{"id":183336,"date":"2021-07-01T14:47:05","date_gmt":"2021-07-01T14:47:05","guid":{"rendered":"\/forum\/forums\/reply\/183336\/"},"modified":"2021-07-01T14:48:30","modified_gmt":"2021-07-01T14:48:30","slug":"183336","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/183336\/","title":{"rendered":"Reply To: How to do a UDF to simulate the opening and closing of compressor valves?"},"content":{"rendered":"<p>You will need to change alpha and C2, which are coefficients linked to how permeable the porous media is. In your case they will be found by obtaining the valve pressure loss at different flow rates and open fractions. <br \/>\nNote, this will mimic the valve effect but won&#8217;t provide any useful details on flow in the actual valve. <\/p>\n","protected":false},"template":"","class_list":["post-183336","reply","type-reply","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=\"You will need to change alpha and C2, which are coefficients linked to how permeable the porous media is. In your case they will be found by obtaining the valve pressure loss at different flow rates and open fractions. Note, this will mimic the valve effect but won&#039;t provide any useful details on flow in\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/183336\/\" \/>\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=\"Reply To: How to do a UDF to simulate the opening and closing of compressor valves? | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"You will need to change alpha and C2, which are coefficients linked to how permeable the porous media is. In your case they will be found by obtaining the valve pressure loss at different flow rates and open fractions. Note, this will mimic the valve effect but won&#039;t provide any useful details on flow in\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/183336\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-07-01T14:47:05+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-07-01T14:48:30+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: How to do a UDF to simulate the opening and closing of compressor valves? | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"You will need to change alpha and C2, which are coefficients linked to how permeable the porous media is. In your case they will be found by obtaining the valve pressure loss at different flow rates and open fractions. Note, this will mimic the valve effect but won&#039;t provide any useful details on flow in\" \/>\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\\\/reply\\\/183336\\\/#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\\\/forums\\\/reply\\\/183336\\\/#listItem\",\"name\":\"Reply To: How to do a UDF to simulate the opening and closing of compressor valves?\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/183336\\\/#listItem\",\"position\":2,\"name\":\"Reply To: How to do a UDF to simulate the opening and closing of compressor valves?\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}}]},{\"@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\\\/reply\\\/183336\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/183336\\\/\",\"name\":\"Reply To: How to do a UDF to simulate the opening and closing of compressor valves? | Ansys Learning Forum\",\"description\":\"You will need to change alpha and C2, which are coefficients linked to how permeable the porous media is. 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