{"id":251322,"date":"2023-02-23T23:00:50","date_gmt":"2023-02-23T23:00:50","guid":{"rendered":"\/forum\/forums\/topic\/negative-cell-volume-detected-3\/"},"modified":"2023-02-23T23:00:50","modified_gmt":"2023-02-23T23:00:50","slug":"negative-cell-volume-detected-3","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/","title":{"rendered":"Negative cell volume detected"},"content":{"rendered":"<p>Hello,<\/p>\n<p>I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.html<\/p>\n<p>I did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error &#8220;Update-Dynamic-Mesh failed. Negative cell volume detected&#8221; My mesh quality seems fine as seen on the left part of the image bellow.<\/p>\n<p>As part of a possible solution I changed the mesh acouple of time and decreased the time step(0.0001) but non of these tricks worked.<\/p>\n<p>I have no idea what is causing this issue, any help on this or advice is much appreciated.<\/p>\n<p>Thank you<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/23-02-2023-1677192852-ex.png\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-251322","topic","type-topic","status-closed","hentry","topic-tag-2-way-fsi","topic-tag-fluent-mesh"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error &quot;Update-Dynamic-Mesh failed. Negative\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/\" \/>\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=\"Negative cell volume detected | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error &quot;Update-Dynamic-Mesh failed. Negative\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/23-02-2023-1677192852-ex.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/23-02-2023-1677192852-ex.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-02-23T23:00:50+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-02-23T23:00:50+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Negative cell volume detected | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error &quot;Update-Dynamic-Mesh failed. Negative\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/23-02-2023-1677192852-ex.png\" \/>\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\\\/negative-cell-volume-detected-3\\\/#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\\\/2-way-fsi\\\/#listItem\",\"name\":\"2-way-fsi\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/2-way-fsi\\\/#listItem\",\"position\":3,\"name\":\"2-way-fsi\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/2-way-fsi\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/negative-cell-volume-detected-3\\\/#listItem\",\"name\":\"Negative cell volume detected\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/negative-cell-volume-detected-3\\\/#listItem\",\"position\":4,\"name\":\"Negative cell volume detected\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/2-way-fsi\\\/#listItem\",\"name\":\"2-way-fsi\"}}]},{\"@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\\\/negative-cell-volume-detected-3\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/negative-cell-volume-detected-3\\\/\",\"name\":\"Negative cell volume detected | Ansys Learning Forum\",\"description\":\"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\\\/\\\/ansyshelp.ansys.com\\\/account\\\/secured?returnurl=\\\/Views\\\/Secured\\\/corp\\\/v231\\\/en\\\/flu_ug\\\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error \\\"Update-Dynamic-Mesh failed. Negative\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/negative-cell-volume-detected-3\\\/#breadcrumblist\"},\"datePublished\":\"2023-02-23T23:00:50+00:00\",\"dateModified\":\"2023-02-23T23:00:50+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":"Negative cell volume detected | Ansys Learning Forum","description":"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error \"Update-Dynamic-Mesh failed. Negative","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/#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\/2-way-fsi\/#listItem","name":"2-way-fsi"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/2-way-fsi\/#listItem","position":3,"name":"2-way-fsi","item":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/2-way-fsi\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/#listItem","name":"Negative cell volume detected"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/#listItem","position":4,"name":"Negative cell volume detected","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/2-way-fsi\/#listItem","name":"2-way-fsi"}}]},{"@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\/negative-cell-volume-detected-3\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/","name":"Negative cell volume detected | Ansys Learning Forum","description":"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error \"Update-Dynamic-Mesh failed. Negative","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/#breadcrumblist"},"datePublished":"2023-02-23T23:00:50+00:00","dateModified":"2023-02-23T23:00:50+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":"Negative cell volume detected | Ansys Learning Forum","og:description":"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error &quot;Update-Dynamic-Mesh failed. Negative","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/23-02-2023-1677192852-ex.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/23-02-2023-1677192852-ex.png","article:published_time":"2023-02-23T23:00:50+00:00","article:modified_time":"2023-02-23T23:00:50+00:00","twitter:card":"summary_large_image","twitter:title":"Negative cell volume detected | Ansys Learning Forum","twitter:description":"Hello,I am running my first FSI case in Ansys with the help of the Ansys docs: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v231\/en\/flu_ug\/flu_ug_fsi_sec_setup.htmlI did everything as said, I run the solution the first time as indicated with no issue but the moment I set the coupling option and try to run the simulation I gt the following error &quot;Update-Dynamic-Mesh failed. Negative","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/23-02-2023-1677192852-ex.png"},"aioseo_meta_data":{"post_id":"251322","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":"content","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":true,"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":"2024-10-28 18:46:23","updated":"2024-10-28 18:46:23","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\/2-way-fsi\/\" title=\"2-way-fsi\">2-way-fsi<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tNegative cell volume detected\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":"2-way-fsi","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/2-way-fsi\/"},{"label":"Negative cell volume detected","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-cell-volume-detected-3\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["235857","8124"],"_bbp_author_ip":["23.220.96.180"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1403"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["251322"],"_bbp_forum_id":["27792"],"_bbp_engagement":["8124","235857"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["251359"],"_bbp_last_active_id":["251359"],"_bbp_last_active_time":["2023-02-24 09:33:30"]},"test":"laritostudent-ubc-ca"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/251322","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\/251322\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=251322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}