{"id":33052,"date":"2019-02-04T20:25:03","date_gmt":"2019-02-04T20:25:03","guid":{"rendered":"\/forum\/forums\/topic\/particle-trajectory-and-tracking\/"},"modified":"2019-02-04T20:25:03","modified_gmt":"2019-02-04T20:25:03","slug":"particle-trajectory-and-tracking","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/particle-trajectory-and-tracking\/","title":{"rendered":"Particle trajectory and tracking"},"content":{"rendered":"<p>I am trying to do a eulerian DDPM simulation but my particles never seem to go through my geometry entirely. They seem to stop slightly above my inlet to the geometry (see picture below).&nbsp;<img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/88418195-cc40-4dcb-9b72-a9d1000d2e6f\/82be36a6-6b11-4c3b-92ce-a9ea0150420c_dpm-velocity-mag.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>The console read this message when I was analyzing the solution with particle tracks:&nbsp;<\/p>\n<p><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt;\"><span style=\"font-size: 11pt; font-family: Arial; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;\">WARNING: 100.0000% of the total discrete phase mass was not tracked for the expected residence time:<\/span><\/p>\n<p><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt;\"><span style=\"font-size: 11pt; font-family: Arial; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;\">0.01 s less on a mass-weighted average (which is 2.1770% of their total age or 100.0000% of the last time step).<\/span><\/p>\n<p><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt;\"><span style=\"font-size: 11pt; font-family: Arial; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;\">You may be able to reduce this discrepancy by changing the tracking parameters, that is,<\/span><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt;\"><span style=\"font-size: 11pt; font-family: Arial; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;\">increasing the maximum number of time steps used to compute a single particle trajectory.<\/span><\/p>\n<p><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt;\">&nbsp;<\/p>\n<p><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt;\"><span style=\"font-size: 11pt; font-family: Arial; color: #000000; background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;\">Where do you make this change and how large a value should I use?<\/span><\/p>\n","protected":false},"template":"","class_list":["post-33052","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["5224"],"_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":["1228"],"_bbp_subscription":["238331"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["33052"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","161650"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["77467"],"_bbp_last_active_id":["77467"],"_bbp_last_active_time":["2019-02-11 09:41:59"]},"test":"designteam2"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/33052","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\/33052\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=33052"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}