{"id":377567,"date":"2024-08-07T14:04:44","date_gmt":"2024-08-07T14:04:44","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mrf-method-differences-between-version-17-and-version-24\/"},"modified":"2024-08-12T08:20:39","modified_gmt":"2024-08-12T08:20:39","slug":"mrf-method-differences-between-version-17-and-version-24","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mrf-method-differences-between-version-17-and-version-24\/","title":{"rendered":"MRF method differences between version 17 and version 24"},"content":{"rendered":"<p>Hello everyone,<\/p>\n<p>I am currently simulating a compressor which includes a rotating rotor using the MRF method. Previously, I used version 17.2 for the simulation and the flow field appeared normal. However, with the same settings, the simulation results in version 24 are very strange. There is a significant high-speed flow on the walls, which I believe is not a normal simulation result. Below are my settings. Are there significant differences between version 17 and version 24 for these settings?<\/p>\n<p><strong>Mesh:<\/strong><\/p>\n<ul class=\"topic-with-bgcolor\">\n<li class=\"hassub\">Meshing Element size: 0.8mm<\/li>\n<li class=\"hassub\">Face sizing to MRF area: 0.6mm<\/li>\n<\/ul>\n<p><strong>Fluent setting:<\/strong><\/p>\n<ul class=\"topic-with-bgcolor\">\n<li class=\"hassub\">Steady<\/li>\n<li class=\"hassub\">Reynolds stress model<\/li>\n<li class=\"hassub\">Frame motion Y = 1, -4850 rev\/min<\/li>\n<\/ul>\n<p><strong>Material:<\/strong><\/p>\n<ul class=\"topic-with-bgcolor\">\n<li class=\"hassub\">R32<\/li>\n<li class=\"hassub\">Density: 61.5295 kg\/m&sup3;<\/li>\n<li class=\"hassub\">Viscosity: 1.5923e-05 kg\/ms<\/li>\n<\/ul>\n<p><strong>Boundary conditions:<\/strong><\/p>\n<ul class=\"topic-with-bgcolor\">\n<li class=\"hassub\">Mass Flow inlet: 0.01353 kg\/s<\/li>\n<li class=\"hassub\">Pressure outlet: 2824315 Pa<\/li>\n<\/ul>\n<p><strong>Method:<\/strong><\/p>\n<ul class=\"topic-with-bgcolor\">\n<li class=\"hassub\">Coupled<\/li>\n<\/ul>\n<p>Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-377567","topic","type-topic","status-answered","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello everyone,I am currently simulating a compressor which includes a rotating rotor using the MRF method. Previously, I used version 17.2 for the simulation and the flow field appeared normal. However, with the same settings, the simulation results in version 24 are very strange. There is a significant high-speed flow on the walls, which I\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mrf-method-differences-between-version-17-and-version-24\/\" \/>\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=\"MRF method differences between version 17 and version 24 | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello everyone,I am currently simulating a compressor which includes a rotating rotor using the MRF method. Previously, I used version 17.2 for the simulation and the flow field appeared normal. However, with the same settings, the simulation results in version 24 are very strange. There is a significant high-speed flow on the walls, which I\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mrf-method-differences-between-version-17-and-version-24\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-08-07T14:04:44+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-08-12T08:20:39+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"MRF method differences between version 17 and version 24 | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hello everyone,I am currently simulating a compressor which includes a rotating rotor using the MRF method. Previously, I used version 17.2 for the simulation and the flow field appeared normal. However, with the same settings, the simulation results in version 24 are very strange. There is a significant high-speed flow on the walls, which I\" \/>\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\\\/mrf-method-differences-between-version-17-and-version-24\\\/#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\\\/mrf-method-differences-between-version-17-and-version-24\\\/#listItem\",\"name\":\"MRF method differences between version 17 and version 24\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/mrf-method-differences-between-version-17-and-version-24\\\/#listItem\",\"position\":3,\"name\":\"MRF method differences between version 17 and version 24\",\"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\\\/mrf-method-differences-between-version-17-and-version-24\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/mrf-method-differences-between-version-17-and-version-24\\\/\",\"name\":\"MRF method differences between version 17 and version 24 | Ansys Learning Forum\",\"description\":\"Hello everyone,I am currently simulating a compressor which includes a rotating rotor using the MRF method. Previously, I used version 17.2 for the simulation and the flow field appeared normal. However, with the same settings, the simulation results in version 24 are very strange. 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