{"id":382273,"date":"2024-09-11T08:39:41","date_gmt":"2024-09-11T08:39:41","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/particle-reaction-rate\/"},"modified":"2024-09-11T08:39:41","modified_gmt":"2024-09-11T08:39:41","slug":"particle-reaction-rate","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/particle-reaction-rate\/","title":{"rendered":"particle reaction rate"},"content":{"rendered":"<p>&lt;p&gt;In transient mode, which parameters do I need to include in my code for the <code>DEFINE_PR_RATE<\/code> macro? How can I ensure that all variables are updated in each interaction and at each time step? The code works fine in steady-state, but when I convert it to transient mode, it gives me a fatal error. Do I need to include time variables in the code? If yes, how should I do that? The UDF manual doesn&#8217;t explain how&nbsp;<code>DEFINE_PR_RATE<\/code> changes for transient cases?&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-382273","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["73128","199"],"_bbp_author_ip":["129.94.96.29"],"_btv_view_count":["118"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1727075123:73128"],"_bbp_topic_id":["382273"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","73128"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["382278"],"_bbp_last_active_id":["382278"],"_bbp_last_active_time":["2024-09-11 09:47:21"]},"test":"z5489721ad-unsw-edu-au"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/382273","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\/382273\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=382273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}