{"id":37545,"date":"2019-09-06T18:55:42","date_gmt":"2019-09-06T18:55:42","guid":{"rendered":"\/forum\/forums\/topic\/porous-zone-model-equations-questions-about-calculations\/"},"modified":"2019-09-06T18:55:42","modified_gmt":"2019-09-06T18:55:42","slug":"porous-zone-model-equations-questions-about-calculations","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/porous-zone-model-equations-questions-about-calculations\/","title":{"rendered":"Porous Zone Model Equations – Questions about calculations"},"content":{"rendered":"

Hello and thank you for taking the time to look at my questions. They are relating to understanding the porous zone calculations undertaken by Fluent during a simulation. <\/p>\n

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1). When Fluent calculates the variable Y_i in calculations involving a porous zone (such as in the species transport equation 7-1 in the Fluent theory guide), is Y_i calculated as (mass of species i)\/(mass of fluid) or is it related to a total mass that includes the mass of the fluid and solid in the porous zone?<\/p>\n

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2). How does the momentum source term in equation 6-1 (from the user’s guide) play a role in Fluent’s calculations? I notice that a source term S_i is included in the species transport equation (equation 7-1 in the theory guide), but I do not see any source term in the momentum equation (equation 1-3 in the theory guide). Where exactly is equation 6-1 used in Fluent? <\/p>\n

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3). For equation 6-12 in the user’s guide, why is it helpful to multiple rho and Yi by the porosity in the time derivative?  That appears to put the equation in terms of the derivative of the (mass of i per total volume) with respect to time, but why is that more helpful than having the equation be in terms of the (mass of i per volume of fluid)?  I do not believe that I fully understand what the porous zone model is trying to achieve, and would appreciate any help in describing that.<\/p>\n

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Again, I really appreciate the help. Please let me know if something I have written needs clarification. <\/p>\n","protected":false},"template":"","class_list":["post-37545","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["9723"],"_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":["918"],"_bbp_subscription":["242462"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["37545"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","168004"],"_bbp_voice_count":["3"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["94007"],"_bbp_last_active_id":["94007"],"_bbp_last_active_time":["2019-09-10 20:32:35"]},"test":"rgdiscovery"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37545","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\/37545\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=37545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}