Employing the (SWCNTs-MWCNTs)/H2O nanofluid and topology structures on the microchannel heatsink for energy storage: A thermal case study

Abstract

The present study investigated the increase of heat transfer rate of the microchannel (heatsink) with high heat flux using topology structures and CNTs nanofluids. The heat transfers in the heatsink were studied using a three-dimensional finite volume method (FVM). Four nature-inspired topology structures were used: snowflake shape, honeycomb-shaped, ternate veiny, and spider netted, and their results were compared with straight microchannel heatsink (MHS). For testing the effect of nanoparticle concentration and type on heat transfer of heatsinks, two water-based nanofluids (SWCNT-Water) and (MWCNT -Water) were used. The temperature and pressure contours related to the proposed designs and two nanofluids were presented. The spider netted model had the highest heat transfer coefficient and the highest-pressure changes compared to other designs. For Reynolds number 550, the heat transfer coefficient and pump power (Pp) increased by 56.1% and 46.1%, respectively, when using SWCNT- H2O nanofluid. Based on the thermo-hydraulic performance of the models, spider netted increased heatsink performance by an average of 50.2%. The results also showed that nanofluids with a concentration of 5% significantly increase the heat transfer coefficient and pump power in the heatsink.