Heat Sinks: Circular Annular Fins

Develop a natural convection model for radial fin, circular annular heat sinks with isothermal or isoflux boundary conditions. Incorporate non-isothermal fin effects. Include an inter-fin radiation model. Models are programmed in Maple, Mathematica, C and CGI for use as a PC-based tool or as an interactive WEB-based tool

The heat sink geometry is specified using 5 parameters, including inner and outer diameter, fin thickness and spacing and the total number of fins. The heat sink is subdivided into an inner and outer region, where the inner region consists of a combination of boundary layer and fully developed flow and the outer region is composed of low Rayleigh flow conduction and boundary. The various models are combined using an approach introduced by Churchill and Usagi for blending asymptotic solutions.

Wang, C.S., Yovanovich, M.M. and Culham, J.R., 1999, "General Model for Natural Convection: Application to Annular-Fin Heat Sinks," ASME Journal of Electronic Packaging, Vol. 121, No. 1, pp. 44 - 49.

NSERC Operating Grant Materials and Manufacturing Ontario