Salt Lake City, Utah
June 20, 2004
June 20, 2004
June 23, 2004
9.574.1 - 9.574.11
Estimation of the Average Heat Transfer Coefﬁcient for a Long Horizontal Cylindrical Fin Rod
Donald W. Mueller, Jr., Hosni I. Abu-Mulaweh Engineering Department Indiana University–Purdue University Fort Wayne Fort Wayne, IN 46805-1499, USA
The physical situation considered in this study is a horizontal, long rod of cylindrical cross-section with one end maintained at a constant elevated temperature. This paper examines the assumption that the heat transfer coefﬁcient along the rod is constant and proposes a simple approach to esti- mate an average total heat transfer coefﬁcient. The approach makes use of a published correlation for natural convection from a horizontal, isothermal cylinder and a simple model for the radiative heat transfer. A comparison is made to experimental results.
The efﬁcient transfer of heat in many devices, such as electronic components and heat exchangers, is an engineering challenge and a topic of extensive study. In many such devices, ﬁns are used to enhance the heat transfer. All ﬁns operate by increasing the surface area from which the heat trans- fer can take place; however, a wide variety of conﬁgurations and operating conditions are possible. Fins have been the topic of many studies (see e.g. references in  and ) and a typical analysis is found in many textbooks, e.g.  and . Most studies begin with the standard assumptions of Murray and Gardner as summarized in Ref. : 1. The heat ﬂow in the ﬁn and its temperature remain constant in time, i.e. steady-state. 2. The ﬁn material is homogeneous, its thermal conductivity is the same in all directions, and it remains constant. 3. The heat transfer coefﬁcient to the ﬁn is constant and uniform over the entire surface. 4. The temperature of the medium surrounding the ﬁn is uniform and constant. 5. Temperature gradients across the ﬁn cross-section may be neglected, i.e. one-dimensional. 6. The temperature at the base of the ﬁn is uniform. 7. There is no contact resistance where the base of the ﬁn joins the prime surface. 8. There are no heat sources within the ﬁn itself.
Proceedings of the 2004 American Society for Engineering Education Annual Conference & Exposition Copyright c 2004, American Society for Engineering Education
Mueller, D., & Abu-Mulaweh, H. (2004, June), Estimation Of The Average Heat Transfer Coefficient For A Long Horizontal Cylindrical Fin Rod Paper presented at 2004 Annual Conference, Salt Lake City, Utah. https://peer.asee.org/13312
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