The aim of the work is mathematical modeling of heat transfer in disperse bulk media, their melting, engineering assessment of a number of indicators essential in practice. A bulk disperse medium consisting of solid particles (lumps) of different shapes, sizes and composition, randomly arranged relative to each other, is considered. The article provides relationships for determining effective density, heat capacity, thermal conductivity, taking into account radiant heat transfer between particles (lumps) as applied to porous bulk materials. Using the obtained relationships, the model problem of heating and subsequent melting of the disperse medium under consideration is solved. The melting rate and the relaxation time during which the system consisting of melt and lumps comes to thermodynamic equilibrium are assessed. Though only one-dimensional thermal processes are considered in this paper, the proposed approach can be extended to two- and three-dimensional cases and applied for mathematical description of thermal behavior of nonmetallic porous materials. It is these materials that are mainly used for thermal insulation. Their behavior, especially in extreme, abnormal conditions is of great interest.


    Access

    Download


    Export, share and cite



    Title :

    Heating and melting of bulk lump materials


    Contributors:


    Publication date :

    2018




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Der Lump

    Brendel, Engelbert | GWLB - Gottfried Wilhelm Leibniz Bibliothek | 1973


    Degradation of lump ores and similar materials in transport

    Sandberg, Nils / Fagerberg, Bengt | TIBKAT | 1974


    FOOD MATERIAL LUMP GRIPPING DEVICE

    AOKI FUTOSHI | European Patent Office | 2022

    Free access

    Clamp for hoisting sponge titanium lump

    XU WEICHUN / YIN SHIHAO / ZHAO YU | European Patent Office | 2023

    Free access

    Vertical hoisting clamp for sponge titanium lump

    YIN SHIHAO / HE XINGPENG / HAN LICHEN | European Patent Office | 2024

    Free access