Hello,<\/p>\n
I’m wondering if someone would be able to explain a bit more about the theory behind the mixture model for multiphase flow in Fluent and how it works when the Shnerr-Sauer cavitation model is employed. After reading through the Fluent Theory Guide, I can understand that a transport equation for the vapor volume fraction is solved along with Navier-Stokes and continuity. I also understand that there is some consideration of bubble dynamics according to the Rayleigh-Plesset equation when the Schnerr-Sauer cavitation model is selected. However, I’m confused as to how the Rayleigh-Plesset considerations fit into the solution procedure and how it connects to the solution of the vapor volume fraction.<\/p>\n
There is a setting for the “Diameter” in the definition of the secondary phase, which is treated as a constant value unless a user-defined function is specified. There is also a bubble number density input for the cavitation model. So, does the program initialize a certain number of bubbles within a local region according to this bubble number density and diameter? Then from this is the vapor volume fraction calculated?<\/p>\n
I understand that the bubbles are not tracked and interfaces are not resolved. However, if the diameter value is constant over time, how can the local vapor volume fraction change?<\/p>\n
Many thanks,<\/p>\n
cbra_8<\/p>\n","protected":false},"template":"","class_list":["post-284295","topic","type-topic","status-closed","hentry","topic-tag-multiphase_models-1","topic-tag-fluent"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["232178","199"],"_bbp_author_ip":["23.39.172.22"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2505"],"_edit_lock":["1684260656:147427"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["284295"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","232178"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["285903"],"_bbp_last_active_id":["285903"],"_bbp_last_active_time":["2023-05-26 08:41:26"]},"test":"cbradtmit-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/284295","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\/284295\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=284295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}