


{"id":298986,"date":"2023-08-09T13:17:13","date_gmt":"2023-08-09T13:17:13","guid":{"rendered":"\/forum\/forums\/topic\/reinject-bc-with-ddpm\/"},"modified":"2023-08-09T13:17:13","modified_gmt":"2023-08-09T13:17:13","slug":"reinject-bc-with-ddpm","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/reinject-bc-with-ddpm\/","title":{"rendered":"Reinject BC with DDPM"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I am trying to simulate a circulating fluidized bed with the DDPM model. I only model the riser, so I want to recirculate the particles that exit at the top back to the bottom of the domain. To achieve this I use a Volume injection to generate the initial particles and the Reinject boundary condition on the outlet. I have a &#8220;Reinjection Only&#8221; Surface-Injection on a plane on the Wall of the domain to reinsert the particle into the domain. This works fine when using the DPM model but when I activate DDPM and set the Discrete Phase Domain for the initial injection, it doesn&#8217;t work anymore. That is, the simulation runs fine, but particles that leave through the outlet just disappear, so they don&#8217;t appear back in the domain. In the console the &#8220;number tracked&#8221; decreases, but there are no messages like &#8220;escaped&#8221;. If I print a &#8220;DPM Summary&#8221; the particles are identified as &#8220;Reinject&#8221; as would be expected, the only problem being that they are not actually reinjected.<\/p>\n<p>Does the Reinject boundary work at all with DDPM, and if so what am I missing?<\/p>\n<p>Thanks for the help!<\/p>\n","protected":false},"template":"","class_list":["post-298986","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi,I am trying to simulate a circulating fluidized bed with the DDPM model. I only model the riser, so I want to recirculate the particles that exit at the top back to the bottom of the domain. 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