Investigating the thermal performance of a hybrid Ag-TiO2/water nanofluid in a copper porous nanochannel: Examine the meshless molecular dynamics simulation

Abstract

Nanofluids have gained significant attention due to their improved heat transfer capability compared to traditional fluids, making them promising for various applications. Adding nanoparticles to the base fluid alters its thermophysical attributes, such as thermal conductivity, viscosity, and heat transfer characteristics. Understanding the thermal behavior of hybrid nanofluids in porous nanochannels is crucial for optimizing their performance in practical applications. Therefore, this research uses molecular dynamic simulation to evaluate the thermal performance of an Ag-TiO2/water hybrid nanofluid combined with a copper porous nanochannel. The changes in parameters such as interaction energy, thermal conductivity, and heat flux were evaluated with time. Also, the effects of different atomic ratios of nanoparticles (1, 2, 3, 5 and 10 %) on mentioned thermal parameters were evaluated. Based on the findings obtained from the molecular dynamics simulation, with the passage of 10 ns, the interaction energy, thermal conductivity, and heat flux values have converged to 1.356 kcal/mol.atom, 1.717 W/m.k and 114.09 W/m2, respectively. Also, by increasing the atomic ratio of added nanoparticles to 3 %, the thermal conductivity and heat flux values have increased to numerical values of 1.83 W/m.k and 126.84 W/m2. After that, by increasing the atomic ratio of nanoparticles to 10 %, the mentioned parameters reach numerical values of 1.79 W/m.k and 120.05 W/m2.