{"id":453470,"date":"2026-02-28T07:16:57","date_gmt":"2026-02-28T07:16:57","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/is-solid-geometry-mandatory-to-define-youngs-modulus-in-fluent\/"},"modified":"2026-02-28T07:16:57","modified_gmt":"2026-02-28T07:16:57","slug":"is-solid-geometry-mandatory-to-define-youngs-modulus-in-fluent","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/is-solid-geometry-mandatory-to-define-youngs-modulus-in-fluent\/","title":{"rendered":"Is Solid Geometry Mandatory to Define Young\u2019s Modulus in Fluent?"},"content":{"rendered":"

<p data-start=”208″ data-end=”350″><span style=”font-size: 12pt;”>Hi,<\/span><\/p><p data-start=”208″ data-end=”350″><span style=”font-size: 12pt;”>I am working in <span class=”whitespace-normal”>ANSYS Fluent<\/span> and exploring options to model compliant wall behavior under fluid pressure loading.<\/span><\/p><p data-start=”352″ data-end=”613″><span style=”font-size: 12pt;”>One possible approach appears to be intrinsic FSI within Fluent. However, my understanding is that intrinsic FSI requires defining a solid domain (i.e., creating an actual solid geometry region) where material properties such as Young’s modulus can be assigned.<\/span><\/p><p data-start=”615″ data-end=”632″><span style=”font-size: 12pt;”>My questions are:<\/span><\/p><\/p>\n

    <li style=”font-size: 12pt;” data-start=”634″ data-end=”716″><p data-start=”637″ data-end=”716″><span style=”font-size: 12pt;”>Is it mandatory to define a solid geometry zone to use intrinsic FSI in Fluent?<\/span><\/p><\/li>\n

    <li style=”font-size: 12pt;” data-start=”717″ data-end=”834″><p data-start=”720″ data-end=”834″><span style=”font-size: 12pt;”>Is there any way to introduce Young’s modulus or elastic wall behavior as wall boundary conditions without explicitly modeling a solid domain?<\/span><\/p><\/li>\n

    <li style=”font-size: 12pt;” data-start=”835″ data-end=”1017″><p data-start=”838″ data-end=”1017″><span style=”font-size: 12pt;”>Can compliant behavior be implemented using dynamic mesh, spring-based boundary conditions, or a UDF without full structural coupling to <span class=”whitespace-normal”>ANSYS Mechanical<\/span>?<\/span><\/p><\/li>\n<\/ol>\n

    <p data-start=”1019″ data-end=”1143″><span style=”font-size: 12pt;”>My goal is to capture pressure-induced wall deformation while avoiding full two-way FSI and structural solution if possible.<\/span><\/p><p data-start=”1145″ data-end=”1218″><span style=”font-size: 12pt;”>I would appreciate clarification on the correct workflow and limitations.<\/span><\/p><p data-start=”1145″ data-end=”1218″><span style=”font-size: 12pt;”>Thanks<\/span><\/p><\/p>\n","protected":false},"template":"","class_list":["post-453470","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["453470"],"_bbp_author_ip":["47.218.206.62"],"_bbp_last_reply_id":["453530"],"_bbp_last_active_id":["453530"],"_bbp_last_active_time":["2026-03-02 09:28:40"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["649866","199"],"_btv_view_count":["51"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["199"]},"test":"trytobeanastamu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/453470","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\/453470\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=453470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}