Thermal Creep Flow of Helium Gas at Cryogenic Temperatures

2nd International Conference on Mathematical Modeling in Physical Sciences 2013

物理学;数学

Babac, G.^1,2 ; Reese, J.M.^2

Institute of Energy, Istanbul Technical University, Maslak-Istanbul 34469, Turkey^1

Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow G1 1XJ, United Kingdom^2

关键词: Cryogenic temperatures;    Density variations;    Molecular dynamics simulations;    Nano channels;    Pressure differences;    Temperature differences;    Thermal creep;    Thermal creep flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/490/1/012045/pdf
DOI  :  10.1088/1742-6596/490/1/012045

来源: IOP

【 摘 要 】

We present a molecular dynamics (MD) simulation of nanoscale gas flow due to thermal creep at cryogenic temperatures. Helium is considered because its low liquefying temperature allows a wide range of cryogenic analysis. The thermal creep flow along a nanochannel is generated by applying temperature differences along the channel. Pressure and density variations are measured at various rarefaction conditions, covering the slip flow to the free molecular regimes. Thermo molecular pressure difference (TMPD) values are also calculated. Our results are compared with those in the literature.