Enlightened by the fractal character of natural honeycomb

a novel biomimetic comby fractal microchannel (BCFM) network was designed and fabricated by micromachining.Optimized parameters were presented by the use of the microchannel heat sinks porous medium model. Provided the channel cross-section

convection heat transfer coefficient

and temperature difference were same

the heat removal capacity of BCFM was over 5 times as that of traditional parallel microchannels.Given the total quantity of heat transfer

the pump power required in BCFM network was as low as one tenth of that in traditional parallel microchannels

neglecting the bifurcate and confluent flow effects.Experimental results of deionized water laminar convective heat transfer showed that

the BCFM network had higher mean Nusselt number and lower pressure drop than traditional parallel microchannels. The BCFM network could be used not only in electronics cooling

but also in micro structure designs

e.g.

polar plate of micro PEM

micro mixer

and micro chemical reactor.