{"id":247738,"date":"2023-01-27T13:34:33","date_gmt":"2023-01-27T13:34:33","guid":{"rendered":"\/forum\/forums\/topic\/lumerical-mode-varfdtd-running-simulation-maximum-size-limit\/"},"modified":"2023-03-14T04:44:02","modified_gmt":"2023-03-14T04:44:02","slug":"lumerical-mode-varfdtd-running-simulation-maximum-size-limit","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/lumerical-mode-varfdtd-running-simulation-maximum-size-limit\/","title":{"rendered":"Lumerical MODE varFDTD running simulation maximum size limit"},"content":{"rendered":"<p>I am currently trying to simulate light propagation thru a Mach Zehnder Interferometer (MZI) polymer based waveguide for heavy metal sensing.<\/p>\n<p>Right now, i am facing problem when trying to simulate a 5000 um x 5000 um and bigger design sizes. My workstation laptop became so laggy or at certain time, it ran out of memory and unable to complete the simulation.<\/p>\n<p>My workstation laptop spec is as follows:<\/p>\n<p>Lenovo P14S Gen 2<\/p>\n<p>Intel i5 11th gen 1135G7 CPU (4 cores 8 threads) | 40GB DDR4 RAM | Nvidia T500 4GB DDR5 discrete graphics card&nbsp;<\/p>\n<p><img decoding=\"async\" title=\"the device\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/01\/27-01-2023-1674825640-mzi.jpg\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"components\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/01\/27-01-2023-1674825694-components.jpg\" alt=\"\"><\/p>\n<p>Here are some parameters that i used for the simulation:<\/p>\n<p>Substrate Silicon (Si) = 5.5 um thick | Silicon Dioxide (SiO2) = 4.5 um thick&nbsp;<\/p>\n<p>core &#8211; SU8 = 4 um width, 4 um height<\/p>\n<p>cladding &#8211; air<\/p>\n<p>i&#8217;ve tried changing the settings in varFDTD &#8211; Mesh step from 1e-6 right up to 0.1.<\/p>\n<p>is there any other parameters that i should look into? or varFDTD has device size limitation for the simulation to run successfully? or i need to get a better workstation spec?<\/p>\n<p>Appreciate your help. Thanks.&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-247738","topic","type-topic","status-closed","hentry","topic-tag-varFDTD-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["273443","2592"],"_bbp_author_ip":["23.223.149.174"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["899"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["247738"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","273443"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["247769"],"_bbp_last_active_id":["247769"],"_bbp_last_active_time":["2023-01-27 19:16:24"]},"test":"azarulsaniunimap-edu-my"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/247738","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\/247738\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=247738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}