Variation of Momentum Accommodation Coefficients with Molecular Mass and Structure

Michael Martin; Tathagata Acharya

doi:10.2514/6.2019-0623

Variation of Momentum Accommodation Coefficients with Molecular Mass and Structure

Michael Martin, Tathagata Acharya

Computational Science

Research output: Contribution to conference › Paper › peer-review

2 Scopus Citations

Abstract

A disk spindown experiment allows measurement of tangential momentum accommodation coefficients (TMAC) of different gases and material combinations in a consistent manner. A range of gases: monoatomic, diatomic, and triatomic are tested on aluminum. The results confirm previous experimental results that show a reduction in tangential momentum accommodation coefficients with increasing molecular masses of gases. In addition, the results reveal a previously unreported phenomenon: that the tangential momentum accommodation coefficient is also a function of molecular structure of gases.

Original language	American English
DOIs	https://doi.org/10.2514/6.2019-0623 https://doi.org/10.2514/6.2019-0623
State	Published - 2019
Event	AIAA Scitech Forum, 2019 - San Diego, United States Duration: 7 Jan 2019 → 11 Jan 2019

Conference

Conference	AIAA Scitech Forum, 2019
Country/Territory	United States
City	San Diego
Period	7/01/19 → 11/01/19

Bibliographical note

Publisher Copyright:
© 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

NREL Publication Number

NREL/CP-2C00-74479

Keywords

gas flow
gases
momentum

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Cite this

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title = "Variation of Momentum Accommodation Coefficients with Molecular Mass and Structure",

abstract = "A disk spindown experiment allows measurement of tangential momentum accommodation coefficients (TMAC) of different gases and material combinations in a consistent manner. A range of gases: monoatomic, diatomic, and triatomic are tested on aluminum. The results confirm previous experimental results that show a reduction in tangential momentum accommodation coefficients with increasing molecular masses of gases. In addition, the results reveal a previously unreported phenomenon: that the tangential momentum accommodation coefficient is also a function of molecular structure of gases.",

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author = "Michael Martin and Tathagata Acharya",

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language = "American English",

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AU - Martin, Michael

AU - Acharya, Tathagata

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AB - A disk spindown experiment allows measurement of tangential momentum accommodation coefficients (TMAC) of different gases and material combinations in a consistent manner. A range of gases: monoatomic, diatomic, and triatomic are tested on aluminum. The results confirm previous experimental results that show a reduction in tangential momentum accommodation coefficients with increasing molecular masses of gases. In addition, the results reveal a previously unreported phenomenon: that the tangential momentum accommodation coefficient is also a function of molecular structure of gases.

KW - gas flow

KW - gases

KW - momentum

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DO - 10.2514/6.2019-0623

M3 - Paper

AN - SCOPUS:85083943967

T2 - AIAA Scitech Forum, 2019

Y2 - 7 January 2019 through 11 January 2019

ER -

Variation of Momentum Accommodation Coefficients with Molecular Mass and Structure

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

Access to Document

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