Directional emittance of a two-dimensional scattering medium with Fresnel boundaries
The influences of the refractive index, scattering albedo, and optical sizes on the thermal radiation in a two-dimensional rectangular, isotropically scattering medium bounded by opically smooth boundaries having Fresnel reflection are considered. The complexity of formulation resulting from this sp...
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| Veröffentlicht in: | Journal of thermophysics and heat transfer 1989-07, Vol.3 (3), p.274-282 |
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| container_title | Journal of thermophysics and heat transfer |
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| creator | Wu, C. Y Sutton, W. H Love, T. J |
| description | The influences of the refractive index, scattering albedo, and optical sizes on the thermal radiation in a two-dimensional rectangular, isotropically scattering medium bounded by opically smooth boundaries having Fresnel reflection are considered. The complexity of formulation resulting from this specular resulting from this specular reflection is reduced by treating the images as effective media and by neglecting the radiation from faraway images. The problem can then be described by an integral equation (the source function) that is solved iteratively here; the method is then applied to study the directional emittance of a two- dimensional semi-infinite slab. Results show that the directional emittance is aximuthally dependent for the rectangular geometries, that the effects of the relative refractive index on the emittance depend significantly on the albedo, and that Fresnel reflection generally decreases the angular dependence of the emittance compared to free boundaries. (Author) |
| doi_str_mv | 10.2514/3.28786 |
| format | Article |
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Y ; Sutton, W. H ; Love, T. J</creator><creatorcontrib>Wu, C. Y ; Sutton, W. H ; Love, T. J</creatorcontrib><description>The influences of the refractive index, scattering albedo, and optical sizes on the thermal radiation in a two-dimensional rectangular, isotropically scattering medium bounded by opically smooth boundaries having Fresnel reflection are considered. The complexity of formulation resulting from this specular resulting from this specular reflection is reduced by treating the images as effective media and by neglecting the radiation from faraway images. The problem can then be described by an integral equation (the source function) that is solved iteratively here; the method is then applied to study the directional emittance of a two- dimensional semi-infinite slab. Results show that the directional emittance is aximuthally dependent for the rectangular geometries, that the effects of the relative refractive index on the emittance depend significantly on the albedo, and that Fresnel reflection generally decreases the angular dependence of the emittance compared to free boundaries. (Author)</description><identifier>ISSN: 0887-8722</identifier><identifier>EISSN: 1533-6808</identifier><identifier>DOI: 10.2514/3.28786</identifier><language>eng</language><publisher>Reston: American Institute of Aeronautics and Astronautics</publisher><subject>420400 - Engineering- Heat Transfer & Fluid Flow ; ALBEDO ; COHERENT SCATTERING ; DIFFRACTION ; ELECTROMAGNETIC RADIATION ; Emittance ; ENGINEERING ; EQUATIONS ; INTEGRAL EQUATIONS ; ITERATIVE METHODS ; MONTE CARLO METHOD ; OPTICAL PROPERTIES ; PHYSICAL PROPERTIES ; RADIATION TRANSPORT ; RADIATIONS ; REFRACTIVITY ; SCATTERING ; THERMAL RADIATION</subject><ispartof>Journal of thermophysics and heat transfer, 1989-07, Vol.3 (3), p.274-282</ispartof><rights>Copyright American Institute of Aeronautics and Astronautics Jul 1989</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a287t-e1cb9279324c2144137219d44769c1f7c2fffb58c711899cfe101e10022b61de3</citedby><cites>FETCH-LOGICAL-a287t-e1cb9279324c2144137219d44769c1f7c2fffb58c711899cfe101e10022b61de3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/7140424$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Wu, C. Y</creatorcontrib><creatorcontrib>Sutton, W. H</creatorcontrib><creatorcontrib>Love, T. J</creatorcontrib><title>Directional emittance of a two-dimensional scattering medium with Fresnel boundaries</title><title>Journal of thermophysics and heat transfer</title><description>The influences of the refractive index, scattering albedo, and optical sizes on the thermal radiation in a two-dimensional rectangular, isotropically scattering medium bounded by opically smooth boundaries having Fresnel reflection are considered. The complexity of formulation resulting from this specular resulting from this specular reflection is reduced by treating the images as effective media and by neglecting the radiation from faraway images. The problem can then be described by an integral equation (the source function) that is solved iteratively here; the method is then applied to study the directional emittance of a two- dimensional semi-infinite slab. Results show that the directional emittance is