Parametric study on the thermal performance of double-layered microchannel heat sinks

In this paper, a three-dimensional solid-fluid conjugatemodel was employed to study thermal performance in ananofluid-cooled, silicon-based double-layeredmicrochannel heat sink (DL-MCHS). The governingdifferential equations are solved using finite volume methodin OpenFOAM. An extension of the available solver,chtMultiRegionSimpleFoam with the assumption ofconstant thermophysical properties was employed. Thenumerical solver was validated against experimental dataextracted from the previous experimental studies. Twodesign variables: aspect ratio and channel width wereinvestigated at a fixed pumping power to search for aminimum of thermal resistance. Results of this study showthat at a constant pumping power, double-layeredmicrochannel heat sinks with higher aspect ratio andchannel width have better thermal performance.