{"id":403825,"date":"2025-01-07T03:43:41","date_gmt":"2025-01-07T03:43:41","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\/"},"modified":"2025-01-07T03:43:41","modified_gmt":"2025-01-07T03:43:41","slug":"unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\/","title":{"rendered":"Unexpected Periodic Deformation in 2-Way FSI Simulation with Constant Inlet Velo"},"content":{"rendered":"<p>&lt;p&gt;Hi everyone\uff01&lt;\/p&gt;&lt;p&gt;I am conducting a 2-way FSI simulation, where the fluid domain has an inlet velocity of 0.5 m\/s. However, in the structural domain results, six deformation waves appear, which seems unreasonable. Ideally, the deformation should gradually increase over time instead of showing periodic waves.&lt;\/p&gt;&lt;p&gt;Could anyone help identify which settings might be incorrect?&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/07-01-2025-1736221411-3.png\" alt=\"\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403825","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi everyone\uff01I am conducting a 2-way FSI simulation, where the fluid domain has an inlet velocity of 0.5 m\/s. However, in the structural domain results, six deformation waves appear, which seems unreasonable. Ideally, the deformation should gradually increase over time instead of showing periodic waves.Could anyone help identify which settings might be incorrect?\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\/\" \/>\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=\"Unexpected Periodic Deformation in 2-Way FSI Simulation with Constant Inlet Velo | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi everyone\uff01I am conducting a 2-way FSI simulation, where the fluid domain has an inlet velocity of 0.5 m\/s. However, in the structural domain results, six deformation waves appear, which seems unreasonable. Ideally, the deformation should gradually increase over time instead of showing periodic waves.Could anyone help identify which settings might be incorrect?\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-01-07T03:43:41+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2025-01-07T03:43:41+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Unexpected Periodic Deformation in 2-Way FSI Simulation with Constant Inlet Velo | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi everyone\uff01I am conducting a 2-way FSI simulation, where the fluid domain has an inlet velocity of 0.5 m\/s. However, in the structural domain results, six deformation waves appear, which seems unreasonable. Ideally, the deformation should gradually increase over time instead of showing periodic waves.Could anyone help identify which settings might be incorrect?\" \/>\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\\\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\\\/#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\\\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\\\/#listItem\",\"name\":\"Unexpected Periodic Deformation in 2-Way FSI Simulation with Constant Inlet Velo\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\\\/#listItem\",\"position\":3,\"name\":\"Unexpected Periodic Deformation in 2-Way FSI Simulation with Constant Inlet Velo\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}}]},{\"@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\\\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/unexpected-periodic-deformation-in-2-way-fsi-simulation-with-constant-inlet-velo\\\/\",\"name\":\"Unexpected Periodic Deformation in 2-Way FSI Simulation with Constant Inlet Velo | Ansys Learning Forum\",\"description\":\"Hi everyone\\uff01I am conducting a 2-way FSI simulation, where the fluid domain has an inlet velocity of 0.5 m\\\/s. However, in the structural domain results, six deformation waves appear, which seems unreasonable. 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