{"id":51493,"date":"2021-01-21T14:54:56","date_gmt":"2021-01-21T14:54:56","guid":{"rendered":"\/forum\/forums\/topic\/rsm-oil-water-hydrocyclone-separator\/"},"modified":"2021-01-21T14:54:56","modified_gmt":"2021-01-21T14:54:56","slug":"rsm-oil-water-hydrocyclone-separator","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rsm-oil-water-hydrocyclone-separator\/","title":{"rendered":"RSM &#8211; oil water hydrocyclone separator"},"content":{"rendered":"<p>I am modelling an oil-water hydrocyclone using the Eulerian model and RSM turbulence. nI believe my solution is converged without issues, however compared to experimental results the model is considerably underpredicting seperation efficiency. The tangential velocity is also underpredicted (which partially drives the seperation).  nI have checked mesh and timestep and while there are some differences it is less than difference between numerical and experimental result. nI am wondering then if it is an issues with regards to turbulence modelling and perhaps this model is overly diffusive. I&#8217;m already using RSM which is the recommended for stongly swirl flows. Being not totally familiar with the mathematical formulation of this model could it be possible to change the coefficents?nAny advice would be greatly welcomed, thank you. n<\/p>\n","protected":false},"template":"","class_list":["post-51493","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am modelling an oil-water hydrocyclone using the Eulerian model and RSM turbulence. nI believe my solution is converged without issues, however compared to experimental results the model is considerably underpredicting seperation efficiency. The tangential velocity is also underpredicted (which partially drives the seperation). nI have checked mesh and timestep and while there are some\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rsm-oil-water-hydrocyclone-separator\/\" \/>\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=\"RSM \u2013 oil water hydrocyclone separator | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I am modelling an oil-water hydrocyclone using the Eulerian model and RSM turbulence. nI believe my solution is converged without issues, however compared to experimental results the model is considerably underpredicting seperation efficiency. The tangential velocity is also underpredicted (which partially drives the seperation). nI have checked mesh and timestep and while there are some\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rsm-oil-water-hydrocyclone-separator\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-01-21T14:54:56+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-01-21T14:54:56+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"RSM \u2013 oil water hydrocyclone separator | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I am modelling an oil-water hydrocyclone using the Eulerian model and RSM turbulence. nI believe my solution is converged without issues, however compared to experimental results the model is considerably underpredicting seperation efficiency. The tangential velocity is also underpredicted (which partially drives the seperation). nI have checked mesh and timestep and while there are some\" \/>\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\\\/rsm-oil-water-hydrocyclone-separator\\\/#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\\\/rsm-oil-water-hydrocyclone-separator\\\/#listItem\",\"name\":\"RSM &#8211; oil water hydrocyclone separator\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/rsm-oil-water-hydrocyclone-separator\\\/#listItem\",\"position\":3,\"name\":\"RSM &#8211; oil water hydrocyclone separator\",\"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\\\/rsm-oil-water-hydrocyclone-separator\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/rsm-oil-water-hydrocyclone-separator\\\/\",\"name\":\"RSM \\u2013 oil water hydrocyclone separator | Ansys Learning Forum\",\"description\":\"I am modelling an oil-water hydrocyclone using the Eulerian model and RSM turbulence. nI believe my solution is converged without issues, however compared to experimental results the model is considerably underpredicting seperation efficiency. 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