scholarly journals A comparative study of the DSBGK and DVM methods for low-speed rarefied gas flows

2019 ◽  
Vol 181 ◽  
pp. 143-159 ◽  
Author(s):  
Minh Tuan Ho ◽  
Jun Li ◽  
Lei Wu ◽  
Jason M. Reese ◽  
Yonghao Zhang
Keyword(s):  
Comparative Study ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Low Speed ◽  
Rarefied Gas Flows

scholarly journals A comparative study of discrete velocity methods for low-speed rarefied gas flows

2018 ◽  
Vol 161 ◽  
pp. 33-46 ◽  
Author(s):  
Peng Wang ◽  
Minh Tuan Ho ◽  
Lei Wu ◽  
Zhaoli Guo ◽  
Yonghao Zhang
Keyword(s):  
Comparative Study ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Low Speed ◽  
Discrete Velocity ◽  
Rarefied Gas Flows

scholarly journals Comparative study of the discrete velocity and the moment method for rarefied gas flows

2019 ◽  
Author(s):  
Weiqi Yang ◽  
Xiao-Jun Gu ◽  
David. Emerson ◽  
Yonghao Zhang ◽  
Shuo Tang
Keyword(s):  
Comparative Study ◽  
Moment Method ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Discrete Velocity ◽  
Rarefied Gas Flows ◽  
The Moment

scholarly journals A Thermal Lattice Boltzmann Model for Micro/Nano-Flows

2008 ◽  
Author(s):  
Y.-H. Zhang ◽  
X.-J. Gu ◽  
R. W. Barber ◽  
D. R. Emerson
Keyword(s):  
Lattice Boltzmann ◽  
Rarefied Gas ◽  
Computational Cost ◽  
Distribution Functions ◽  
Lattice Boltzmann Model ◽  
Gas Flows ◽  
Low Speed ◽  
Rarefied Gas Flows ◽  
Thermal Lattice Boltzmann ◽  
Boltzmann Model

With the development of micro/nano-devices, low speed rarefied gas flows have attracted significant research interest where successful numerical methods for traditional high speed flows, including the direct simulation Monte Carlo method, become computationally too expensive. As the Knudsen number can be up to the order of unity in a micro/nano flow, one approach is to use continuum-based methods including the Navier-Stokes-Fourier (NSF) equations, Burnett/super Burnett equations, and moment models. Limited success has been achieved because of theoretical difficulties and/or numerical problems. The recently developed lattice Boltzmann equation (LBE) offers a fundamentally different approach which is close to kinetic methods but with a significantly smaller computational cost. However, success of LBE methods for rarefied gas motion has been mainly on isothermal flows. In this paper, thermal rarefied gas flows are investigated. Due to the unique features of micro/nano flows, a simplified thermal lattice Boltzmann model with two distribution functions can be used. In addition, kinetic theory boundary conditions for the number density distribution function can be extended to construct a thermal boundary condition. The model has been validated in the slip-flow regime against solutions of the NSF equations for shear and pressure driven flows between two planar plates. It is shown that the present thermal LBE model can capture some unique flow characteristics that the NSF equations fail to predict. The present work indicates that the thermal lattice Boltzmann model is a computationally economic method that is particularly suitable to simulate low speed thermal rarefied gas flows.

Comparative study of various approaches for modeling transitional hypersonic rarefied gas flows over blunt bodies

2012 ◽  
Author(s):  
I. G. Brykina ◽  
B. V. Rogov ◽  
G. A. Tirskiy ◽  
V. A. Titarev ◽  
S. V. Utyuzhnikov
Keyword(s):  
Comparative Study ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Rarefied Gas Flows ◽  
Blunt Bodies

Modeling of low-speed rarefied gas flows using a combined ES-BGK/DSMC approach

Vacuum ◽  
2010 ◽  
Vol 85 (2) ◽  
pp. 115-119 ◽  
Author(s):  
Natalia Gimelshein ◽  
Sergey Gimelshein ◽  
Nathaniel Selden ◽  
Andrew Ketsdever
Keyword(s):  
Rarefied Gas ◽  
Gas Flows ◽  
Low Speed ◽  
Rarefied Gas Flows

Comparative study between computational and experimental results for binary rarefied gas flows through long microchannels

2010 ◽  
Vol 9 (6) ◽  
pp. 1103-1114 ◽  
Author(s):  
Lajos Szalmas ◽  
Jeerasak Pitakarnnop ◽  
Sandrine Geoffroy ◽  
Stephane Colin ◽  
Dimitris Valougeorgis
Keyword(s):  
Comparative Study ◽  
Rarefied Gas ◽  
Experimental Results ◽  
Gas Flows ◽  
Rarefied Gas Flows

Shock polar investigation in supersonic rarefied gas flows over a circular cylinder

2021 ◽  
Vol 33 (5) ◽  
pp. 052006
Author(s):  
Hassan Akhlaghi ◽  
Ehsan Roohi ◽  
Abbas Daliri ◽  
Mohammad-Reza Soltani
Keyword(s):  
Circular Cylinder ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Rarefied Gas Flows
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