{"id":37971,"date":"2019-09-27T11:18:07","date_gmt":"2019-09-27T11:18:07","guid":{"rendered":"\/forum\/forums\/topic\/what-are-internal-and-external-emissivity\/"},"modified":"2019-09-27T11:18:07","modified_gmt":"2019-09-27T11:18:07","slug":"what-are-internal-and-external-emissivity","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-are-internal-and-external-emissivity\/","title":{"rendered":"What are Internal and external emissivity?"},"content":{"rendered":"<p>Now I have a geometry&nbsp;made of carbon inside Vaccum&nbsp;chamber&nbsp;. Now emissivity of carbon is around 0.8. Now in fluent there are two options &#8220;internal&#8221; and &#8220;external&#8221; emissivity. Now what will be internal emissivity here? will it be 0.8? or 0.2?&nbsp; Now there is no other source which will cause radiation but one part of my geometry will contribute to increse temperature in other part. In that case what will be my external emissivity?<\/p>\n<p><\/p>\n<p>thanks in advance!<\/p>\n","protected":false},"template":"","class_list":["post-37971","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["10149"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["694"],"_bbp_subscription":["243211"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["37971"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","168781"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["95017"],"_bbp_last_active_id":["95017"],"_bbp_last_active_time":["2019-09-27 14:48:37"]},"test":"tanmoy"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37971","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37971\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=37971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}