Phase Change Enhancement Using Nanostructured Surfaces: A Molecular Dynamics Study

Phase change processes have been used in heat transfer industries for decades. However, the heat transfer rate enhancement of the surfaces is still a challenging issue forthe researchers. In this path, emerging nanostructured surfaces have shown great potentials. We demonstrate that using nanostruetured surfaces in the condensationprocesses enhances the heat transfer behavior of the fluid through interfacial contact area increase. In the present study molecular dynamics simulation was have beenemployed to monitor the atomic behavior of the system components at nanoscale. The argon liquid is considered as the working fluid a11d the copper surfaces as phase change site. The effect of different nanostructures arrangement has been investigated by changing the number of pillars sitting on the condensation plate. As a result, increasing the contact area of the surface leads to faster energy transfer and lower temperature peaks. By plotting the number density distribution of argon atoms at different times of the sitnulation period, we obtain a better understanding of the system’s phase change process at the nanoscale.

کلیدواژه ها:

Nanostmctured surfaces ، Phase change ، Condensation. Molecular dynamics simulation