{"id":43557,"date":"2020-05-03T17:25:47","date_gmt":"2020-05-03T17:25:47","guid":{"rendered":"\/forum\/forums\/topic\/issue-on-system-coupling-mapping-in-rotating-machinery\/"},"modified":"2020-05-03T17:25:47","modified_gmt":"2020-05-03T17:25:47","slug":"issue-on-system-coupling-mapping-in-rotating-machinery","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/issue-on-system-coupling-mapping-in-rotating-machinery\/","title":{"rendered":"Issue on system coupling mapping in rotating machinery"},"content":{"rendered":"

Good afternoon,<\/p>\n

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I am currently working on a transient one-way FSI (CFX-Mechanical) analysis through System coupling. My object is a centrifugal compressor impeller. I simulate whole 360 degree meshes both in CFX and Mechanical, therefore it’s a case of two usual transient runs (no transient rotor-stator). My goal is to analyse the structural response of impeller to fluid-induced excitations. No need for heat-transfer analysis, I create only Force transfer interfaces. Even though I more or less gathered the basics of data transfer and mapping from the Help, there is still one issue where I experience difficulties.<\/p>\n

<\/p>\n

Since I employ a transient rotor-stator interface in fluid domain, the fluid mesh rotates during the simulation. The structural mesh, though, stays stationary, since the rotation velocity load is only specified to count for centrifugal forces (zero displacement is on shaft-fitting surface, fluid-solid interfaces are specified on 15 blades individually, on impeler hub and shroud). To believe that the solution I recieve is sensible  I need to be sure that the data from rotating (source) mesh’s nodes is always transfered to the same nodes in the stationary (target) mesh (see the Figure below).<\/p>\n

<\/p>\n

\"Desired_mapping_result\"  <\/p>\n

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 <\/p>\n

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I am aware that there is only one mapping step in the entire simulation and this should ensure the requirement I need, but if for some reason the mapping is not strictly “node-to-node” but “node-XYZcoordinate-XYZcoordinate-node” I may obtain the following result, which is then incorrect:<\/p>\n

<\/p>\n

\"Undesired_mapping_result\"<\/p>\n

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 <\/p>\n

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Will be grateful if anyone can commnent on this issue.<\/p>\n

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 <\/p>\n

<\/p>\n

Kirill.<\/p>\n

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 <\/p>\n","protected":false},"template":"","class_list":["post-43557","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["15738"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["508"],"_bbp_subscription":["250848"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["43557"],"_bbp_forum_id":["27818"],"_bbp_engagement":["20093","176686"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["114176"],"_bbp_last_active_id":["114176"],"_bbp_last_active_time":["2020-05-11 20:22:30"]},"test":"kirillkabalyk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/43557","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\/43557\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=43557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}