{"id":392754,"date":"2024-11-05T10:46:14","date_gmt":"2024-11-05T10:46:14","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-realize-the-motion-that-a-rigid-body-moves-in-an-ellipse-path\/"},"modified":"2024-11-05T10:54:34","modified_gmt":"2024-11-05T10:54:34","slug":"how-to-realize-the-motion-that-a-rigid-body-moves-in-an-ellipse-path","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-realize-the-motion-that-a-rigid-body-moves-in-an-ellipse-path\/","title":{"rendered":"How to realize the motion that a rigid body moves in an elliptical path?"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;Hi everyone,&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;&lt;span style=&#8221;mso-spacerun: yes;&#8221;&gt;&nbsp; &lt;\/span&gt;I want to do a 3D simulation that a rigid body moves in an elliptical path, now I have:&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;1. Center axis of the ellipse(in vector form);&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;2.Length of semi-major axis <strong>a<\/strong> and semi-minor axis <strong>b<\/strong>, as is shown in Figure below;&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;3. Rotation speed of the object (rev\/min)&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;&lt;span style=&#8221;mso-spacerun: yes;&#8221;&gt;&nbsp; &lt;\/span&gt;How can I realize this motion, do I need to use UDF?&lt;\/p&gt;&lt;p&gt;and furthermore, any user-defined path. &lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;Regards&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730803537-mceclip0.jpg\" \/>&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392754","topic","type-topic","status-publish","hentry","topic-tag-fluent","topic-tag-udf"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["184661","199"],"_bbp_author_ip":["98.126.229.50"],"_btv_view_count":["189"],"_bbp_topic_status":["unanswered"],"_edit_last":["184661"],"_bbp_revision_log":["a:2:{i:392755;a:2:{s:6:\"author\";i:184661;s:6:\"reason\";s:0:\"\";}i:392758;a:2:{s:6:\"author\";i:184661;s:6:\"reason\";s:0:\"\";}}"],"_bbp_topic_id":["392754"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","184661"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["392927"],"_bbp_last_active_id":["392927"],"_bbp_last_active_time":["2024-11-06 09:48:28"]},"test":"excited"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392754","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":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392754\/revisions"}],"predecessor-version":[{"id":392758,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392754\/revisions\/392758"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=392754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}