Investigation into the Effects of Nanoparticle Size and Channel Depth on the Thermophysical Properties of Water Nanofluids in the Nanochannel Using Molecular Dynamics Simulation

In this research, an in-house code which uses the molecular dynamics method to study the flow of different nanofluids in the copper nanochannel and computes the thermo-physicals properties has been developed. The flow of nanofluids has been studied from hydro-thermally viewpoint and temperature jump at the wall has been applied. Parametric study to consider the effect of different parametric such as nanoparticle size channel and depth of them on the flow and its properties has been done. The results show that increasing the size of nanoparticles will decrease the viscosity and thermal conductivity; but it will increase the specific heats of nanofluids. Also, the thermal conductivity increases as a function of the nanochannel depth when the channel depth is increased. Although, the nanochannel dimension has no effect on the other thermo-physical properties of nanofluids. Moreover, the interaction and tendency between water and nanoparticles were studied using radial distribution function (RDF).