{"id":168695,"date":"2022-04-20T15:59:39","date_gmt":"2022-04-20T15:59:39","guid":{"rendered":"\/forum\/forums\/topic\/how-to-define-boundaries-when-simulating-relative-humidity\/"},"modified":"2022-04-21T10:47:26","modified_gmt":"2022-04-21T10:47:26","slug":"how-to-define-boundaries-when-simulating-relative-humidity","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-define-boundaries-when-simulating-relative-humidity\/","title":{"rendered":"How to define boundaries when simulating relative humidity?"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello, <\/p>\n<p>I am using the species model and defined 50% relative humidity (Mass fraction of h2o is 0.00879) in my model. Temperature is constant at the inlet, outlet, and walls. I defined the inlet as a pressure outlet and also defined the outlet as a velocity inlet. The result that I am getting shows relative humidity of 1200% and even more in finer meshes. <\/p>\n<p>Now my questions are :<\/p>\n<p>1- Am I doing something wrong? <\/p>\n<p>2- both inlet and outlet are open, so air is coming into my geometry from the inlet (because of velocity inlet) and exiting through the outlet with a relative humidity of 50%. However, I think since I am defining a Mass fraction of h2o of 0.00879 at the outlet, I am forcing the simulation to reach this level of humidity which is not what I am looking for. <\/p>\n<p><\/p>\n<\/p>\n<p>3- Is there any way to define the RH as 50% for the inlet velocity and let the system calculate it to the outlet? <\/p>\n<div data-embedjson=\"{&quot;url&quot;:&quot;\/forum\/wp-content\/uploads\/forum-uploads\/726\/W7B7XWICE66S.png&quot;,&quot;name&quot;:&quot;Capture.PNG&quot;,&quot;type&quot;:&quot;image\/png&quot;,&quot;size&quot;:56865,&quot;width&quot;:null,&quot;height&quot;:null,&quot;embedType&quot;:&quot;file&quot;}\">\n<a href=\"\/forum\/wp-content\/uploads\/forum-uploads\/726\/W7B7XWICE66S.png\" download aria-label=\"Capture.PNG\"><br \/>\nCapture.PNG<br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-168695","topic","type-topic","status-closed","hentry","topic-tag-cfd","topic-tag-simulation","topic-tag-species"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["904"],"_bbp_likes_count":["0"],"_bbp_subscription":["253952"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["168695"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","179842"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["212442"],"_bbp_last_active_id":["212442"],"_bbp_last_active_time":["2022-04-21 10:47:26"]},"test":"tsadeghi"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/168695","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/168695\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=168695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}