{"id":436095,"date":"2025-07-04T12:58:20","date_gmt":"2025-07-04T12:58:20","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/meaning-of-pressure-work-and-viscous-work\/"},"modified":"2025-07-15T08:47:38","modified_gmt":"2025-07-15T08:47:38","slug":"meaning-of-pressure-work-and-viscous-work","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/meaning-of-pressure-work-and-viscous-work\/","title":{"rendered":"Meaning of Pressure Work and Viscous Work"},"content":{"rendered":"<p>&lt;p&gt;I have a simulation of an open volume of air with a fan inside. I want to examine (among other things) how much heat the fan would introduce to my system if it were closed (the real system I simulate is a closed volume of air).&lt;br&gt;&lt;br&gt;I have read the documentation and understood that there is pressure and viscous work and to my understanding both would dissipate to heat in a closed system? Now If I evaluate pressure and viscous work at the wall of my fan, it returns a combined power of 6 W. Is this the total dissipated power? Or do I have to take other factors into account such as the kinetic energy of the fluid exiting my system? I understand this is less a question regarding fluent but somewhat a question regarding fluiddynamics in general.&lt;br&gt;&lt;br&gt;Help is much appreciated! &lt;br&gt;Kind regards&lt;br&gt;Vincent&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-436095","topic","type-topic","status-answered","hentry","topic-tag-energy-dissipation","topic-tag-fan","topic-tag-pressure","topic-tag-viscous-dissipation"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["436095"],"_bbp_subscription":["466482","68667"],"_bbp_author_ip":["213.209.119.105"],"_bbp_last_reply_id":["436770"],"_bbp_last_active_id":["436770"],"_bbp_last_active_time":["2025-07-14 17:35:17"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["466482","68667"],"_btv_view_count":["191"],"_bbp_topic_status":["answered"]},"test":"rademacherdacostacabral-veppendorf-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/436095","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/436095\/revisions"}],"predecessor-version":[{"id":436837,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/436095\/revisions\/436837"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=436095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}