Effect of different parameters on the heat transfer coefficient of silicon and carbon nanotubes

Abstract

One of the most important properties of nanomaterials is their thermal conductivity, which is particularly needed by researchers in electronic equipment. In this research, the thermal conductivity properties of carbon nanotubes were first investigated. Next, the thermal conductivity of silicon nanotubes was investigated using the molecular dynamics method. For this purpose, five important effects were investigated: the effect of changing the potential function, the effect of changing the length of the heat bath region, the effect of changing the length, the effect of changing diameter, and the effect of changing the temperature of the nanotube. The results indicated that by changing the potential function, the thermal conductivity was decreased. Additionally, the result demonstrated that by increasing the length of the heat bath region, the thermal conductivity of silicon nanotubes was decreased, while in carbon nanotubes, the thermal conductivity was increased. Also, in both carbon nanotubes and silicon nanotubes, increasing temperature between 100 K and 300 K decreased kappa coefficient. On the other hand, increasing diameters, increased the kappa coefficient. Finally, as the length of the nanotubes was increased, no significant change was observed in the kappa coefficient of silicon nanotubes, while in carbon nanotubes, the kappa coefficient was increased. © 2021 Elsevier Ltd