{"id":459762,"date":"2026-06-15T11:35:42","date_gmt":"2026-06-15T11:35:42","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/clarification-on-coordinate-system-and-azimuthal-direction-in-fluent-2d-axisymme\/"},"modified":"2026-06-15T11:37:23","modified_gmt":"2026-06-15T11:37:23","slug":"clarification-on-coordinate-system-and-azimuthal-direction-in-fluent-2d-axisymme","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/clarification-on-coordinate-system-and-azimuthal-direction-in-fluent-2d-axisymme\/","title":{"rendered":"Clarification on Coordinate System, Azimuthal Direction in Fluent 2D Axisymmetry"},"content":{"rendered":"<p>&lt;p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;Hello,&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;I am working with a 2D axisymmetric model in ANSYS Fluent and would like to clarify the coordinate system conventions used by the solver.&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;My understanding is that:&lt;\/p&gt;&lt;ul data-spread=&#8221;false&#8221;&gt;&lt;\/p&gt;<\/p>\n<ul>\n<li>The (x)-direction represents the axial direction.<\/li>\n<li>The (y)-direction represents the radial direction.<\/li>\n<li>The third direction corresponds to the azimuthal ((\\theta)) direction.<\/li>\n<\/ul>\n<p>&lt;p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;However, I would like to confirm how Fluent defines the positive azimuthal direction and whether the axisymmetric formulation follows the standard right-handed cylindrical coordinate system ((r,\\theta,z)).&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;Specifically, I would appreciate clarification on the following:&lt;\/p&gt;&lt;\/p&gt;<\/p>\n<ol start=\"1\">\n<li>Does Fluent&#8217;s 2D axisymmetric solver follow the standard right-handed cylindrical coordinate convention?<\/li>\n<li>Does Fluent&#8217;s 2D Axisymmetric mapping (&lt;span class=&#8221;math-inline&#8221; data-math=&#8221;x&#8221; data-index-in-node=&#8221;39&#8243;&gt;$x$&lt;\/span&gt;=axial, &lt;span class=&#8221;math-inline&#8221; data-math=&#8221;y&#8221; data-index-in-node=&#8221;48&#8243;&gt;$y$&lt;\/span&gt;=radial) impose a specific parity that requires this coordinate-basis transformation correction?<\/li>\n<li>Is there a simple benchmark or test case that can be used to verify the orientation of the azimuthal direction and related vector quantities?<\/li>\n<li>Are there any Fluent documentation references that describe the coordinate orientation and sign conventions used in axisymmetric calculations?<\/li>\n<\/ol>\n<p>&lt;p&gt;&lt;p&gt;Thank you for your assistance.&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-459762","topic","type-topic","status-publish","hentry","topic-tag-ansys-fluent","topic-tag-axisymmetric","topic-tag-coordinate-systems-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["459762"],"_bbp_subscription":["341207","199"],"_bbp_author_ip":["14.139.186.190"],"_bbp_last_reply_id":["459840"],"_bbp_last_active_id":["459840"],"_bbp_last_active_time":["2026-06-16 08:56:55"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["341207","199"],"_btv_view_count":["67"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["341207"],"_edit_last":["341207"]},"test":"shanmugapriyansvgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/459762","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\/459762\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=459762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}