Numerical study of graphene-platinum hybrid nanofluid in microchannel for electronics cooling

Abstract

The objective of this paper is to numerically study the heat transfer and hydrodynamic performance of a graphene-based hybrid nanofluid flowing through a microchannel for electronics cooling applications. Different concentrations of Graphene-Platinum/water hybrid nanofluid were employed as coolants. The thermophysical properties used in this study were considered to be temperature-dependent. The microchannel was modeled as a porous media. The effect of nanoparticle volume concentration on thermal resistance, pressure drop, friction factor and ratio of heat transfer coefficient to pressure drop (Figure of merit) was analyzed and the plots were generated for different Reynolds numbers of the working fluid. The results pointed out that introduction of nanoparticles resulted in the lowering of thermal resistance. However, the pressure drop and friction factor increased. Figure of merit is found to be higher for higher concentrations of hybrid nanofluids compared to base fluid water. On analyzing the results, it was understood that the utilization of Graphene-Platinum/water hybrid nanofluid through microchannels can be highly effective in the laminar region. It also suggests that this graphene based nanofluid has excellent potential as a coolant to remove excess heat from miniature electronic devices.

The hydraulic and thermal performances of rectangular and square microchannel with different hydraulic diameters cooled by graphene–platinum hybrid nanofluid

“…Maple 19.0 was selected for this study due to its efficacy and accuracy in solving problems related to heat transfer. 39 The adopted model 29 has been compared with prior experimental studies performed by Ali et al, 40 and is shown in Figure 2. It is evident from the plot that the results obtained from the numerical model and the experiments are similar.…”

“…The authors in their previous work 29 performed a numerical analysis of a rectangular microchannel with graphene–platinum (GNP–Pt/water) hybrid nanofluid as the coolant. The studies compared the performance of hybrid and non-hybrid nanofluid, different hybrid nanofluid for the selection of GNP–Pt nanofluid and then compared GNP–Pt nanofluid with different volume concentrations to investigate its thermo-hydraulic performance to obtain maximum heat transfer and minimum pressure drop which is ideal for electronic cooling applications.…”

Efficacy of parallel microchannel configurations towards hot-spot thermal management of 8-core microprocessors

“…In the case of the microchannel, the heat transfer area to volume ratio is very high, which enhances the heat transfer rates largely. 10–12 In the last few decades, many researchers have reported the flow and heat transfer characteristics of microchannel systems, 13–19 and have noted enhanced cooling calibre. Through these studies, the heat transfer characteristics of parallel microchannel cooling systems (PMCHS) have been analysed, considering various factors such as different fluids, different channel geometry and different heat fluxes.…”

Physical intuition of entropy generation in a mixed convective hybrid nanofluid flow with chemical reaction, cross‐diffusion, and transpiration

“…A few investigators 28–32 have discussed with detailed analysis of HBN. Very recently, Avinash Kumar et al 33 discussed the hybrid nanoflow characteristics for electronics cooling applications with the help of graphene–platinum. The copper nanoparticles with the suspension of radiated heat and mass flux are illustrated by Shah et al 34 The MHD HBN flow over an exponentially shrinking surface was discussed by Zainal et al 35 …”