Nanoflow over a fractal surface

Michail Papanikolaou, Michael Frank, Dimitris Drikakis

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)
108 Downloads (Pure)


This paper investigates the effects of surface roughness on nanoflows using molecular dynamics simulations. A fractal model is employed to model wall roughness, and simulations are performed for liquid argon confined by two solid walls. It is shown that the surface roughness reduces the velocity in the proximity of the walls with the reduction being accentuated when increasing the roughness depth and wettability of the solid wall. It also makes the flow three-dimensional and anisotropic. In flows over idealized smooth surfaces, the liquid forms parallel, well-spaced layers, with a significant gap between the first layer and the solid wall. Rough walls distort the orderly distribution of fluid layers resulting in an incoherent formation of irregularly shaped fluid structures around and within the wall cavities.
Original languageEnglish
Article number082001
Number of pages9
JournalPhysics of Fluids
Issue number8
Early online date1 Aug 2016
Publication statusE-pub ahead of print - 1 Aug 2016


  • nanoflows
  • molecular dynamic simulation
  • fractal surface


Dive into the research topics of 'Nanoflow over a fractal surface'. Together they form a unique fingerprint.

Cite this