DSMC simulation of rarefied gas mixtures flows driven by arrays of absorbing plates

Aldo Frezzotti; Gian Pietro Ghiroldi; Livio Gibelli; Antonio Bonucci

doi:10.1016/j.vacuum.2013.12.004

DSMC simulation of rarefied gas mixtures flows driven by arrays of absorbing plates

Aldo Frezzotti^*, Gian Pietro Ghiroldi, Livio Gibelli, Antonio Bonucci

^*Corresponding author for this work

School of Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Gas flows induced by arrays of absorbing surfaces of various shapes are met in several vacuum technology devices, like NEG or cryogenic pumps. In order to obtain a simplified model of low pressure gas dynamics driven by surface absorption, flows of rarefied gas binary mixtures past arrays of absorbing plates are studied by numerical solution of a system of coupled and spatially two-dimensional Boltzmann equations. The overall absorption rate is obtained as a function of problem parameters which include the characteristic flow Knudsen number and wall absorption probabilities. Particular attention is devoted to mixtures flows in which one of the components is present in small amounts and it is weakly absorbed.

Original language	English
Pages (from-to)	57-67
Number of pages	11
Journal	Vacuum
Volume	103
DOIs	https://doi.org/10.1016/j.vacuum.2013.12.004
Publication status	Published - 1 May 2014

Keywords / Materials (for Non-textual outputs)

Condensation
Mixtures
Rarefied gases
Surface absorption

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10.1016/j.vacuum.2013.12.004

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title = "DSMC simulation of rarefied gas mixtures flows driven by arrays of absorbing plates",

abstract = "Gas flows induced by arrays of absorbing surfaces of various shapes are met in several vacuum technology devices, like NEG or cryogenic pumps. In order to obtain a simplified model of low pressure gas dynamics driven by surface absorption, flows of rarefied gas binary mixtures past arrays of absorbing plates are studied by numerical solution of a system of coupled and spatially two-dimensional Boltzmann equations. The overall absorption rate is obtained as a function of problem parameters which include the characteristic flow Knudsen number and wall absorption probabilities. Particular attention is devoted to mixtures flows in which one of the components is present in small amounts and it is weakly absorbed.",

keywords = "Condensation, Mixtures, Rarefied gases, Surface absorption",

author = "Aldo Frezzotti and Ghiroldi, {Gian Pietro} and Livio Gibelli and Antonio Bonucci",

year = "2014",

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doi = "10.1016/j.vacuum.2013.12.004",

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journal = "Vacuum",

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T1 - DSMC simulation of rarefied gas mixtures flows driven by arrays of absorbing plates

AU - Frezzotti, Aldo

AU - Ghiroldi, Gian Pietro

AU - Gibelli, Livio

AU - Bonucci, Antonio

PY - 2014/5/1

Y1 - 2014/5/1

N2 - Gas flows induced by arrays of absorbing surfaces of various shapes are met in several vacuum technology devices, like NEG or cryogenic pumps. In order to obtain a simplified model of low pressure gas dynamics driven by surface absorption, flows of rarefied gas binary mixtures past arrays of absorbing plates are studied by numerical solution of a system of coupled and spatially two-dimensional Boltzmann equations. The overall absorption rate is obtained as a function of problem parameters which include the characteristic flow Knudsen number and wall absorption probabilities. Particular attention is devoted to mixtures flows in which one of the components is present in small amounts and it is weakly absorbed.

AB - Gas flows induced by arrays of absorbing surfaces of various shapes are met in several vacuum technology devices, like NEG or cryogenic pumps. In order to obtain a simplified model of low pressure gas dynamics driven by surface absorption, flows of rarefied gas binary mixtures past arrays of absorbing plates are studied by numerical solution of a system of coupled and spatially two-dimensional Boltzmann equations. The overall absorption rate is obtained as a function of problem parameters which include the characteristic flow Knudsen number and wall absorption probabilities. Particular attention is devoted to mixtures flows in which one of the components is present in small amounts and it is weakly absorbed.

KW - Condensation

KW - Mixtures

KW - Rarefied gases

KW - Surface absorption

UR - http://www.scopus.com/inward/record.url?scp=84892172081&partnerID=8YFLogxK

U2 - 10.1016/j.vacuum.2013.12.004

DO - 10.1016/j.vacuum.2013.12.004

M3 - Article

AN - SCOPUS:84892172081

SN - 0042-207X

VL - 103

SP - 57

EP - 67

JO - Vacuum

JF - Vacuum

ER -

DSMC simulation of rarefied gas mixtures flows driven by arrays of absorbing plates

Abstract

Keywords / Materials (for Non-textual outputs)

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