A Geometrical Model For Thermal Conductivity

John F. Siau


The application of a cellular model equation to describe the effect of wood density upon transverse thermal conductivity indicates that the presence of bound water does not appear to affect the thermal conductivity of cell-wall substance. Good fits with the published experimental data are obtained when values of 1.0 X 10-4, 10.5 X 10-4 and 21.0 X10-4 cal/ (cm °C sec) are assumed for air and cell-wall substance perpendicular to and parallel to the fiber axis. An empirical regression equation is presented that yields results nearly equal to those of the theoretical model-based equation.

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