An Experimental Investigation on the Thermal Conductivity of Consolidated Porous Materials

Abstract

The thermal conductivity of porous materials consisting of the solid-fluid phase system, particularly the effect of porosity and of the saturating fluid occupying the pore space, has been investigated. Thirteen sand-stones and six fire bricks having different porosity were selected as typical examples of porous materials, and the experiment was carried out on these samples. A comparison method was used for measurement. Data were reported showing the variation of thermal conductivity relative to the porosity and conductivity of the saturating fluid. The variation according to the porosity of the samples is in complete agreement with the general formula previously derived by Sugawara and Yoshizawa.

Thermal conductivity of fluid-saturated rocks

“…The thermal conductivity of such a rock depends on the conductivity of its mineral components, the conductivity of the pore fluids, and the extent and geometry of the pore space. Various empirical equations have been proposed to relate the thermal conductivity to these p~meters (see Somerton 1958;Sugawara & Yoshizawa 1962), and some attempts have been made to predict the conductivity theoretically (i.e., Walsh & Decker 1966). The purpose of this paper is to provide the basis for a systematic approach to the prediction of the thermal conductivity of fluid-saturated porous rocks.…”

Thermal conductivities of three-dimensionally woven fabric composites

“…Hugo Fricke stretched the electric conductivity modeling to disperse systems in 1924 which can be treated similarly to thermal conductivity and Bruggeman extended this approach to thermal conductivity in 1935 [7,8]. Sugawara and Yoshozawa and Brailsford and Major published their research on thermal conductivity of aggregates and porous materials [9,10]. One early transfer of these results to unidirectional reinforced plastics for longitudinal and transverse thermal conduction was accomplished by Thornburg and Pears in 1965 [11].…”

T2VOC user`s guide

“…In general, h is a complex function of these parameters, and researchers have developed theoretical (Walsh and Decker, 1966;Beck, 1976;Zimmerman, 1989) and empirical (Somerton, 1958;Sugawara and Yoshizawa, 1962;Somerton et al, 1973;1974) methods for predicting h. One method for estimating the overall thermal conductivity is known as the parallel model (Bejan, 1984). With this model, the overall thermal conductivity is a combination of the individual conductivities…”