{"id":40798,"date":"2020-02-10T09:11:09","date_gmt":"2020-02-10T09:11:09","guid":{"rendered":"\/forum\/forums\/topic\/dissolved-oxygen-in-water-henrys-law\/"},"modified":"2020-02-10T09:11:09","modified_gmt":"2020-02-10T09:11:09","slug":"dissolved-oxygen-in-water-henrys-law","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dissolved-oxygen-in-water-henrys-law\/","title":{"rendered":"Dissolved oxygen in water- Henrys law"},"content":{"rendered":"<p>Hi I want to simulate the quantity of disolved oxygen in water depending on temperatura. I cr&eacute;ate my model but I have some problems, My model is the next one:<\/p>\n<p><\/p>\n<p>I create an eulerian multiphase model. My primary phase is water + disolved oxyegen (density depending on temperatura by udf) and my secondary phase is dummy oxygen + oxygen (volumen weighted density). Then I apply species mass transfer from water disolved oxygen to the gaseous oxygen and I act&iacute;vate henrys law. In my initialization conditions<span style=\"font-family: 'Open Sans',Arial,Helvetica,sans-serif;\"> I put the quantity of disolved oxygen of my primary phase (mass fraction of disolved oxygen = 0.0083) and the mass fraction of dummy oxygen = 1. Also I put a small quantity of volumen fraction of my secondary phase to act&iacute;vate the mass transfer (volumen fraction of secondary phase = 0,006). Then I simulate in transuient model because if I put steady because of the complexity of the simulation I have floating point errors. Is this model correct?<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-family: 'Open Sans',Arial,Helvetica,sans-serif;\">My results are not very logical, the mass fraction of my secondary phase (oxygen gas) always is 0 so the is no mass transfer from primary to secondary phase. Also the volumen fraction of my secondary phase is very small like maximun 1e-20. Why it can be the reason of that?<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-family: 'Open Sans',Arial,Helvetica,sans-serif;\">Thanks<\/span><\/p>\n","protected":false},"template":"","class_list":["post-40798","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["12978"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1479"],"_bbp_subscription":["247361"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["40798"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","173096"],"_bbp_voice_count":["3"],"_bbp_reply_count":["41"],"_bbp_last_reply_id":["106117"],"_bbp_last_active_id":["106117"],"_bbp_last_active_time":["2020-02-21 19:46:21"]},"test":"myke"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/40798","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\/40798\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=40798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}