Living Reference Work Entry

Encyclopedia of Microfluidics and Nanofluidics

pp 1-14

Date: Latest Version

DSMC Simulations of Nanoscale and Microscale Gas Flow

  • Ehsan RoohiAffiliated withHigh Performance Computing Laboratory (HPC Lab), Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad Email author 


DSMC:​ Direct simulation Monte Carlo; IP:​ Information preservation; Kn:​ Knudsen number; NS:​ Navier-Stokes


Direct simulation Monte Carlo (DSMC) method is a statistical approach widely employed for simulating rarefied micro-/nanoflows. DSMC is considered as a particle method in which each particle represents a large bulk of real gas molecules. It is proved that DSMC solution is as accurate as the solution of Boltzmann equation over the whole range of the Knudsen number.


Micro-/nano-electromechanical systems (MEMS/NEMS) are widely utilized in many practical applications including mechanical engineering. The study of gaseous flow in micro- and nanoscales has been an interesting topic of researches in recent years. Classification of the gaseous flow regimes is usually performed according to the Knudsen (Kn) number. Gaseous flow at Kn < 0.001 is termed as continuum regime where the basic NS equations with no-slip/jump boundary conditions are valid in this regime. Gaseo ...

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