{"id":161783,"date":"2023-01-25T07:16:57","date_gmt":"2023-01-25T07:16:57","guid":{"rendered":"\/knowledge\/forums\/topic\/i-am-running-a-cht-case-and-getting-some-strange-temperature-trends-for-an-interface-that-connects-solid-object-with-sharp-edges-to-the-surrounding-gas-what-settings-can-i-use-in-fluent-and-cfx-to-ad\/"},"modified":"2023-07-31T12:35:53","modified_gmt":"2023-07-31T12:35:53","slug":"i-am-running-a-cht-case-and-getting-some-strange-temperature-trends-for-an-interface-that-connects-solid-object-with-sharp-edges-to-the-surrounding-gas-what-settings-can-i-use-in-fluent-and-cfx-to-ad","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/i-am-running-a-cht-case-and-getting-some-strange-temperature-trends-for-an-interface-that-connects-solid-object-with-sharp-edges-to-the-surrounding-gas-what-settings-can-i-use-in-fluent-and-cfx-to-ad\/","title":{"rendered":"I am running a CHT case and getting some strange temperature trends for an interface that connects solid object with sharp edges to the surrounding gas. What settings can I use in Fluent and CFX to address this?"},"content":{"rendered":"<p>In CFX you can set the expert parameter &#8216;skew diffusion scheme=3&#8217;    In Fluent, the equivalent to the CFX parameter is to type (rpvar &#8216;temperature\/secondary-gradient? #f) in the Fluent TUI. This setting drops all nonorthogonal diffusion contributions, which is less accurate (zero-order) for skewed cells, but more robust\/bounded.  An alternative workaround, which does something like this at just the boundaries\/interface, is to type &#8220;solve set expert&#8221; in the TUI and to answer &#8216;yes&#8217; to the first question (&#8216;use alternate formulation for wall temperatures?&#8217;.) This second option might be better, as it affects only the interface connection.<\/p>\n","protected":false},"template":"","class_list":["post-161783","topic","type-topic","status-publish","hentry","topic-tag-18-2","topic-tag-cht","topic-tag-conjugate-heat-transfer","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-heat-transfer-and-radiation","topic-tag-heat-transfer","topic-tag-radiation"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_forum_id":["27791"],"_bbp_author_ip":["23.56.168.180"],"_bbp_last_active_time":["1-24-2023  20:20:19"],"_btv_view_count":["521"],"siebel_km_number":["2051282"],"product_version":["18.2"],"km_published_date":["2017-09-13T14:53:11.000Z"],"family":["Fluid Dynamics"],"application_name":["FLUENT"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161783","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\/161783\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=161783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}