{"id":413032,"date":"2025-02-11T13:55:38","date_gmt":"2025-02-11T13:55:38","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/multiphase-boiling-model\/"},"modified":"2025-02-11T15:20:34","modified_gmt":"2025-02-11T15:20:34","slug":"multiphase-boiling-model","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/multiphase-boiling-model\/","title":{"rendered":"Multiphase Boiling Model"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;I am trying to simulate the boiling of water in a rectungular duct. I am using Eulerian Approach ( RPI boiling Model). i have my phase 1 as water liquid and phase 2 as water vapour with linearly varying densities, Cp, K and viscosities. and there is a &#8220;liquid Interface transfer Coefficient&#8221; in Mass Trasnfer Boiling settings, which cant be found either in fluent user guide or thoery guide. i dont know what this does and how to set it. i kindly request if anyone who already faced this issue and resolved. please give your inputs on this. and i tried changing this value from 1,10,100,1000,100000. but there are flucations in energy and turbulence of phase 2 and the simulation is crashing.( floating point error). &lt;br&gt;&lt;br&gt;&lt;br&gt;I have my boundary conditions as following:&lt;\/p&gt;&lt;p&gt;&lt;br&gt;Inlet-mass flow inlet-100kgs\/s.&lt;br&gt;Outlet- pressure outlet.&lt;br&gt;Heated wall &#8211; heat flux-416666.6 W\/m2. i.e 1000W on my area of heated wall.&lt;br&gt;and all the other walls are adiabatic.&lt;br&gt;&lt;br&gt;&lt;\/p&gt;&lt;p&gt;Mesh.&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/02\/11-02-2025-1739281970-half model mesh.PNG\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/02\/11-02-2025-1739281994-half model mesh cell quality.PNG\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;And in addition i would appreciate if you can provide any inputs on Forces. Like drag, Lift coefficients. and if i should use virtual mass and Interfecial Area Concentration Models.&lt;\/p&gt;&lt;p&gt;Thank You.&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-413032","topic","type-topic","status-publish","hentry","topic-tag-boiling-flow-in-fluent","topic-tag-eulerian-multiphase"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["413032"],"_bbp_subscription":["514742","199"],"_bbp_author_ip":["62.159.84.210"],"_bbp_last_reply_id":["416938"],"_bbp_last_active_id":["416938"],"_bbp_last_active_time":["2025-02-12 11:15:52"],"_bbp_reply_count":["7"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["514742","199"],"_btv_view_count":["492"],"_bbp_topic_status":["unanswered"],"_edit_last":["514742"],"_bbp_revision_log":["a:1:{i:413208;a:2:{s:6:\"author\";i:514742;s:6:\"reason\";s:0:\"\";}}"]},"test":"viswanath-ashish123gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/413032","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/413032\/revisions"}],"predecessor-version":[{"id":413208,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/413032\/revisions\/413208"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=413032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}