{"id":157153,"date":"2022-06-06T08:32:55","date_gmt":"2022-06-06T08:32:55","guid":{"rendered":"\/knowledge\/forums\/topic\/how-does-the-setting-invariant-in-x-etc-work-for-the-design-tool-vertex-motion-defined-in-region-conditions-2\/"},"modified":"2022-06-06T08:32:55","modified_gmt":"2022-06-06T08:32:55","slug":"how-does-the-setting-invariant-in-x-etc-work-for-the-design-tool-vertex-motion-defined-in-region-conditions-2","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-does-the-setting-invariant-in-x-etc-work-for-the-design-tool-vertex-motion-defined-in-region-conditions-2\/","title":{"rendered":"How does the setting &#8220;Invariant in X&#8221; etc. work for the Design Tool vertex motion defined in Region Conditions?"},"content":{"rendered":"<p>There is one section for each motion direction, i.e. &#8220;X Motion&#8221;, &#8220;Y Motion&#8221; and &#8220;Z Motion&#8221;. For each direction the motion can be enabled (Default), disabled or constrained by the &#8220;Invariant in X\/Y\/Z&#8221; flag.  Some examples: <br \/>1) The default is to have &#8220;Motion Enabled&#8221; for all directions and no invariance constraint. So all nodes can move in all directions, based on the optimal displacement computed by the Design Tool.  <br \/>2) Disabling the flag for &#8220;Motion Enabled&#8221; results in the node not being moved in the disabled direction.  <br \/>2a) So if &#8220;Motion Enabled&#8221; is diabled for the &#8220;Y Motion&#8221;, then the y-coordinates of all nodes in the region will remain unchanged (fixed). In this example the nodes can only move in x- and z-direction.  <br \/>2b) If &#8220;Motion Enabled&#8221; is diabled for the &#8220;X Motion&#8221; and &#8220;Y Motion&#8221;, then the nodes can only move in the z-direction. x- and y-coordinates are fixed.  <br \/>3) The &#8220;Invariant in X\/Y\/Z&#8221; flag indicates that all nodes on the same X\/Y\/Z-location are moved by the same value in the related &#8220;X\/Y\/Z Motion&#8221; direction. <br \/>3a) If &#8220;Invariant in Z&#8221; is set for the &#8220;X Motion&#8221;, then the x deformation (the x component of the displacement) will be invariant in Z coordinate, which means x deformation is constant over different Z coordinates and it can vary over X and Y coordinates. So for example, all nodes on z=0 have the same x-deformation Delta x1 and all nodes on z=1 also have the same x-deformation, but with a different value Delta x2. <br \/>3b) When a constant X Motion for all nodes should be obtained, then all 3 flags &#8220;Invariant in X\/Y\/Z&#8221; for the X Motion have to be selected. <br \/>3c) To move all nodes of the region with the same deformation, i.e. like a rigid body, all 9 &#8220;Invariant in X\/Y\/Z&#8221; flags must be selected.<\/p>\n","protected":false},"template":"","class_list":["post-157153","topic","type-topic","status-publish","hentry","topic-tag-ansys-fluent","topic-tag-fluid-flow-optimization"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["06-06-2022 20:20"],"_bbp_forum_id":["27796"],"_btv_view_count":["396"],"_bbp_likes_count":["0"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/157153","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\/157153\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=157153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}