{"id":278082,"date":"2023-04-06T08:29:26","date_gmt":"2023-04-06T08:29:26","guid":{"rendered":"\/forum\/forums\/topic\/abnormally-slow-computation-speed\/"},"modified":"2023-04-06T08:29:26","modified_gmt":"2023-04-06T08:29:26","slug":"abnormally-slow-computation-speed","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/abnormally-slow-computation-speed\/","title":{"rendered":"Abnormally slow computation speed"},"content":{"rendered":"<p>Hi !<\/p>\n<p>I&#8217;m trying to simulate the lorentz force on an actuator between two magnets. This is a transient solver simulation.<\/p>\n<p>My 3D model is ridiculously slow and I don&#8217;t understand why&#8230; Here is what I have done so far:<\/p>\n<ul>\n<li>reduced the number of mesh to 500 000<\/li>\n<li>Allowed for 4 cores, 90% RAM limit and GPU use in Analysis configuration<\/li>\n<li>Set the power management mode of my GPU to &ldquo;Prefer maximum performance&rdquo;I have reduced the number meshes to 500 000, which shouldn&#8217;t be any problMy 2D<\/li>\n<\/ul>\n<p>What I notice is that is it very slow (more than 5min) to even get actually started on the simulation (reading file, etc&#8230;) despite mesh generation very smooth and nice look when plotting the mesh. Then it start solving where CPU use goes from 15% to around 50-70%, GPU oscillates between 5-50% with peaks close to 100% and the memory usage is over 90%&#8230; Then it doesn&#8217;t even reach time step 0s but crashes before with the following error message:<\/p>\n<p>&#8220;3dtds terminated abnormally&#8221;<\/p>\n<p>My desktop config is: 16GB RAM, SSD 239 GB, GPU NVIDIA Quadro K620, Windows 10, 4 cores CPU<\/p>\n<p>To explore what could be wrong I have tried a 2D equivalent model with finner mesh with a total of 400 000 meshes, so very close to the 3D model. When solving the 2D model everything goes fine with CPU use of 15-30%,GPU 0-2% and memory usage of 33%.<\/p>\n<p>Does anyone know what could be the reason for this problem ? any help would be a lot !<\/p>\n<p>Thanks !<\/p>\n<p>Antoine<\/p>\n","protected":false},"template":"","class_list":["post-278082","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["270917","602"],"_bbp_author_ip":["23.56.168.190"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1181"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["278082"],"_bbp_forum_id":["27793"],"_bbp_engagement":["602","270917"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["279880"],"_bbp_last_active_id":["279880"],"_bbp_last_active_time":["2023-04-17 20:20:39"]},"test":"antoine-dupuisangstrom-uu-se"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/278082","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\/278082\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=278082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}