{"id":373435,"date":"2024-07-24T14:07:48","date_gmt":"2024-07-24T14:07:48","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/373435\/"},"modified":"2024-07-24T14:07:48","modified_gmt":"2024-07-24T14:07:48","slug":"373435","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/373435\/","title":{"rendered":"Reply To: BC: outflow or pressure-outlet?"},"content":{"rendered":"<p>&lt;p&gt;Hi Kim,&lt;\/p&gt;&lt;p&gt;Based on the description, I infer that the current requirement is to setup the case as follow,&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721829340-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;The use of 0 operating density does not directly provide the hydrostatic pressure condition to the solver. It is done so that the correct pressure field could be setup at outlet.&lt;\/p&gt;&lt;p&gt;In your case please use pressure outlet boundary condition. The necessary hydrostatic head at the outlet could be provided through the expression. I have added the snippet below for the same. Please note that the expression would change if the the current mesh position, dimension or the direction of the gravity force is changed. This expression should be hooked at the outlet BC for gauge pressure.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721829322-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-373435","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=\"Hi Kim,Based on the description, I infer that the current requirement is to setup the case as follow,The use of 0 operating density does not directly provide the hydrostatic pressure condition to the solver. It is done so that the correct pressure field could be setup at outlet.In your case please use pressure outlet boundary\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/373435\/\" \/>\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: BC: outflow or pressure-outlet? | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi Kim,Based on the description, I infer that the current requirement is to setup the case as follow,The use of 0 operating density does not directly provide the hydrostatic pressure condition to the solver. It is done so that the correct pressure field could be setup at outlet.In your case please use pressure outlet boundary\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/373435\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721829340-mceclip1.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721829340-mceclip1.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-07-24T14:07:48+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-07-24T14:07:48+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: BC: outflow or pressure-outlet? | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi Kim,Based on the description, I infer that the current requirement is to setup the case as follow,The use of 0 operating density does not directly provide the hydrostatic pressure condition to the solver. 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It is done so that the correct pressure field could be setup at outlet.In your case please use pressure outlet boundary","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/373435\/#breadcrumblist"},"datePublished":"2024-07-24T14:07:48+00:00","dateModified":"2024-07-24T14:07:48+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Reply To: BC: outflow or pressure-outlet? | Ansys Learning Forum","og:description":"Hi Kim,Based on the description, I infer that the current requirement is to setup the case as follow,The use of 0 operating density does not directly provide the hydrostatic pressure condition to the solver. It is done so that the correct pressure field could be setup at outlet.In your case please use pressure outlet boundary","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/373435\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721829340-mceclip1.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721829340-mceclip1.png","article:published_time":"2024-07-24T14:07:48+00:00","article:modified_time":"2024-07-24T14:07:48+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: BC: outflow or pressure-outlet? | Ansys Learning Forum","twitter:description":"Hi Kim,Based on the description, I infer that the current requirement is to setup the case as follow,The use of 0 operating density does not directly provide the hydrostatic pressure condition to the solver. 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