aximuthally dependent for the rectangular geometries, that the effects of the relative refractive index on the emittance depend significantly on the albedo, and that Fresnel reflection generally decreases the angular dependence of the emittance compared to free boundaries. (Author)</description><subject>420400 - Engineering- Heat Transfer & Fluid Flow</subject><subject>ALBEDO</subject><subject>COHERENT SCATTERING</subject><subject>DIFFRACTION</subject><subject>ELECTROMAGNETIC RADIATION</subject><subject>Emittance</subject><subject>ENGINEERING</subject><subject>EQUATIONS</subject><subject>INTEGRAL EQUATIONS</subject><subject>ITERATIVE METHODS</subject><subject>MONTE CARLO METHOD</subject><subject>OPTICAL PROPERTIES</subject><subject>PHYSICAL PROPERTIES</subject><subject>RADIATION TRANSPORT</subject><subject>RADIATIONS</subject><subject>REFRACTIVITY</subject><subject>SCATTERING</subject><subject>THERMAL RADIATION</subject><issn>0887-8722</issn><issn>1533-6808</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><recordid>eNpt0UFLHTEQB_BQKvjU4ldYtFQ8rM0keZvsUaxaQfCi55CXndTIbvKaZLH99sauUKg9DDnMjz8zE0IOgZ6xNYiv_IwpqboPZAVrzttOUfWRrKhSslWSsV2yl_MTpdApCSty_80ntMXHYMYGJ1-KCRab6BrTlOfYDn7CkJd2tqYUTD78aCYc_Dw1z748NlcJc8Cx2cQ5DCZ5zAdkx5kx46e3d588XF3eX3xvb--uby7Ob1tTRywtgt30TPacCctACOCSQT8IIbvegpOWOec2a2UlgOp76xAo1KKMbToYkO-ToyU35uJ1tr6gfbQxhLqRliCoYKKiLwvapvhzxlz05LPFcTQB45x1PZqCdf8Kj_-BT3FOdfFqODAKjPGuqpNF2RRzTuj0NvnJpN8a6GuW0Fz_-YAqPy_SeGP-Zr1np_9jb229HZx28zgW_FX4C3B5kCs</recordid><startdate>19890701</startdate><enddate>19890701</enddate><creator>Wu, C. Y</creator><creator>Sutton, W. H</creator><creator>Love, T. J</creator><general>American Institute of Aeronautics and Astronautics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>19890701</creationdate><title>Directional emittance of a two-dimensional scattering medium with Fresnel boundaries</title><author>Wu, C. Y ; Sutton, W. H ; Love, T. J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a287t-e1cb9279324c2144137219d44769c1f7c2fffb58c711899cfe101e10022b61de3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1989</creationdate><topic>420400 - Engineering- Heat Transfer & Fluid Flow</topic><topic>ALBEDO</topic><topic>COHERENT SCATTERING</topic><topic>DIFFRACTION</topic><topic>ELECTROMAGNETIC RADIATION</topic><topic>Emittance</topic><topic>ENGINEERING</topic><topic>EQUATIONS</topic><topic>INTEGRAL EQUATIONS</topic><topic>ITERATIVE METHODS</topic><topic>MONTE CARLO METHOD</topic><topic>OPTICAL PROPERTIES</topic><topic>PHYSICAL PROPERTIES</topic><topic>RADIATION TRANSPORT</topic><topic>RADIATIONS</topic><topic>REFRACTIVITY</topic><topic>SCATTERING</topic><topic>THERMAL RADIATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, C. Y</creatorcontrib><creatorcontrib>Sutton, W. 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J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Directional emittance of a two-dimensional scattering medium with Fresnel boundaries</atitle><jtitle>Journal of thermophysics and heat transfer</jtitle><date>1989-07-01</date><risdate>1989</risdate><volume>3</volume><issue>3</issue><spage>274</spage><epage>282</epage><pages>274-282</pages><issn>0887-8722</issn><eissn>1533-6808</eissn><abstract>The influences of the refractive index, scattering albedo, and optical sizes on the thermal radiation in a two-dimensional rectangular, isotropically scattering medium bounded by opically smooth boundaries having Fresnel reflection are considered. The complexity of formulation resulting from this specular resulting from this specular reflection is reduced by treating the images as effective media and by neglecting the radiation from faraway images. The problem can then be described by an integral equation (the source function) that is solved iteratively here; the method is then applied to study the directional emittance of a two- dimensional semi-infinite slab. Results show that the directional emittance is aximuthally dependent for the rectangular geometries, that the effects of the relative refractive index on the emittance depend significantly on the albedo, and that Fresnel reflection generally decreases the angular dependence of the emittance compared to free boundaries. (Author)</abstract><cop>Reston</cop><pub>American Institute of Aeronautics and Astronautics</pub><doi>10.2514/3.28786</doi><tpages>9</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0887-8722 |
| ispartof | Journal of thermophysics and heat transfer, 1989-07, Vol.3 (3), p.274-282 |
| issn | 0887-8722 1533-6808 |
| language | eng |
| recordid | cdi_aiaa_journals_10_2514_3_28786 |
| source | Alma/SFX Local Collection |
| subjects | 420400 - Engineering- Heat Transfer & Fluid Flow ALBEDO COHERENT SCATTERING DIFFRACTION ELECTROMAGNETIC RADIATION Emittance ENGINEERING EQUATIONS INTEGRAL EQUATIONS ITERATIVE METHODS MONTE CARLO METHOD OPTICAL PROPERTIES PHYSICAL PROPERTIES RADIATION TRANSPORT RADIATIONS REFRACTIVITY SCATTERING THERMAL RADIATION |
| title | Directional emittance of a two-dimensional scattering medium with Fresnel boundaries |
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