{"id":161864,"date":"2023-01-25T07:17:11","date_gmt":"2023-01-25T07:17:11","guid":{"rendered":"\/knowledge\/forums\/topic\/how-i-can-evaluate-the-heat-release-w-m3-of-the-reactions-if-im-using-the-fgm-model-in-fluent-is-there-a-way-to-access-the-fgm-heat-release-from-udf\/"},"modified":"2023-07-31T12:36:02","modified_gmt":"2023-07-31T12:36:02","slug":"how-i-can-evaluate-the-heat-release-w-m3-of-the-reactions-if-im-using-the-fgm-model-in-fluent-is-there-a-way-to-access-the-fgm-heat-release-from-udf","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-i-can-evaluate-the-heat-release-w-m3-of-the-reactions-if-im-using-the-fgm-model-in-fluent-is-there-a-way-to-access-the-fgm-heat-release-from-udf\/","title":{"rendered":"How I can evaluate the Heat release (W\/m3) of the reactions if I&#8217;m using the FGM model in Fluent?  Is there a way to access the FGM heat release from UDF?"},"content":{"rendered":"<p>In R19.2 and forward the heat release rate is stored directly in the FGM tables for post-processing.  This value (in J\/m3\/s) is the summation over species for (H_f_j\/Mw_j)*(w_dot_j) where j is the species index and w_dot_j is the volumetric rate for species j. (That is similar to the energy equation source term due to reaction).   You can also now access this value for post-processing from a DEFINE_PDF_TABLE UDF.  Do do it, just use this call:  real HRR = Get_Pdf_HeatReleaserate (c, t);<\/p>\n","protected":false},"template":"","class_list":["post-161864","topic","type-topic","status-publish","hentry","topic-tag-2020-r1","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-scripting-journaling-udf","topic-tag-species-reactions","topic-tag-udf"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_forum_id":["27784"],"_bbp_author_ip":["23.56.168.180"],"_bbp_last_active_time":["1-24-2023  20:20:01"],"_btv_view_count":["582"],"siebel_km_number":["2059366"],"product_version":["2020 R1"],"km_published_date":["2019-06-13T00:36:26.000Z"],"family":["Fluid Dynamics"],"application_name":["FLUENT"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161864","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161864\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=161864"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}