Experimental/Computational Approach to Accommodation Coefficients and its Application to Noble Gases on Aluminum Surface (Preprint)
A technique is proposed to assess gas-surface accommodation coefficients. The technique utilizes the fact that radiometric forces exerted on heated objects immersed in rarefied gases are governed by the interaction of gas molecules with the surface. In the present implementation, it connects measure...
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| creator | Selden, Nathaniel Gimelshein, Natalie E Gimelshein, Sergey F Ketsdever, Andrew |
| description | A technique is proposed to assess gas-surface accommodation coefficients. The technique utilizes the fact that radiometric forces exerted on heated objects immersed in rarefied gases are governed by the interaction of gas molecules with the surface. In the present implementation, it connects measurements of radiometric forces on a heated vane in the transitional flow regime with the kinetic modeling of the flow, and derives the accommodation coefficients through the successive analysis of measured and computed results. A new combined ES-BGK / DSMC approach that allows accurate and time efficient analysis of radiometric forces on a vane in large vacuum chambers filled with rarefied gas is presented. Accommodation coefficients for the Maxwell model are estimated for argon, xenon, and helium on a machined aluminum surface, and found to be 0.81, 0.86, and 0.53, respectively.
Submitted for publication in the Journal of Physics of Fluids. |
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Submitted for publication in the Journal of Physics of Fluids.</description><subject>ACCURACY</subject><subject>ALUMINUM</subject><subject>ALUMINUM VANES</subject><subject>ARGON</subject><subject>COEFFICIENTS</subject><subject>COMBINED KINETIC APPROACH</subject><subject>EFFICIENCY</subject><subject>EXPERIMENTAL DATA</subject><subject>Fluid Mechanics</subject><subject>HELIUM</subject><subject>INTERACTIONS</subject><subject>KINETIC ENERGY</subject><subject>KINETICS</subject><subject>MAXWELLS EQUATIONS</subject><subject>Mechanics</subject><subject>MOLECULES</subject><subject>RAREFIED GASES</subject><subject>SURFACES</subject><subject>TIME SERIES ANALYSIS</subject><subject>TRANSITIONS</subject><subject>VACUUM CHAMBERS</subject><subject>WUAFRL23080532</subject><subject>XENON</subject><fulltext>true</fulltext><rsrctype>report</rsrctype><creationdate>2009</creationdate><recordtype>report</recordtype><sourceid>1RU</sourceid><recordid>eNqFi7sKAjEQRbexEPUPLKbUQlxYFCzDumolgvZLzE5wIMmEPMDeHzeovdWBe84dV6_u6TGQRZekWbdsfU4yETtpQHgfWKoHJAahFFvLw8dBy6g1KSqvCNINQIUlN6S-QXmc-W4QjjJihLIIky25bOGag5YKYXEJ6AO5tJxWIy1NxNmPk2p-6G7taTUkUn1M5DD1Yi829bbZ1c0f_QZheEdC</recordid><startdate>20090203</startdate><enddate>20090203</enddate><creator>Selden, Nathaniel</creator><creator>Gimelshein, Natalie E</creator><creator>Gimelshein, Sergey F</creator><creator>Ketsdever, Andrew</creator><scope>1RU</scope><scope>BHM</scope></search><sort><creationdate>20090203</creationdate><title>Experimental/Computational Approach to Accommodation Coefficients and its Application to Noble Gases on Aluminum Surface (Preprint)</title><author>Selden, Nathaniel ; Gimelshein, Natalie E ; Gimelshein, Sergey F ; Ketsdever, Andrew</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-dtic_stinet_ADA5063903</frbrgroupid><rsrctype>reports</rsrctype><prefilter>reports</prefilter><language>eng</language><creationdate>2009</creationdate><topic>ACCURACY</topic><topic>ALUMINUM</topic><topic>ALUMINUM VANES</topic><topic>ARGON</topic><topic>COEFFICIENTS</topic><topic>COMBINED KINETIC APPROACH</topic><topic>EFFICIENCY</topic><topic>EXPERIMENTAL DATA</topic><topic>Fluid Mechanics</topic><topic>HELIUM</topic><topic>INTERACTIONS</topic><topic>KINETIC ENERGY</topic><topic>KINETICS</topic><topic>MAXWELLS EQUATIONS</topic><topic>Mechanics</topic><topic>MOLECULES</topic><topic>RAREFIED GASES</topic><topic>SURFACES</topic><topic>TIME SERIES ANALYSIS</topic><topic>TRANSITIONS</topic><topic>VACUUM CHAMBERS</topic><topic>WUAFRL23080532</topic><topic>XENON</topic><toplevel>online_resources</toplevel><creatorcontrib>Selden, Nathaniel</creatorcontrib><creatorcontrib>Gimelshein, Natalie E</creatorcontrib><creatorcontrib>Gimelshein, Sergey F</creatorcontrib><creatorcontrib>Ketsdever, Andrew</creatorcontrib><creatorcontrib>AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE</creatorcontrib><collection>DTIC Technical Reports</collection><collection>DTIC STINET</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Selden, Nathaniel</au><au>Gimelshein, Natalie E</au><au>Gimelshein, Sergey F</au><au>Ketsdever, Andrew</au><aucorp>AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE</aucorp><format>book</format><genre>unknown</genre><ristype>RPRT</ristype><btitle>Experimental/Computational Approach to Accommodation Coefficients and its Application to Noble Gases on Aluminum Surface (Preprint)</btitle><date>2009-02-03</date><risdate>2009</risdate><abstract>A technique is proposed to assess gas-surface accommodation coefficients. The technique utilizes the fact that radiometric forces exerted on heated objects immersed in rarefied gases are governed by the interaction of gas molecules with the surface. In the present implementation, it connects measurements of radiometric forces on a heated vane in the transitional flow regime with the kinetic modeling of the flow, and derives the accommodation coefficients through the successive analysis of measured and computed results. A new combined ES-BGK / DSMC approach that allows accurate and time efficient analysis of radiometric forces on a vane in large vacuum chambers filled with rarefied gas is presented. Accommodation coefficients for the Maxwell model are estimated for argon, xenon, and helium on a machined aluminum surface, and found to be 0.81, 0.86, and 0.53, respectively.
Submitted for publication in the Journal of Physics of Fluids.</abstract><oa>free_for_read</oa></addata></record> |
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| source | DTIC Technical Reports |
| subjects | ACCURACY ALUMINUM ALUMINUM VANES ARGON COEFFICIENTS COMBINED KINETIC APPROACH EFFICIENCY EXPERIMENTAL DATA Fluid Mechanics HELIUM INTERACTIONS KINETIC ENERGY KINETICS MAXWELLS EQUATIONS Mechanics MOLECULES RAREFIED GASES SURFACES TIME SERIES ANALYSIS TRANSITIONS VACUUM CHAMBERS WUAFRL23080532 XENON |
| title | Experimental/Computational Approach to Accommodation Coefficients and its Application to Noble Gases on Aluminum Surface (Preprint) |
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