{"id":355672,"date":"2024-03-06T15:32:28","date_gmt":"2024-03-06T15:32:28","guid":{"rendered":"\/forum\/forums\/topic\/do-method-for-radiation-heat-transfer\/"},"modified":"2024-03-06T15:32:28","modified_gmt":"2024-03-06T15:32:28","slug":"do-method-for-radiation-heat-transfer","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/do-method-for-radiation-heat-transfer\/","title":{"rendered":"DO method for Radiation Heat Transfer"},"content":{"rendered":"<p>I am modeling the radiation heat transfer by selecting the DO model for PCM filled double glazzing window. Please see the picture below. I am not sure about the values for Free stream temperature and external radiation temperature, as the initial temperature is 288.7K. Do I need a UDF for both? If, yes, please share the UDF if someone has already done this or knows how to write the UDF and import it into FLUENT. Also, do what will be the values for theta and Phi for Beam Width? Angle between window and ground is 90 degree.&nbsp;<\/p>\n<p>Thanks.&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/06-03-2024-1709738814-Fig-5.jpg\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-355672","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am modeling the radiation heat transfer by selecting the DO model for PCM filled double glazzing window. Please see the picture below. I am not sure about the values for Free stream temperature and external radiation temperature, as the initial temperature is 288.7K. Do I need a UDF for both? 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