{"id":47033,"date":"2020-08-04T19:56:36","date_gmt":"2020-08-04T19:56:36","guid":{"rendered":"\/forum\/forums\/topic\/mass-transfer-with-convection-diffusion-and-wall-flux\/"},"modified":"2020-08-04T19:56:36","modified_gmt":"2020-08-04T19:56:36","slug":"mass-transfer-with-convection-diffusion-and-wall-flux","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mass-transfer-with-convection-diffusion-and-wall-flux\/","title":{"rendered":"Mass transfer with Convection-Diffusion and Wall flux"},"content":{"rendered":"<p>Hello everyone!nI am simulating blood flow in a vein (3D). I want to calculate the oxygen transport happening in the vein, where oxygen is absorbed by the vein walls. I felt this was a straight forward problem where I can add the diffusion coefficient, inlet oxygen concentration in the blood, whether oxygen is also transported by convection and the wall boundary condition as mass flux or a reaction. nI was able to simulate this problem with out the wall boundary condition. I gave the inlet BC for oxygen as a specific mass fraction. The diffusivity was defined in the material definition dialog box. And I solved the setup, which gave uniform distribution of oxygen in the vessel,nI am having confusion in giving the wall BC. Do I need to choose wall surface reactions? what about solid species (used for species deposition) and site species (for wall surface reaction)? I do not find an option to give the wall flux\/reaction at wall boundary condition options.nMass transfer was very straight forward in another numerical software in which I had simulated the 2D problem, am I missing something in ANSYS?nAny help will be much appreciatedn<\/p>\n","protected":false},"template":"","class_list":["post-47033","topic","type-topic","status-closed","hentry","topic-tag-mass-transfer","topic-tag-species-diffusion"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["19228"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":["??\u0003?"],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1278"],"_bbp_subscription":["237283"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["47033"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","159353"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["123636"],"_bbp_last_active_id":["123636"],"_bbp_last_active_time":["2020-08-06 13:33:41"]},"test":"nkrpandian"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/47033","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\/47033\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=47033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}