{"id":294198,"date":"2023-07-21T01:31:31","date_gmt":"2023-07-21T01:31:31","guid":{"rendered":"\/forum\/forums\/topic\/the-reaction-rate-for-a-wall-surface-reaction\/"},"modified":"2023-07-21T01:31:31","modified_gmt":"2023-07-21T01:31:31","slug":"the-reaction-rate-for-a-wall-surface-reaction","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-reaction-rate-for-a-wall-surface-reaction\/","title":{"rendered":"The reaction rate for a wall surface reaction"},"content":{"rendered":"

Hello Ansys experts,<\/p>\n

I am modeling a wall surface reaction. Consider the chemical reaction ongoing on a surface is A (species in fluid) + B (site species) –> C (solid species);<\/p>\n

If I understand correctly, Ansys Fluent computes the reaction rate by R=k*c(A)*c(B), where k is the reaction constant, c(A) is the molar concentration in fluid in the unit [kmol\/m^3] and c(B) represents the site density in the unit [kmol\/m^2]. Neither the backward reaction nor coverage dependence was considered in this context.<\/p>\n

k and c(B) are both just inputs from me, and they are not changing throughout the simulation period if I understand correctly. Notice that the temperature exponent and activation energy for reactions are both zero in the current simulation.<\/p>\n

My question is<\/p>\n

    \n
  1. how Ansys Fluent selects c(A). Is it the molar concentration at the cell adjacent to the reaction surface?<\/li>\n
  2. If my understanding above is correct?<\/li>\n<\/ol>\n

    Thank you and regards<\/p>\n","protected":false},"template":"","class_list":["post-294198","topic","type-topic","status-closed","hentry","topic-tag-chemical-kinetics","topic-tag-wall-surface-reaction-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["18356","15977"],"_bbp_author_ip":["23.206.193.154"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2333"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["294198"],"_bbp_forum_id":["27792"],"_bbp_engagement":["15977","18356"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["294798"],"_bbp_last_active_id":["294798"],"_bbp_last_active_time":["2023-07-26 01:10:34"]},"test":"weiorbisdiagnostics-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/294198","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\/294198\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=294198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}