{"id":457369,"date":"2026-04-29T11:54:10","date_gmt":"2026-04-29T11:54:10","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-parameterize-mass-flow-in-periodic-conditions\/"},"modified":"2026-04-29T11:54:10","modified_gmt":"2026-04-29T11:54:10","slug":"how-to-parameterize-mass-flow-in-periodic-conditions","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-parameterize-mass-flow-in-periodic-conditions\/","title":{"rendered":"How to parameterize Mass Flow in Periodic Conditions?"},"content":{"rendered":"<p>&lt;p data-path-to-node=&#8221;5&#8243;&gt;Hello,&lt;\/p&gt;&lt;p data-path-to-node=&#8221;6&#8243;&gt;I am trying to automate a series of simulations using the &lt;strong data-path-to-node=&#8221;6&#8243; data-index-in-node=&#8221;58&#8243;&gt;Workbench Parameter Set<\/strong>. My goal is to vary the &lt;strong data-path-to-node=&#8221;6&#8243; data-index-in-node=&#8221;106&#8243;&gt;Mass Flow Rate<\/strong> in a &lt;strong data-path-to-node=&#8221;6&#8243; data-index-in-node=&#8221;126&#8243;&gt;Periodic Boundary Condition<\/strong>.&lt;\/p&gt;&lt;p data-path-to-node=&#8221;7&#8243;&gt;To achieve this, I created a&nbsp;&lt;strong data-path-to-node=&#8221;7&#8243; data-index-in-node=&#8221;29&#8243;&gt;&nbsp;<\/strong>named expression in Fluent called mdot and enabled it as an &nbsp;input parameter (so it appears in the Workbench Parameter Set). However, when I open the periodic conditions dialog box, I cannot find a way to assign this mdot expression to the mass flow rate field. The input field for the mass flow rate does not seem to support expressions or parameter selection directly.&lt;\/p&gt;&lt;p data-path-to-node=&#8221;8&#8243;&gt;Could you please guide me on how to correctly link my mdot input parameter to the Periodic Mass Flow Rate so that I can control it from the Workbench level?&lt;\/p&gt;&lt;p data-path-to-node=&#8221;9&#8243;&gt;Best regards.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-457369","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["457369"],"_bbp_subscription":["513264","199"],"_bbp_author_ip":["159.146.121.207"],"_bbp_last_reply_id":["457419"],"_bbp_last_active_id":["457419"],"_bbp_last_active_time":["2026-04-29 19:20:30"],"_bbp_reply_count":["9"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["513264","199"],"_btv_view_count":["19"],"_bbp_topic_status":["unanswered"],"_bbp_likes_count":["1"],"_bbp_notification_enabled":["513264"]},"test":"melihcelilozkaragmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457369","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\/457369\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=457369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}