{"id":161715,"date":"2023-01-25T07:16:47","date_gmt":"2023-01-25T07:16:47","guid":{"rendered":"\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/"},"modified":"2023-07-31T12:35:46","modified_gmt":"2023-07-31T12:35:46","slug":"what-are-the-steps-in-using-a-udf-in-my-fluent-case-file","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/","title":{"rendered":"What are the steps in using a UDF in my Fluent case file?"},"content":{"rendered":"<p>UDFs can be used in one of two possible ways, compiled or interpreted.  COMPILED UDFs  1. Compile the UDF  a . Define > User-Defined > Functions > Compiled b.  Browse and add the relevant .c and .h files in appropriate columns c.  Build \u2013 this will create the libudf directory  2. Click the Load button to load the UDF  3. Hook the functions in appropriate places 4. Run the simulation  INTERPRETED UDFs  1. Interpret the UDF a. Define > User-Defined > Functions > Interpreted b. Browse and add the relevant files c. Interpret  2. Hook functions in appropriate places  3. Run simulation<\/p>\n","protected":false},"template":"","class_list":["post-161715","topic","type-topic","status-publish","hentry","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-general-fluent","topic-tag-other","topic-tag-udf","topic-tag-user-defined-functions"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define &gt; User-Defined &gt; Functions &gt; Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \u2013 this will create the libudf directory 2. Click the Load button\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/\" \/>\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 Knowledge | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"What are the steps in using a UDF in my Fluent case file? | Ansys Knowledge\" \/>\n\t\t<meta property=\"og:description\" content=\"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define &gt; User-Defined &gt; Functions &gt; Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \u2013 this will create the libudf directory 2. Click the Load button\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-01-25T07:16:47+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-07-31T12:35:46+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"What are the steps in using a UDF in my Fluent case file? | Ansys Knowledge\" \/>\n\t\t<meta name=\"twitter:description\" content=\"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define &gt; User-Defined &gt; Functions &gt; Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \u2013 this will create the libudf directory 2. Click the Load button\" \/>\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\\\/knowledge\\\/forums\\\/topic\\\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/fluent\\\/#listItem\",\"name\":\"fluent\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/fluent\\\/#listItem\",\"position\":3,\"name\":\"fluent\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/fluent\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\\\/#listItem\",\"name\":\"What are the steps in using a UDF in my Fluent case file?\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\\\/#listItem\",\"position\":4,\"name\":\"What are the steps in using a UDF in my Fluent case file?\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/fluent\\\/#listItem\",\"name\":\"fluent\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#organization\",\"name\":\"Ansys Knowledge\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\\\/\",\"name\":\"What are the steps in using a UDF in my Fluent case file? | Ansys Knowledge\",\"description\":\"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define > User-Defined > Functions > Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \\u2013 this will create the libudf directory 2. Click the Load button\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\\\/#breadcrumblist\"},\"datePublished\":\"2023-01-25T07:16:47+00:00\",\"dateModified\":\"2023-07-31T12:35:46+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/\",\"name\":\"Ansys Knowledge\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"What are the steps in using a UDF in my Fluent case file? | Ansys Knowledge","description":"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define > User-Defined > Functions > Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \u2013 this will create the libudf directory 2. Click the Load button","canonical_url":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/knowledge","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/fluent\/#listItem","name":"fluent"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/fluent\/#listItem","position":3,"name":"fluent","item":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/fluent\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/#listItem","name":"What are the steps in using a UDF in my Fluent case file?"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/#listItem","position":4,"name":"What are the steps in using a UDF in my Fluent case file?","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/fluent\/#listItem","name":"fluent"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#organization","name":"Ansys Knowledge","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/knowledge\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/#webpage","url":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/","name":"What are the steps in using a UDF in my Fluent case file? | Ansys Knowledge","description":"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define > User-Defined > Functions > Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \u2013 this will create the libudf directory 2. Click the Load button","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/#breadcrumblist"},"datePublished":"2023-01-25T07:16:47+00:00","dateModified":"2023-07-31T12:35:46+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#website","url":"https:\/\/innovationspace.ansys.com\/knowledge\/","name":"Ansys Knowledge","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Knowledge | Ansys Innovation Space","og:type":"article","og:title":"What are the steps in using a UDF in my Fluent case file? | Ansys Knowledge","og:description":"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define &gt; User-Defined &gt; Functions &gt; Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \u2013 this will create the libudf directory 2. Click the Load button","og:url":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/","article:published_time":"2023-01-25T07:16:47+00:00","article:modified_time":"2023-07-31T12:35:46+00:00","twitter:card":"summary_large_image","twitter:title":"What are the steps in using a UDF in my Fluent case file? | Ansys Knowledge","twitter:description":"UDFs can be used in one of two possible ways, compiled or interpreted. COMPILED UDFs 1. Compile the UDF a . Define &gt; User-Defined &gt; Functions &gt; Compiled b. Browse and add the relevant .c and .h files in appropriate columns c. Build \u2013 this will create the libudf directory 2. Click the Load button"},"aioseo_meta_data":{"post_id":"161715","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":"2025-10-17 19:20:22","updated":"2026-07-29 06:03:12","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\/knowledge\" 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\/knowledge\/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\/knowledge\/forums\/topic-tag\/fluent\/\" title=\"fluent\">fluent<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tWhat are the steps in using a UDF in my Fluent case file?\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/knowledge"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/"},{"label":"fluent","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/fluent\/"},{"label":"What are the steps in using a UDF in my Fluent case file?","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-are-the-steps-in-using-a-udf-in-my-fluent-case-file\/"}],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_forum_id":["27796"],"_bbp_author_ip":["23.56.168.180"],"_bbp_last_active_time":["1-24-2023  20:20:00"],"_btv_view_count":["6697"],"siebel_km_number":["1000462"],"product_version":["Other"],"km_published_date":["2009-09-02T20:55:15.000Z"],"family":["Fluid Dynamics"],"application_name":["FLUENT"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/161715","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\/161715\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=161715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}