{"id":160237,"date":"2021-07-09T05:47:22","date_gmt":"2021-07-09T05:47:22","guid":{"rendered":"\/forum\/forums\/topic\/setting-the-energy-source-term-for-porous-zones\/"},"modified":"2021-07-12T11:00:18","modified_gmt":"2021-07-12T11:00:18","slug":"setting-the-energy-source-term-for-porous-zones","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/setting-the-energy-source-term-for-porous-zones\/","title":{"rendered":"Setting the energy source term for porous zones"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>I am a university student in Japan who uses ANSYS for research.<\/p>\n<p>I am doing a research on heat transfer when a fluid flows through a packed layer.<\/p>\n<p>In my simulation, the temperature of the solid in the packed layer increases when the fluid flows in the positive direction and decreases when it flows in the negative direction.\u3000This temperature rise and fall is set by the energy of the source term in the porous zone.<\/p>\n<p>However, the simulation does not work well with the following message<\/p>\n<ul>\n<li>Message: Error at Node 0: Invalid expression : energy_profile\/1[s].<\/li>\n<\/ul>\n<p>Please help me with my research, I would appreciate it.<\/p>\n<p><\/p>\n<\/p>\n<p>The expression I set for the energy term is as follows<\/p>\n<ul>\n<li>IF(u_profile\/1[m\/s]&gt;0,energy,-energy)&nbsp;<\/li>\n<\/ul>\n<p>where u_profile is the flow velocity and energy is the temperature rise and fall.<\/p>\n<p>The equations for u_profile and energy are as follows<\/p>\n<ul>\n<li>u_profile = 0.9*sin(omega*Time)<\/li>\n<li>energy = entoropy_change*mass([&#039;porous_zone&#039;])*T([&#039;porous_zone&#039;])\/(3.0[m^3]*10^-6)<\/li>\n<li>entoropy_change = 5.3[J\/(kg*K)]*exp(-(T\/1[K]-110)^2\/5.0^2)<\/li>\n<\/ul>\n<p>A simple model diagram is shown below.<\/p>\n<p>I am looking forward to your advice.<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/469\/UG65I3JP02RK.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/469\/UG65I3JP02RK.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 (57).png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-160237","topic","type-topic","status-closed","hentry","topic-tag-ansys-fluent"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["617"],"_bbp_likes_count":["0"],"_bbp_subscription":["250680"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["160237"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","207980"],"_bbp_voice_count":["3"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["184911"],"_bbp_last_active_id":["184911"],"_bbp_last_active_time":["2021-07-12 11:00:18"]},"test":"ce202047meiji-ac-jp"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/160237","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\/160237\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=160237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}