{"id":304024,"date":"2023-08-30T06:20:04","date_gmt":"2023-08-30T06:20:04","guid":{"rendered":"\/forum\/forums\/reply\/304024\/"},"modified":"2023-08-30T06:20:04","modified_gmt":"2023-08-30T06:20:04","slug":"304024","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/304024\/","title":{"rendered":"Reply To: Semi-Transparent Walls Boundary Condition"},"content":{"rendered":"<p>&lt;p&gt;Given that the temperature in the room is 298 K and the temperature in the surroundings is 278 K. In Ansys, I&#8217;m trying to move heat from the bottom room surface to the roof top using thermal radiation heat transfer and the Discrete ordinates approach. Furthermore, CO2 gas is present between the glass windows.&nbsp;&lt;br&gt;Bottom glass is made of two materials: simple window glass (opaque) and ZnS glass (semi-transparent).&nbsp;&lt;br&gt;The top glass is made of the same material as the bottom glass, but the Zns glass is positioned asymmetrically in relation to the bottom glass.&nbsp;&lt;\/p&gt;&lt;p&gt;I&#8217;m trying to enter the following boundary conditions: My issue is as follows:&nbsp;&lt;\/p&gt;&lt;p&gt;I can provide the internal emissivity at different wavelengths (which I have in my model) for the Opaque type.&lt;\/p&gt;&lt;p&gt;However, I am unable to provide internal emissivity for semi-transparent materials.&lt;\/p&gt;&lt;p&gt;However, I am unable to provide internal emissivity for semi-transparent types; instead, I must provide internal emissivity for ZnS glass, which has a transparency of 75%, emissivity of 25%, and reflection of zero.&nbsp;&lt;\/p&gt;&lt;p&gt;Could someone please assist me with this? Where should I enter the ZnS glass properties?&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-304024","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Given that the temperature in the room is 298 K and the temperature in the surroundings is 278 K. In Ansys, I&#039;m trying to move heat from the bottom room surface to the roof top using thermal radiation heat transfer and the Discrete ordinates approach. Furthermore, CO2 gas is present between the glass windows. 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