{"id":34768,"date":"2019-04-16T19:49:03","date_gmt":"2019-04-16T19:49:03","guid":{"rendered":"\/forum\/forums\/topic\/wall-boundary-mass-flux\/"},"modified":"2019-04-16T19:49:03","modified_gmt":"2019-04-16T19:49:03","slug":"wall-boundary-mass-flux","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/wall-boundary-mass-flux\/","title":{"rendered":"Wall boundary mass flux ?"},"content":{"rendered":"<p>Suppose in a single phase problem&#8230;.. some reaction are happening and the products produced needs to diffuse out through the outer wall&#8230;&#8230;..<\/p>\n<p>Generally in any case when we need a mass transfer across a wall when species transport is enabled&#8230;&#8230;. there is an option under wall boundary condition &#8211; species- specify mass fraction or zero diffusing flux etc<\/p>\n<p>For eg if I specify 0 for a particular  species A their then that means outside the wall A overall mass fraction is 0 and diffusion will happen from higher to lower concentration  rt ! But my question is  what is the rate at which this transport will happen &#8230;&#8230;.. how does fluent determines the mass transfer coefficient for this scenario ?<\/p>\n","protected":false},"template":"","class_list":["post-34768","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["6940"],"_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","0"],"_btv_view_count":["1794"],"_bbp_subscription":["235690"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["34768"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","155620","168265"],"_bbp_voice_count":["4"],"_bbp_reply_count":["17"],"_bbp_last_reply_id":["114375"],"_bbp_last_active_id":["114375"],"_bbp_last_active_time":["2020-05-13 15:29:52"]},"test":"sooraj546"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/34768","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\/34768\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=34768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}