{"id":31024,"date":"2018-10-20T15:25:11","date_gmt":"2018-10-20T15:25:11","guid":{"rendered":"\/forum\/forums\/topic\/dpm-or-ddpm-dem-to-model-flow-of-water-and-sand-particles-in-pipe\/"},"modified":"2018-10-20T15:25:11","modified_gmt":"2018-10-20T15:25:11","slug":"dpm-or-ddpm-dem-to-model-flow-of-water-and-sand-particles-in-pipe","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dpm-or-ddpm-dem-to-model-flow-of-water-and-sand-particles-in-pipe\/","title":{"rendered":"DPM or DDPM-DEM to model flow of water and sand particles in pipe ?"},"content":{"rendered":"

Hi everyone,<\/p>\n

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I’m trying to model the flow of water and sand in 3D pipe with three side openings ( perforations) as shown in the following picture. The three holes are marked with the letters (A,B,C) and the other side of the pipe near hole C is plugged. The first objective is to estimate how much sand will escape from each hole.<\/p>\n

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Case Parameters:<\/p>\n

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Inlet (velocity-inlet B.C) with velocity = 8.617 ft\/sec and reflect DPM B.C <\/p>\n

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outlet (pressure outlet B.C) with 0 gauge pressure and escape DPM B.C <\/p>\n

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Sand Injection is at the inlet face at the same velocity of the fluid (8.617 ft\/sec) at flow rate of (22.4 lb\/sec)<\/p>\n

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I’m having difficulty to get a converged solution using DPM without DEM collision and with steady particle tracking. Allowing DEM collision and tracking the particle in unsteady mode seems to be easier to get a converged solution but I have not gotten any yet.<\/p>\n

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Here are some questions I have:<\/p>\n

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– With such dense particle concentration will the DPM work ? or it is still considered to be a dilute fluid ?<\/p>\n

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– How can I model this problem using DDPM-DEM ? is the right model to handle such case ?<\/p>\n

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– Any tips to reach a convergence ( particle time step size, number of time steps, tracking parameters, Parcels, etc…. )<\/p>\n

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Thanks for your help<\/p>\n

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 <\/p>\n","protected":false},"template":"","class_list":["post-31024","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["3196"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["2571"],"_bbp_subscription":["237462"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["31024"],"_bbp_forum_id":["27792"],"_bbp_engagement":["25","62","22555","159623"],"_bbp_voice_count":["4"],"_bbp_reply_count":["18"],"_bbp_last_reply_id":["67860"],"_bbp_last_active_id":["67860"],"_bbp_last_active_time":["2018-10-29 15:50:52"]},"test":"almulhem_900"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/31024","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\/31024\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=31024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}