{"id":461057,"date":"2026-07-08T14:42:56","date_gmt":"2026-07-08T14:42:56","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/representing-feed-volume-as-patched-inlet-for-semi-batch-reaction-in-str\/"},"modified":"2026-07-08T14:42:56","modified_gmt":"2026-07-08T14:42:56","slug":"representing-feed-volume-as-patched-inlet-for-semi-batch-reaction-in-str","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/representing-feed-volume-as-patched-inlet-for-semi-batch-reaction-in-str\/","title":{"rendered":"Representing Feed Volume As Patched Inlet For Semi-Batch Reaction In STR"},"content":{"rendered":"<p>&lt;p&gt;Hello, I have ran a hydrodynamic simulation within my vessel (agitated tank with vortex) using the VOF solver. I now want to simulate feed addition for semi-batch reaction, without adding a feed pipe. From reading previous stirred tank papers (https:\/\/pubs.acs.org\/doi\/10.1021\/ie001123v), one option is to patch a small volume representing feed zone in the tank and add source term via UDF during feed addition (see diagram below). I wanted to ask whether this is feasible and how to go about doing this?&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/07\/08-07-2026-1783521756-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-461057","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["461057"],"_bbp_author_ip":["194.80.234.171"],"_bbp_last_reply_id":["461149"],"_bbp_last_active_id":["461149"],"_bbp_last_active_time":["2026-07-09 15:47:37"],"_bbp_reply_count":["17"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["282802","199"],"_btv_view_count":["62"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["282802"],"_bbp_subscription":["199","282802"]},"test":"ll17s5rleeds-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/461057","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\/461057\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=461057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}