A correlation for natural convection heat transfer from inclined plate-finned heat sinks

Date

2013-03-01

Author

MEHRTASH, Mehdi
Tarı, İlker

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Steady-state natural convection heat transfer from inclined plate-finned heat sinks to air is numerically investigated by using an experimentally validated model. The heat sinks with parallel arrangement of uniform rectangular cross section plate fins are inclined from the vertical in both forward and backward directions in order to investigate the effect of inclination on convection. Our previously validated numerical model for vertically oriented heat sinks is directly used without changing any model parameters, but only by varying the direction of the gravitational acceleration to create the effect of inclination. The flow and temperature fields are resolved using a finite volume computational fluid dynamics code. Performing a large number of simulations for the heat sink base inclination angles of +/- 4 degrees, +/- 10 degrees, +/- 20 degrees, +/- 30 degrees, +/- 45 degrees, +/- 60 degrees, -65 degrees, -70 degrees, +/- 75 degrees, +/- 80 degrees, +/- 85 degrees, +/- 90 degrees from the vertical, the dependence of the convective heat-transfer rate to the inclination angle and Rayleigh number is investigated. Scale analyses are performed in order to generalize estimates for the convection heat-transfer rates. A single correlation is suggested and shown to be valid for a very wide range of angles from -60 degrees (upward) to +/- 80 degrees (downward) in a wide range of Rayleigh numbers from 0 to 2 x 10(8).

Subject Keywords

Correlation, Electronics cooling, Inclined heat sink, Plate-fin array, Natural convection

URI

https://hdl.handle.net/11511/47045

Journal

APPLIED THERMAL ENGINEERING

DOI

https://doi.org/10.1016/j.applthermaleng.2012.10.043

Collections

Department of Mechanical Engineering, Article

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Citation Formats

M. MEHRTASH and İ. Tarı, “A correlation for natural convection heat transfer from inclined plate-finned heat sinks,” APPLIED THERMAL ENGINEERING, pp. 1067–1075, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47045.