Journal of Statistical Physics, Volume (162), No (3), Year (2015-12) , Pages (712-726)

Title : ( Capturing non-equilibrium effects of micro/nano scale gaseous flow using a novel lattice Boltzmann model )

Authors: Ali Norouzi , Javad Abolfazli Esfahani ,

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In this study, gaseous flow through a micro/nano-channel is investigated via a novel two relaxation time lattice Boltzmann method (TRT-LBM). In this method, the slip velocity at the fluid-solid interface is realized by defining the free relaxation parameter. Furthermore, in order to capture the non-linear phenomena associated with the Knudsen layer, the wall function correction is employed. To this respect, different available wall functions are implemented. The objective of the study is to provide a comparative study on the accuracy, range of applicability and computational efficiency of these wall functions in a wide range of Knudsen numbers. The results of the present study are compared against direct simulation Mont Carlo (DSMC) and information preservation (IP) data. It is found that only a few of the implemented wall functions are capable of predicting the flow behavior with reasonable accuracy, particularly when the Knudsen number lies in the transition flow regime.

Keywords

, Micro/nano, channel; two relaxation time lattice Boltzmann method; Knudsen layer; wall
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@article{paperid:1053087,
author = {Norouzi, Ali and Abolfazli Esfahani, Javad},
title = {Capturing non-equilibrium effects of micro/nano scale gaseous flow using a novel lattice Boltzmann model},
journal = {Journal of Statistical Physics},
year = {2015},
volume = {162},
number = {3},
month = {December},
issn = {0022-4715},
pages = {712--726},
numpages = {14},
keywords = {Micro/nano-channel; two relaxation time lattice Boltzmann method; Knudsen layer; wall function},
}

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%0 Journal Article
%T Capturing non-equilibrium effects of micro/nano scale gaseous flow using a novel lattice Boltzmann model
%A Norouzi, Ali
%A Abolfazli Esfahani, Javad
%J Journal of Statistical Physics
%@ 0022-4715
%D 2015

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