Local free convection to non-Newtonian fluids from a horizontal, isothermal cylinder
The transfer of heat between a body surface and the motionless fluid surrounding it is perhaps one of the most naturally occurring physical phenomena. Undoubtedly interest and speculation regarding this natural or free convection behavior dates back centuries. However, as Jakob (13) reveals, it was not until 1817 when Dulong and Petit's (15) observations were published, that the precise relationship between the quantity of heat transferred and the surface-to-fluid temperature difference was established. These experimental results involved Newtonian fluids, and since that time volumes have been devoted to the subject. Only in recent years has attention been focused on the commonly encountered, yet rheologically more complex, non-Newtonian class of fluid. It is within this realm that the present investigation was directed.
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