{"id":317908,"date":"2023-11-16T03:26:34","date_gmt":"2023-11-16T03:26:34","guid":{"rendered":"\/forum\/forums\/reply\/317908\/"},"modified":"2023-11-16T08:04:28","modified_gmt":"2023-11-16T08:04:28","slug":"317908","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/317908\/","title":{"rendered":"Reply To: VOF evaporation problem"},"content":{"rendered":"<p>&lt;p&gt;Just did the Eulerian simulation, and the result gets even weirder. Still no vapor formed even when the evaporation frequency increased to 4 million s-1 even though the temperature around the inlet (note that this is <em>water phase<\/em> temperature) increased to whooping 1500 K (I stopped the simulation when this happened, at physical time of around 0.1s. Perhaps I still missed something here?&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104522-VOF water.png\" alt=\"\" width=\"386\" height=\"197\" \/><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104558-VOF nh3vap.png\" alt=\"\" width=\"369\" height=\"188\" \/>&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104742-temp contour.png\" alt=\"\" width=\"377\" height=\"163\" \/>&lt;\/p&gt;&lt;p&gt;Here&rsquo;s the multiphase setting for the Eulerian simulation:&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104812-setting01.png\" alt=\"\" width=\"403\" height=\"461\" \/><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104842-setting02.png\" alt=\"\" width=\"394\" height=\"450\" \/>&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104878-setting03.png\" alt=\"\" width=\"405\" height=\"464\" \/><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104907-setting04.png\" alt=\"\" width=\"387\" height=\"428\" \/>&lt;\/p&gt;&lt;p&gt;Inlet boundary condition:&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104947-inlet BCUntitled.png\" alt=\"\" width=\"422\" height=\"171\" \/>&lt;\/p&gt;&lt;p&gt;Initialization setting:&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700104986-init_merged.png\" alt=\"\" width=\"442\" height=\"333\" \/>&lt;\/p&gt;&lt;p&gt;Note that I added an initialization patch at the region just above the inlet (which the simulation immediately crashed without), which entails vertical (z-direction) velocity of liquid ammonia.&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700105135-init_patch.png\" alt=\"\" width=\"412\" height=\"296\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<strong>Edit:<\/strong> The evaporation didn&rsquo;t also occur regardless of the evaporation frequency input (I tried all the way to outrageously high values like 4e+11 s-1). I guess for some reasons (maybe in three-phase or more cases) the evaporation transfer is inadvertently turned off, no?&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-317908","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/317908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/317908\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=317908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}