Inherent Benefits In Microscale Fractal-like
Devices For Enhanced Transport Phenomena
Author(s)
D. Pence & K. Enfield
Abstract
Heat sinks with fractal-like branching networks and parallel channel networks
are compared. Fractal-like networks are embedded in disk-shaped heat sinks,
whereas parallel channel networks exist in rectangular-shaped heat sinks. The
benefit-to-cost ratio, defined as the ratio of advected energy over flow power, is
found to be a strong function of channel length and channel depth under the
constraints imposed in the present paper. The applied heat flux, heat sink area
and flow rate between heat sinks remain constant in all cases considered. The
channel spacing considered in both heat sinks is constrained by fabrication
techniques. For the present range of conditions, the benefit-to-cost ratio is
maximized for wider, deeper, and longer channels, and is always higher for the
fractal-like heat sinks. Under these condit
Keywords
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