โ Scribed by R.M. Gatenby
No coin nor oath required. For personal study only.
The conductive heat loss from a sheep sitting on grass was measured with soil heat flux plates and an electrical model was built to study the heat loss to other substrates.
The thermal resistance of the fleece on the model was estimated as 2.2 s cm -1 per cm fleece depth. The resistance found for the live sheep was 50% less, probably due to preferential heat flow from the parts of the body with little fleece covering, together with disturbance of the fleece due to breathing. The resistance of thin layers of several dry insulation materials were, per unit depth, similar in magnitude to the fleece resistance, but a six-fold reduction in resistance was observed when sawdust was wetted. The nature of the substrate and the duration of each sitting period had only a secondary effect on the rate of conduction.
The measurements indicate that heat loss by conduction from a sheep living on cold, poorly-insulated ground may approach 30% of its minimum heat production.
๐ SIMILAR VOLUMES
## Abstract An exact solution of heat conduction from two spheres is obtained using the bispherical coordinates system. The two spheres may be of different diameters and may be located at any distance from each other. The solution is given in terms of the temperature distribution and the local and
In the present work the single-phase-lagging heat conduction model is re-derived analytically from the Boltzmann transport equation. In contrast to the Maxwell-Cattaneo law (CV model), it is Galilean invariant in the moving media. Based on this model, the governing equation of the microscale heat co