{"id":315121,"date":"2023-11-06T19:37:47","date_gmt":"2023-11-06T19:37:47","guid":{"rendered":"\/forum\/forums\/topic\/deleting-boundary-conditions-with-element-birth-death-technique-on-apdl\/"},"modified":"2024-08-14T20:32:12","modified_gmt":"2024-08-14T20:32:12","slug":"deleting-boundary-conditions-with-element-birth-death-technique-on-apdl","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/deleting-boundary-conditions-with-element-birth-death-technique-on-apdl\/","title":{"rendered":"Deleting boundary conditions with element birth\/death technique on APDL"},"content":{"rendered":"

Hello,<\/p>\n

I’m working on modelling gradually the deposition of powder by using the element birth\/death technique through a transient thermal simulation. However, I’m not able to delete the boundary conditions applied to nodes (SF, for top convection) of a layer once it is below another layer of elements (dead or alive):<\/p>\n

 \"\"<\/p>\n

The problem is that the top convection in red on the figure in the second step cannot be deleted with SFDELE. I know that by selecting a surface (SFA\/SFADELE) the boundary conditions can be apply, but it does create a selection issue for the incremental activation (require more complexe meshing to selecte correctly the desire area). <\/p>\n

So I was wondering if there is something I am missing or if there is any way to bypass this issue and still be able to deactive the top convection of elements below incrementally.<\/p>\n

Thank you,<\/p>\n

Leon<\/p>\n","protected":false},"template":"","class_list":["post-315121","topic","type-topic","status-answered","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["67238","20905","58821"],"_bbp_author_ip":["104.102.248.196"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1046"],"_bbp_status":["publish"],"_bbp_topic_status":["answered"],"_bbp_notification_enabled":["67238","67238","67238"],"_bbp_topic_id":["315121"],"_bbp_forum_id":["27791"],"_bbp_engagement":["20905","58821","67238"],"_bbp_voice_count":["3"],"_bbp_last_reply_id":["317933"],"_bbp_last_active_id":["317933"],"_bbp_last_active_time":["2023-11-16 08:49:57"]},"test":"b4e0cd226ec32b19e968e443a48982cfe183dcb9"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/315121","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/315121\/revisions"}],"predecessor-version":[{"id":378950,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/315121\/revisions\/378950"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=315121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}