{"id":403812,"date":"2025-01-06T23:50:40","date_gmt":"2025-01-06T23:50:40","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/"},"modified":"2025-01-06T23:50:40","modified_gmt":"2025-01-06T23:50:40","slug":"species-gradient-calculation-udf-error-cant-find-the-function","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/","title":{"rendered":"species gradient calculation UDF error &#8212; can&#8217;t find the function"},"content":{"rendered":"<p>&lt;p&gt;case: 2D, kw-sst, coal-combustion, species transport, DPM.&lt;\/p&gt;&lt;p&gt;to get gradient of species mass fraction.&lt;\/p&gt;&lt;p&gt;I use UDF code 3.2.12.6 in UDF manual.&lt;\/p&gt;&lt;p&gt;changes: C_VOF(c, t)&nbsp; &gt;&gt;&gt; C_YI(c, t, 0) &nbsp;F_VOF(c, t)&nbsp; &gt;&gt;&gt; F_YI(c, t, 0) ).&nbsp; 0: volatile&nbsp;&lt;\/p&gt;&lt;p&gt;however, it didnot produce any result of species gradient.&nbsp;&lt;\/p&gt;&lt;p&gt;I have hooked it up. I still got the error.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/06-01-2025-1736206992-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/06-01-2025-1736207068-mceclip2.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403812","topic","type-topic","status-publish","hentry","topic-tag-2d_dpm-1","topic-tag-cfd-udf-fleunt","topic-tag-species-gradient-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) &gt;&gt;&gt; C_YI(c, t, 0) F_VOF(c, t) &gt;&gt;&gt; F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/\" \/>\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=\"species gradient calculation UDF error \u2014 can\u2019t find the function | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) &gt;&gt;&gt; C_YI(c, t, 0) F_VOF(c, t) &gt;&gt;&gt; F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-01-06T23:50:40+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2025-01-06T23:50:40+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"species gradient calculation UDF error \u2014 can\u2019t find the function | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) &gt;&gt;&gt; C_YI(c, t, 0) F_VOF(c, t) &gt;&gt;&gt; F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error.\" \/>\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\\\/species-gradient-calculation-udf-error-cant-find-the-function\\\/#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\\\/species-gradient-1\\\/#listItem\",\"name\":\"species-gradient\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/species-gradient-1\\\/#listItem\",\"position\":3,\"name\":\"species-gradient\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/species-gradient-1\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/species-gradient-calculation-udf-error-cant-find-the-function\\\/#listItem\",\"name\":\"species gradient calculation UDF error &#8212; can&#8217;t find the function\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/species-gradient-calculation-udf-error-cant-find-the-function\\\/#listItem\",\"position\":4,\"name\":\"species gradient calculation UDF error &#8212; can&#8217;t find the function\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/species-gradient-1\\\/#listItem\",\"name\":\"species-gradient\"}}]},{\"@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\\\/species-gradient-calculation-udf-error-cant-find-the-function\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/species-gradient-calculation-udf-error-cant-find-the-function\\\/\",\"name\":\"species gradient calculation UDF error \\u2014 can\\u2019t find the function | Ansys Learning Forum\",\"description\":\"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) >>> C_YI(c, t, 0) F_VOF(c, t) >>> F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error.\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/species-gradient-calculation-udf-error-cant-find-the-function\\\/#breadcrumblist\"},\"datePublished\":\"2025-01-06T23:50:40+00:00\",\"dateModified\":\"2025-01-06T23:50:40+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\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"species gradient calculation UDF error \u2014 can\u2019t find the function | Ansys Learning Forum","description":"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) >>> C_YI(c, t, 0) F_VOF(c, t) >>> F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error.","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/#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\/species-gradient-1\/#listItem","name":"species-gradient"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/species-gradient-1\/#listItem","position":3,"name":"species-gradient","item":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/species-gradient-1\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/#listItem","name":"species gradient calculation UDF error &#8212; can&#8217;t find the function"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/#listItem","position":4,"name":"species gradient calculation UDF error &#8212; can&#8217;t find the function","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/species-gradient-1\/#listItem","name":"species-gradient"}}]},{"@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\/species-gradient-calculation-udf-error-cant-find-the-function\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/","name":"species gradient calculation UDF error \u2014 can\u2019t find the function | Ansys Learning Forum","description":"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) >>> C_YI(c, t, 0) F_VOF(c, t) >>> F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error.","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/#breadcrumblist"},"datePublished":"2025-01-06T23:50:40+00:00","dateModified":"2025-01-06T23:50:40+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":"species gradient calculation UDF error \u2014 can\u2019t find the function | Ansys Learning Forum","og:description":"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) &gt;&gt;&gt; C_YI(c, t, 0) F_VOF(c, t) &gt;&gt;&gt; F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error.","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/","article:published_time":"2025-01-06T23:50:40+00:00","article:modified_time":"2025-01-06T23:50:40+00:00","twitter:card":"summary_large_image","twitter:title":"species gradient calculation UDF error \u2014 can\u2019t find the function | Ansys Learning Forum","twitter:description":"case: 2D, kw-sst, coal-combustion, species transport, DPM.to get gradient of species mass fraction.I use UDF code 3.2.12.6 in UDF manual.changes: C_VOF(c, t) &gt;&gt;&gt; C_YI(c, t, 0) F_VOF(c, t) &gt;&gt;&gt; F_YI(c, t, 0) ). 0: volatile however, it didnot produce any result of species gradient. I have hooked it up. I still got the error."},"aioseo_meta_data":{"post_id":"403812","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2025-10-19 11:00:50","updated":"2025-10-19 11:00:50","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"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\/species-gradient-1\/\" title=\"species-gradient\">species-gradient<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tspecies gradient calculation UDF error \u2014 can\u2019t find the function\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":"species-gradient","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/species-gradient-1\/"},{"label":"species gradient calculation UDF error &#8212; can&#8217;t find the function","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-gradient-calculation-udf-error-cant-find-the-function\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["403812"],"_bbp_author_ip":["24.3.104.227"],"_bbp_last_reply_id":["404107"],"_bbp_last_active_id":["404107"],"_bbp_last_active_time":["2025-01-08 13:46:01"],"_bbp_reply_count":["10"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["27819","199"],"_btv_view_count":["325"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["199","27819"]},"test":"ll00023mix-wvu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403812","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\/403812\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=403812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}