{"id":389885,"date":"2024-10-16T02:18:57","date_gmt":"2024-10-16T02:18:57","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/"},"modified":"2024-10-16T02:52:31","modified_gmt":"2024-10-16T02:52:31","slug":"turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/","title":{"rendered":"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells"},"content":{"rendered":"<p>&lt;p&gt;Hi,&lt;\/p&gt;&lt;p&gt;I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message &#8220;turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells&#8221;. Also, the values for cl, cd, cm, etc are unrealistic huge values.&lt;\/p&gt;&lt;p&gt;What could be the reason for this and how can I solve this? The model works under small velocity (v=10m\/s).&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Can anyone please help with this?&lt;\/p&gt;&lt;p&gt;y+ value is below 1 and CFL set to 0.1.&lt;\/p&gt;&lt;p&gt;Regards,&lt;\/p&gt;&lt;p&gt;Muhammed Sadique&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-389885","topic","type-topic","status-publish","hentry","topic-tag-ansysfluent","topic-tag-cfd-fluent"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi,I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message &quot;turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells&quot;. Also, the values for cl, cd, cm,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi,I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message &quot;turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells&quot;. Also, the values for cl, cd, cm,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-10-16T02:18:57+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-10-16T02:52:31+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi,I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message &quot;turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells&quot;. Also, the values for cl, cd, cm,\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/cfd-fluent\\\/#listItem\",\"name\":\"cfd-fluent\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/cfd-fluent\\\/#listItem\",\"position\":3,\"name\":\"cfd-fluent\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/cfd-fluent\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\\\/#listItem\",\"name\":\"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\\\/#listItem\",\"position\":4,\"name\":\"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/cfd-fluent\\\/#listItem\",\"name\":\"cfd-fluent\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\\\/\",\"name\":\"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells | Ansys Learning Forum\",\"description\":\"Hi,I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). 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When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message \"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells\". Also, the values for cl, cd, cm,","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/forum\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/cfd-fluent\/#listItem","name":"cfd-fluent"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/cfd-fluent\/#listItem","position":3,"name":"cfd-fluent","item":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/cfd-fluent\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/#listItem","name":"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/#listItem","position":4,"name":"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/cfd-fluent\/#listItem","name":"cfd-fluent"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/","name":"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells | Ansys Learning Forum","description":"Hi,I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message \"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells\". Also, the values for cl, cd, cm,","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/#breadcrumblist"},"datePublished":"2024-10-16T02:18:57+00:00","dateModified":"2024-10-16T02:52:31+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells | Ansys Learning Forum","og:description":"Hi,I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message &quot;turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells&quot;. Also, the values for cl, cd, cm,","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/","article:published_time":"2024-10-16T02:18:57+00:00","article:modified_time":"2024-10-16T02:52:31+00:00","twitter:card":"summary_large_image","twitter:title":"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells | Ansys Learning Forum","twitter:description":"Hi,I have a pitching airfoil (chord = 0.15m) simulation (pitches after a certain time using UDF). When I the simulation with Re = 2e6 (v = 197 m\/s), at the beginning itself I am getting this message &quot;turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells&quot;. Also, the values for cl, cd, cm,"},"aioseo_meta_data":[],"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/cfd-fluent\/\" title=\"cfd-fluent\">cfd-fluent<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tturbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"cfd-fluent","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/cfd-fluent\/"},{"label":"turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 640565 cells","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/turbulent-viscosity-limited-to-viscosity-ratio-of-1000000e05-in-640565-cells\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["447160","199"],"_bbp_author_ip":["131.236.54.55"],"_btv_view_count":["644"],"_bbp_topic_status":["unanswered"],"_edit_last":["447160"],"_bbp_revision_log":["a:2:{i:389886;a:2:{s:6:\"author\";i:447160;s:6:\"reason\";s:0:\"\";}i:389889;a:2:{s:6:\"author\";i:447160;s:6:\"reason\";s:0:\"\";}}"],"_bbp_topic_id":["389885"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","447160"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["392550"],"_bbp_last_active_id":["392550"],"_bbp_last_active_time":["2024-11-04 09:39:55"]},"test":"z5456415ad-unsw-edu-au"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/389885","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\/389885\/revisions"}],"predecessor-version":[{"id":389889,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/389885\/revisions\/389889"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=389885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}