Effects of expansion flow in nanochannels

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

8 Downloads (Pure)


In this work we use a three-dimensional Molecular Dynamics (MD) simulation method to simulate choked subsonic flows in nanochannels subject to constant wall temperature. Argon molecules have been used for the simulations. Nanochannels with several heights were considered. The flow is driven by a pressure difference between the inlet and the outlet. An expansion flow inside the channel is accompanied by a temperature drop and a sudden increase in velocity. These flow phenomena in the channel were obtained and analyzed by the calculation of local properties of the flow in a nanochannel: velocity, temperature, density and pressure profiles were calculated. Causes behind the difference between three different geometry (circular, rectangular and slit) and two different situations (isothermal and heat transfer) are analyzed and studied. The calculated velocity slip and temperature distribution are compared with analytical solutions derived from the Navier-Stokes equations. The study shows that the channel geometry has a significant effects on the fluid dynamics and on the thermodynamics behavior of the choked subsonic flows in nanochannels.
Original languageEnglish
Title of host publicationProceedings of the 3rd European Conference on Microfluidics (Microfluidics 2012), 3-5 December 2012, Heidelberg, Germany
EditorsS Colin, GL Morini, JJ Brandner
Publication statusPublished - 2012
Event3rd European Conference on Microfluidics (MicroFlu’12) - Heidelberg, Germany
Duration: 3 Dec 20125 Dec 2012
Conference number: 3


Conference3rd European Conference on Microfluidics (MicroFlu’12)
Abbreviated titleMicroFlu’12
Internet address


Dive into the research topics of 'Effects of expansion flow in nanochannels'. Together they form a unique fingerprint.

Cite this