{"id":251022,"date":"2023-02-22T14:26:25","date_gmt":"2023-02-22T14:26:25","guid":{"rendered":"\/forum\/forums\/topic\/fdtd-3d-convergence\/"},"modified":"2023-02-22T14:29:58","modified_gmt":"2023-02-22T14:29:58","slug":"fdtd-3d-convergence","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-3d-convergence\/","title":{"rendered":"FDTD 3D convergence"},"content":{"rendered":"<p>Hi, thanks in advance for your attention.<br \/>I am using FDTD 3D in Lumerical to model and analyze a Multi-Mode Interferometer coupler but the simulation stops for divergence when it is 60\/70% of the total simulation time.<br \/>I have tried to change the mesh setting by using a dense mesh and a less dense mesh, or by increasing the distance of the boundaries in the simulation region but still same errors occur.<br \/>I will show some pictures about the setting and the structure implemented.<br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/22-02-2023-1677076070-wa1.png\" alt=\"\"><br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/22-02-2023-1677076088-wa2.png\" alt=\"\"><br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/22-02-2023-1677076107-wa3.png\" alt=\"\"><br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/22-02-2023-1677076125-wa4.png\" alt=\"\"><br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/22-02-2023-1677076142-wa5.png\" alt=\"\"><br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/02\/22-02-2023-1677076160-wa6.png\" alt=\"\"><br \/>Best regards<br \/>Thanks in advance for your availability.<\/p>\n","protected":false},"template":"","class_list":["post-251022","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com 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