Hello, <\/p>\n
I am trying to simulate flashing flow conditions in a pipe. It is a 2-D simulation. Till now, I have used Mixture Model>Evaporation-condensation Model>Lee Model (with UDF for Saturation Temeprature and Eulerian Model>Evaporation-Condensation Model>Lee Model (along with UDF for saturation Temperature). The convergence for both of these cases are good with quite low residuals but, I am not getting chocked flow\/flashing conditions i.e. the velocity of the vapour phase is not reaching mach conditions as we expect them to. I am using pressure inlet with 100 bars inlets pressure and 583.15 K Temperature and 1 bar at the outlet with backflow temperature set at 500 K. Moreover, I am using UDFs for both water and vapour materials property ranging from 275 K till 635 K saturation conditions.<\/p>\n
What can I do so that I can have choked\/flashing in the pipe and the velocities reach higher values. I am using SST k-omega model right now. Can someone give me some advice. I can post the images of the simulation set-up if required. <\/p>\n
Currently, I am trying with Eulerian>Evaporation-Condensation>Thermal Phase change (didnot change the tuning factor) along with two-resistance model. The velocities are now reaching almost 290m\/s as compared to 180-200 m\/s of the previous models but still not as we expect. But, the residulas are quite high in this case.<\/p>\n
Can someone please provide some suggestions and help me out.<\/p>\n
Thanks in advance.<\/p>\n","protected":false},"template":"","class_list":["post-327331","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["303520","199"],"_bbp_author_ip":["96.7.74.173"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1676"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["327331"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","303520"],"_bbp_voice_count":["2"],"_bbp_reply_count":["18"],"_bbp_last_reply_id":["341541"],"_bbp_last_active_id":["341541"],"_bbp_last_active_time":["2023-12-21 12:08:58"]},"test":"sharandeet-singhlut-fi"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/327331","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\/327331\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=327331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}