{"id":292934,"date":"2023-07-13T13:19:55","date_gmt":"2023-07-13T13:19:55","guid":{"rendered":"\/forum\/forums\/reply\/292934\/"},"modified":"2023-07-13T13:21:11","modified_gmt":"2023-07-13T13:21:11","slug":"292934","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/292934\/","title":{"rendered":"Reply To: Translucent internal surfaces+Radiation model"},"content":{"rendered":"<p>&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;From the imgae you shared, I am assuming you are already defining these internal surfaces as interface surfaces. To learn more about interface surfaces, please refer to the user manual page.&lt;\/p&gt;&lt;p&gt;May I know the fluent version you are using. If you are using older version, you will find option to input internal emissivty under thermal boundary condition. I assume you are using DO radiation model. Correct me if I am wrong.&lt;\/p&gt;&lt;p&gt;Please refer to the user manual guide <a href=\"https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v222\/en\/flu_th\/flu_th_sec_mod_disco.html\">5.3.6. Discrete Ordinates (DO) Radiation Model Theory (ansys.com)<\/a>&lt;\/p&gt;&lt;p&gt;section :&nbsp;&lt;\/p&gt;&lt;p class=&#8221;&rdquo;&rdquo;MsoNormal&rdquo;&rdquo;&#8221;&gt;5.3.6.6. Boundary and Cell Zone Condition Treatment at Opaque Walls and&nbsp;&lt;\/p&gt;&lt;p class=&#8221;&rdquo;&rdquo;MsoNormal&rdquo;&rdquo;&#8221;&gt;5.3.6.7.1. Semi-Transparent Interior Walls&nbsp;&lt;\/p&gt;&lt;p class=&#8221;&rdquo;&rdquo;MsoNormal&rdquo;&rdquo;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p class=&#8221;&rdquo;&rdquo;MsoNormal&rdquo;&rdquo;&#8221;&gt;To learn how absorption, transmission and refelction is acconted in DO raditaion model. You will have to input emissivity, absorption coefficient, refractive index and diffuse fraction etc for the same.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-292934","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/292934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/292934\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=292934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}