Abstract
The effective thermal conductivity for several loose particulate insulation systems has been measured in the temperature range from 273 K–900 K and the results compared to those predicted from three different models. The measured thermal conductivities increase with temperature. This is accounted for in terms of increased conduction by the fluid (air) and the radiative heat transfer through the media although the latter mode of heat transfer is relatively suppressed in materials containing finer particles. The model due to Zumbrunnen et al. [1] was found to predict values that closely agreed with the experimental values.
Similar content being viewed by others
References
D. A. Zumbrunnen, R. Viskanta and F. P. Incropera, Int. J. Heat Mass Transfer 29 (1986) 275.
J. S. M. Botterill, A. G. Salway and Y. Yeoman, Int. J. Heat Mass Transfer 32 (1989) 595.
S. Torquato, Rev. Chem. Engng 4 (1987) 151.
A. S. Wagh, J. Mater. Sci. 28 (1993) 3715.
R. N. Pande and D. R. Chaudhary, Pramana 23 (1984) 599.
R. N. Pande, V. Kumar and D. R. Chaudhary, ibid 22 (1984) 63.
G. V. Samsonov, (ed), “The Oxide Handbook”, (IFI/Plenum, New York, 1973).
P. Furmanski, Int. J. Heat Mass Transfer 35 (1992) 3047.
G. K. Batchelor and R. W. O'Brien. Proc. R. Soc. Lond. A.33 355 (1977) 313.
R. Singh, K. J. Singh and D. R. Chaudhary, J. Phys. D: Appl. Phys. 28 (1995) 1573.
L. S. Verma, A. K. Shrotriya, R. Singh and D. R. Chaudhary, ibid 24 (1991) 1729.
T. H. Baurer, Int. J. Heat Mass Transfer 36 (1993) 4181.
D. R. Shonnard and S. Whitaker, ibid 32 (1989) 503.
J. H. Blackwell, J. Appl. Phys. 25 (1954) 137.
J. J. Healy, J. C. De Groot and J. Kestin, Physica B + C 82 (1976) 392.
A. K. Bhattacharya, J. Amer Ceram.Soc. 74 (1991) 2113.
A. Sala, “Radiant Properties of Materials: Tables of radiant values for black body and real materials” (Elsevier, Amsterdam, 1986).
K. Misra, A. K. Shrotriya, R. Singh and D. R. Chaudhary, J. Phys. D: Appl. Phys. 27 (1994) 732.
E. A. Fitzpatrick, “Soils Their Formation, classification and distribution” (Longmans, London, 1980) p. 20.
G. W. C. Kaye and T. H. Laby, “Table of Physical and Chemical Constants and some Mathematical Functions” 5th Edn (Longmans, London 1986).
A. V. Luikov, “Heat and Mass Transfer” (English Translation) (Mir Publishers, Moscow, 1980).
A. D. Brailsford and K. G. Major, Brit. J. Appl. Phys. 15 (1964) 313.
B. Aduda, MSc Thesis Nairobi University, 1987.
R. Kinyanjui, MSc Thesis Egerton University, 1995.
F. Nyongesa, MSc Thesis Nairobi University, 1994.
A. K. Shrotriya, Indian J. Pure and Appl. Phys. 29 (1991) 339.
N. V. Tsederberg, “Thermal Conductivity of Gases and Liquids” (Translated by Scripta Massachusetts, D. Cess (ed) The MIT Press, Cambridge MA, 1965) p. 67.
A. J. Helte, Appl. Phys. 73 (1993) 7167.
E. Y. Litovsky and M. Shapiro, J. Amer Ceram. Soc. 75 (1992) 3425.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Aduda, B.O. Effective thermal conductivity of loose particulate systems. JOURNAL OF MATERIALS SCIENCE 31, 6441–6448 (1996). https://doi.org/10.1007/BF00356246
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00356246