{"id":440875,"date":"2025-09-05T13:43:32","date_gmt":"2025-09-05T13:43:32","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\/"},"modified":"2025-09-05T13:43:32","modified_gmt":"2025-09-05T13:43:32","slug":"centrifugal-fan-analysis-for-determination-of-characteristic-curve","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\/","title":{"rendered":"Centrifugal Fan Analysis for Determination of Characteristic Curve"},"content":{"rendered":"<p>&lt;p&gt;Hello. I am trying to analyze a backward curved centrifugal fan. The model that I created includes stator,impeller and volute. My aim was determining the characteristic curve which is volume flowrate vs outlet pressure. As boundary condition I tried inlet and outlet as static pressure or openings. At low pressure values it converges however for outlet bc at high pressure values convergence is a bit problematic.It doesn&#8217;t converge. I don&#8217;t think that it is related to mesh as at low pressure values it converges and also y+ value close to the wall of the blades are lower than 30.&nbsp; So what are your suggestions and trying transient solution is the only way to achieve convergence?&lt;\/p&gt;&lt;p&gt;Will be looking forward to your answer,&lt;\/p&gt;&lt;p&gt;Best regards.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-440875","topic","type-topic","status-publish","hentry","topic-tag-ansys-cfx","topic-tag-centrifugal-fan","topic-tag-convergence"],"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 trying to analyze a backward curved centrifugal fan. The model that I created includes stator,impeller and volute. My aim was determining the characteristic curve which is volume flowrate vs outlet pressure. As boundary condition I tried inlet and outlet as static pressure or openings. At low pressure values it converges however for\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\/\" \/>\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=\"Centrifugal Fan Analysis for Determination of Characteristic Curve | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello. I am trying to analyze a backward curved centrifugal fan. The model that I created includes stator,impeller and volute. My aim was determining the characteristic curve which is volume flowrate vs outlet pressure. As boundary condition I tried inlet and outlet as static pressure or openings. At low pressure values it converges however for\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-09-05T13:43:32+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2025-09-05T13:43:32+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Centrifugal Fan Analysis for Determination of Characteristic Curve | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hello. I am trying to analyze a backward curved centrifugal fan. The model that I created includes stator,impeller and volute. My aim was determining the characteristic curve which is volume flowrate vs outlet pressure. As boundary condition I tried inlet and outlet as static pressure or openings. At low pressure values it converges however for\" \/>\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\\\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\\\/#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\\\/convergence\\\/#listItem\",\"name\":\"convergence\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/convergence\\\/#listItem\",\"position\":3,\"name\":\"convergence\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/convergence\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\\\/#listItem\",\"name\":\"Centrifugal Fan Analysis for Determination of Characteristic Curve\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\\\/#listItem\",\"position\":4,\"name\":\"Centrifugal Fan Analysis for Determination of Characteristic Curve\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/convergence\\\/#listItem\",\"name\":\"convergence\"}}]},{\"@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\\\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/centrifugal-fan-analysis-for-determination-of-characteristic-curve\\\/\",\"name\":\"Centrifugal Fan Analysis for Determination of Characteristic Curve | Ansys Learning Forum\",\"description\":\"Hello. I am trying to analyze a backward curved centrifugal fan. The model that I created includes stator,impeller and volute. My aim was determining the characteristic curve which is volume flowrate vs outlet pressure. As boundary condition I tried inlet and outlet as static pressure or openings. 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