A.A.  Adeyanju, K.  Manohar, 
    Theoretical and Experimental Investigation of Heat Transfer in Packed Beds,
    Research Journal of Applied Sciences,
    Volume 4,Issue 5,
    2009,
    Pages 166-177,
    ISSN 1815-932x,
    rjasci.2009.166.177,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2009.166.177)
    Abstract: </B> The review of heat transfer in packed beds has been carried out with the emphasis on both experimental and theoretical techniques. It is observed that the two major modes of heat transfer, namely, conduction between the particles in the bed and convection between the flowing fluid and the particles, interact with each other. Also, in the designing of packed bed for thermal energy storage application the Biot number should be kept as low as possible so that the thermal resistance within the solid does not become dominant.
    Keywords: Heat transfer;packed-bed;thermal energy storage;conduction; convection;biot number