{"id":318804,"date":"2023-11-21T12:48:31","date_gmt":"2023-11-21T12:48:31","guid":{"rendered":"\/forum\/forums\/reply\/318804\/"},"modified":"2023-11-21T13:05:09","modified_gmt":"2023-11-21T13:05:09","slug":"318804","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/318804\/","title":{"rendered":"Reply To: Periodic boundary condition for droplet evaporation"},"content":{"rendered":"

<p>thank you so much, for compressible flow, it is recommended to use total pressure and a zero operating pressure, <\/p><p>for incompressible flow, we break the total pressure into a non-zero operating pressure and a relative pressure (the static pressure), to reduce the numerical errors<\/p><p>1)what about evaporation in my problem, when using the VOF model, while the water vapor phase is considered to have a fixed density?<\/p><p>in evaporation, <\/strong>shall I still use a non-zero operating density<\/strong>+static pressure<\/strong>?<\/p><p>if so, or in my case as it is open to the atmosphere, the pressure outlet BCs would be zero<\/p><p> <\/p><p>2)<\/strong>Also, in the below image, for the Boussinisque parameters<\/strong>, everything is correctly set (the minimum phase average method<\/strong>)?<\/p><p> <\/p><p>3)<\/strong>what about the operating temperature<\/strong>?<\/p><p>shall I set the evaporation temperature (the saturation temperature<\/strong>) for that which 373.15 is<\/p><p>or the hot plat temperature<\/strong> which 373.15+8 is.<\/p><p>which one do you recommend?<\/p><p> <\/p><p>4)<\/strong>Technically using a fixed density<\/strong> for the vapor water<\/strong> phase is correct for evaporation<\/strong>? (in this range of temperature<\/strong> 373.15+8=hotplate)<\/p><p>what if the evaporation frequency<\/strong> is high<\/strong> like 10^4, Does it influence<\/strong> your answer?<\/p><p>I read some discussions of your and DrAmine answers had about the evaporation frequency and LEE model<\/p><p>one that could find it now was this<\/p><p>\/forum\/forums\/topic\/source-term-in-stefan-problem\/<\/p><p>I wonder if you could help me with these questions, to save <\/strong>your time<\/strong> and other people<\/strong>s will search <\/strong>and face the same questions, I numbered the questions<\/p><p><\/p><p> <\/p><p> <\/p><p> <\/p><\/p>\n","protected":false},"template":"","class_list":["post-318804","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t