{"id":343810,"date":"2024-01-09T14:23:59","date_gmt":"2024-01-09T14:23:59","guid":{"rendered":"\/forum\/forums\/topic\/alternative-formulation-of-source-term-in-porous-zone\/"},"modified":"2024-01-12T09:00:29","modified_gmt":"2024-01-12T09:00:29","slug":"alternative-formulation-of-source-term-in-porous-zone","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alternative-formulation-of-source-term-in-porous-zone\/","title":{"rendered":"Fluent: Alternative formulation of source term in porous zone"},"content":{"rendered":"

Hello,<\/p>\n

my questions are dedicated to the definition of a porous zone in ANSYS Fluent (version 2021 R2).
According to the User’s Guide, there are two (not equivalent) implementations of a source term:<\/p>\n

– default formulation (equation 7.1)<\/p>\n

\"\"<\/a>
– alternative formulation (equation 7.24 only for inertial term)<\/p>\n

\"\"<\/a><\/p>\n

Question Q1:
From my understanding, the default formulation is rotationally invariant,
but the alternative formulation is not rotationally invariant due to the specific nonlinearity of the inertial term.
Is that correct?<\/p>\n

Question Q2:
Condider a case where the reference frame of the porous zone (defined by direction vectors in Fluent) is rotated to the global coordinate system.
On which frame are the quantities S_i, C_i and v_i of the alternative formulation based?
From the documentation, I cannot clearly see where a transformation of quantities between reference frames is implemented in Fluent.
However, this becomes important if rotational invariance is not fulfilled.<\/p>\n

Thanks for your help!<\/p>\n","protected":false},"template":"","class_list":["post-343810","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["55869","852"],"_bbp_author_ip":["23.206.193.154"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["962"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1705049966:233758"],"_bbp_topic_id":["343810"],"_bbp_forum_id":["27792"],"_bbp_engagement":["852","55869"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["345111"],"_bbp_last_active_id":["345111"],"_bbp_last_active_time":["2024-01-17 11:55:21"]},"test":"karl-schoppmanntu-dresden-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/343810","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":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/343810\/revisions"}],"predecessor-version":[{"id":344407,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/343810\/revisions\/344407"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=343810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}