Biomaterial Database

Effects of air velocity on convective and radiant heat transfer from domestic fowls at environmental temperatures of 20 degrees and 30 degrees C. 1985

M A Mitchell

The effects of air movement upon sensible heat loss from individual birds at ambient temperatures of 20 degrees and 30 degrees C were determined by partitional calorimetry using a newly developed wind tunnel calorimeter. The relationship between area specific convective heat loss (W/m2) and air velocity (in the range 0.3 to 1.05 m/s) was described by y = 56.5 + 16.9 log x at an air temperature of 20 degrees C, but at 30 degrees C convective heat loss increased linearly with air speed (y = 11.8 + 40.1 x). At 20 degrees C sensible heat exchange (W/m2) was related to air velocity by y = 70.6 exp (0.099 x) and by y = 41.4 + 25.9 x at 30 degrees C, the proportional increase with air speed being greater at the higher temperature. The differences in the effects of air movement on convective cooling and sensible heat loss at 20 degrees and 30 degrees C reflect the thermoregulatory responses of the birds, induced by the thermal demands of the environment.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D001831	Body Temperature	The measure of the level of heat of a human or animal.	Organ Temperature,Body Temperatures,Organ Temperatures,Temperature, Body,Temperature, Organ,Temperatures, Body,Temperatures, Organ
D001833	Body Temperature Regulation	The processes of heating and cooling that an organism uses to control its temperature.	Heat Loss,Thermoregulation,Regulation, Body Temperature,Temperature Regulation, Body,Body Temperature Regulations,Heat Losses,Loss, Heat,Losses, Heat,Regulations, Body Temperature,Temperature Regulations, Body,Thermoregulations
D002151	Calorimetry	The measurement of the quantity of heat involved in various processes, such as chemical reactions, changes of state, and formations of solutions, or in the determination of the heat capacities of substances. The fundamental unit of measurement is the joule or the calorie (4.184 joules). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
D002645	Chickens	Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA.	Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D000392	Air Movements	The motion of air currents.	Air Movement,Movement, Air,Movements, Air
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures