{"id":388339,"date":"2024-10-07T08:44:58","date_gmt":"2024-10-07T08:44:58","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/"},"modified":"2024-10-07T08:44:58","modified_gmt":"2024-10-07T08:44:58","slug":"388339","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/","title":{"rendered":"Reply To: Mass conservation vs inflow and outflow"},"content":{"rendered":"<p>&lt;p&gt;Hi,&lt;\/p&gt;&lt;p&gt;When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m&sup3;\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m&sup3;\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation of mass, so it would show an inflow of 3m&sup3;\/s if no other inflow or outflow boundaries are defined. This is because the simulation assumes that the mass entering a system equals the mass leaving the system. In the case where there is no natural opening and the extract fan is removing 3m&sup3;\/s, the conservation of mass would still apply. In reality, the room would develop a negative pressure.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-388339","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,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\u00b3\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\u00b3\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/\" \/>\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: Mass conservation vs inflow and outflow | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\u00b3\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\u00b3\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-10-07T08:44:58+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-10-07T08:44:58+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Mass conservation vs inflow and outflow | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\u00b3\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\u00b3\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation\" \/>\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\\\/388339\\\/#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\\\/388339\\\/#listItem\",\"name\":\"Reply To: Mass conservation vs inflow and outflow\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/388339\\\/#listItem\",\"position\":2,\"name\":\"Reply To: Mass conservation vs inflow and outflow\",\"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\\\/388339\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/388339\\\/\",\"name\":\"Reply To: Mass conservation vs inflow and outflow | Ansys Learning Forum\",\"description\":\"Hi,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\\u00b3\\\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\\u00b3\\\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/388339\\\/#breadcrumblist\"},\"datePublished\":\"2024-10-07T08:44:58+00:00\",\"dateModified\":\"2024-10-07T08:44:58+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\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Reply To: Mass conservation vs inflow and outflow | Ansys Learning Forum","description":"Hi,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\u00b3\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\u00b3\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/#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\/388339\/#listItem","name":"Reply To: Mass conservation vs inflow and outflow"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/#listItem","position":2,"name":"Reply To: Mass conservation vs inflow and outflow","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\/388339\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/","name":"Reply To: Mass conservation vs inflow and outflow | Ansys Learning Forum","description":"Hi,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\u00b3\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\u00b3\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/#breadcrumblist"},"datePublished":"2024-10-07T08:44:58+00:00","dateModified":"2024-10-07T08:44:58+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: Mass conservation vs inflow and outflow | Ansys Learning Forum","og:description":"Hi,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\u00b3\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\u00b3\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/","article:published_time":"2024-10-07T08:44:58+00:00","article:modified_time":"2024-10-07T08:44:58+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: Mass conservation vs inflow and outflow | Ansys Learning Forum","twitter:description":"Hi,When modeling an extract fan in a room with a very small natural opening, if the fan is set to remove air at a rate of 3m\u00b3\/s, in a real-world scenario, the small opening would not realistically accommodate a 3m\u00b3\/s inflow due to physical limitations. In CFD, however, the simulation must adhere to the conservation"},"aioseo_meta_data":{"post_id":"388339","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:24:41","updated":"2026-08-15 07:46:06","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tReply To: Mass conservation vs inflow and outflow\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Reply To: Mass conservation vs inflow and outflow","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/388339\/"}],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/388339","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/388339\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=388339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}