{"id":161521,"date":"2023-01-25T07:16:12","date_gmt":"2023-01-25T07:16:12","guid":{"rendered":"\/knowledge\/forums\/topic\/how-to-define-a-time-dependent-boundary-condition-from-a-1d-profile\/"},"modified":"2023-07-31T12:35:26","modified_gmt":"2023-07-31T12:35:26","slug":"how-to-define-a-time-dependent-boundary-condition-from-a-1d-profile","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-to-define-a-time-dependent-boundary-condition-from-a-1d-profile\/","title":{"rendered":"How to define a time dependent boundary condition from a 1D profile?"},"content":{"rendered":"<p>This can be achieved with a Profile Function. While the documentation only explains the use of spatial profiles, it can also be used for temporal profiles.  This is an example profile file for a time-varying velocity: [Name] My Profile  [Spatial Fields] t  [Data] t [ s ], u [ m \/ s ] 0, 0 1, 0.5 2, 0.8 3, 1.2  This file can be loaded into CFX-Pre with Tools > Initialize Profile Data. In the boundary condition the function can be called to define the inlet velocity as follows: My Boundary.u( t) The specific values for the timesteps are interpolated from this profile.  Keywords: transient, temporal, profile, 1D, boundary condition, interpolation<\/p>\n","protected":false},"template":"","class_list":["post-161521","topic","type-topic","status-publish","hentry","topic-tag-1d","topic-tag-2020-r2","topic-tag-boundary-condition","topic-tag-cel","topic-tag-cfx","topic-tag-fluid-dynamics","topic-tag-general","topic-tag-general-cfx","topic-tag-interpolation","topic-tag-profile","topic-tag-temporal","topic-tag-transient"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_forum_id":["27796"],"_bbp_author_ip":["23.56.168.180"],"_bbp_last_active_time":["1-24-2023  20:20:10"],"_btv_view_count":["2601"],"siebel_km_number":["2063137"],"product_version":["2020 R2"],"km_published_date":["2020-08-13T19:42:51.000Z"],"family":["Fluid Dynamics"],"application_name":["CFX"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161521\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=161521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}