{"id":392859,"date":"2024-11-05T18:54:59","date_gmt":"2024-11-05T18:54:59","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\/"},"modified":"2024-11-05T18:54:59","modified_gmt":"2024-11-05T18:54:59","slug":"cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\/","title":{"rendered":"CFD simulations with moving mesh on cluster (UDF execution and parallelization)"},"content":{"rendered":"<p>&lt;p&gt;I&#8217;m running Fluent CFD simulations with a moving mesh on a cluster. The simulation works perfectly on my PC by executing the UDFs (Function Hood+Execute on demand) and then defining the dynamic mesh. When I try to run the simulation on the cluster, I get a message of negative volume because it just reads the position of the first node of my model and it never really executes the udf to update the position of the nodes, even if I try to use just 1 core to avoid parallelization issues. Do you know if there is maybe a specific command to execute the udf correctly or it could be related to different Fluent version on my PC and on the cluster? It seems it does not really execute the udf.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392859","topic","type-topic","status-publish","hentry","topic-tag-ansys-fluent-on-clusters","topic-tag-cfd","topic-tag-cluster","topic-tag-dynamic-mesh","topic-tag-moving-deforming-mesh-2","topic-tag-negative-cell-volume","topic-tag-udf"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I&#039;m running Fluent CFD simulations with a moving mesh on a cluster. The simulation works perfectly on my PC by executing the UDFs (Function Hood+Execute on demand) and then defining the dynamic mesh. When I try to run the simulation on the cluster, I get a message of negative volume because it just reads the\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\/\" \/>\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=\"CFD simulations with moving mesh on cluster (UDF execution and parallelization) | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I&#039;m running Fluent CFD simulations with a moving mesh on a cluster. The simulation works perfectly on my PC by executing the UDFs (Function Hood+Execute on demand) and then defining the dynamic mesh. When I try to run the simulation on the cluster, I get a message of negative volume because it just reads the\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-11-05T18:54:59+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-11-05T18:54:59+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"CFD simulations with moving mesh on cluster (UDF execution and parallelization) | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I&#039;m running Fluent CFD simulations with a moving mesh on a cluster. The simulation works perfectly on my PC by executing the UDFs (Function Hood+Execute on demand) and then defining the dynamic mesh. When I try to run the simulation on the cluster, I get a message of negative volume because it just reads the\" \/>\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\\\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\\\/#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\\\/udf\\\/#listItem\",\"name\":\"udf\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/udf\\\/#listItem\",\"position\":3,\"name\":\"udf\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/udf\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\\\/#listItem\",\"name\":\"CFD simulations with moving mesh on cluster (UDF execution and parallelization)\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\\\/#listItem\",\"position\":4,\"name\":\"CFD simulations with moving mesh on cluster (UDF execution and parallelization)\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/udf\\\/#listItem\",\"name\":\"udf\"}}]},{\"@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\\\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/cfd-simulations-with-moving-mesh-on-cluster-udf-execution-and-parallelization\\\/\",\"name\":\"CFD simulations with moving mesh on cluster (UDF execution and parallelization) | Ansys Learning Forum\",\"description\":\"I'm running Fluent CFD simulations with a moving mesh on a cluster. 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