Sensible heat transfer from the fowl: boundary-layer resistance of a model fowl.
1. The sensible heat transfer from a physical model of an adult fowl was investigated for the range of air speeds encountered in poultry houses in the United Kingdom, 0.09 to 2.7 m/s, equivalent to Reynolds numbers (Re) from 10(3) to 3 + 10(4). The Grashof number (Gr) range studied was from 6 + 10(6) to 10(7). 2. The pooled results were analysed to give a relationship between the Nusselt number (Nu) and Re in the mixed convective regime of : Nu = 2 + 0.79 Re0 48 A combination of Nu, Re and Gr did not produce a better fit to the results. 3. Enhancement of heat transfer observed when Re was close to 10(3) was probably caused by an interaction between the forced and natural air currents.
D000818:Animals; D001833:Body Temperature Regulation; D002645:Chickens / Q000502:physiology*; D005241:Feathers / Q000502:physiology; D008954:Models, Biological