Continuum Simulations of CNTs

My paper has been cited for the first time! It was cited by Jamali and Shogh in their paper titled "Computational fluid dynamics modeling of fluid flow and heat transfer in the central pore of carbon nanopipes".

They investigate the causes of the flow rate enhancement that has been found both experimentally and through particle simulations in nanopipes, such as CNTs. To do this they vary a range of different parameters, such as length and diameter of the pipe, properties of the fluid (such as temperature), and the liquid-wall interaction through the slip length. As expected from their use of the Navier-Stokes equations, their simulations suggest that of the parameters tested the partial slip boundary condition at the wall is the only factor that could explain the fast flow rates that have been measured in CNTs.

There have now been several studies using CFD simulations performed to replicate CNTs for various diameters. Popadic et al., Huang et al. and I have also performed CFD simulations and compared the results with MD simulations. In each case they have managed to achieve fair agreement in flow rates and/or streamwise properties of the flow. In addition to CFD simulations, there have been attempts to modifiy the classic Hagen-Poiseulle equations (Mattia et al. and Sisan and Lichter) to include some of the effects, such as the large pressure drop that occurs at the inlet and outlet of the pipe.

There have been other factors suggested to explain the higher than expected flow rates found in nanotubes, like the structure that the liquid molecules form within the pipe. These physical phenomenon are not included in CFD simulations, this suggests that the major factor that causes the high flow rates (for nanotubes above the continuum limit) is the slip at the wall.