{"id":292441,"date":"2023-07-11T07:26:33","date_gmt":"2023-07-11T07:26:33","guid":{"rendered":"\/forum\/forums\/reply\/292441\/"},"modified":"2023-07-11T07:30:37","modified_gmt":"2023-07-11T07:30:37","slug":"292441","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/292441\/","title":{"rendered":"Reply To: Why FDE Eigen mode solver is giving different solution than Comsol FEM solver?"},"content":{"rendered":"<p>&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Thank you fro your suggestion. Sorry for the confusion about the mesh size. Please look at the below results for a mesh size of 98 nm.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/11-07-2023-1689059864-Ansys_ques2.PNG\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;I see a difference in the results in cylindrical co-ordinate system but they are not proper modes as like as cartesian co-or. But What I understand is the eigen mode solver solves Maxwells equations in the respective co-ordinate system based on the symmetry of the structure that whatever the structure we create. If it is cylindrical symmetry, the solver solves in cylindrical co-or sys. Am I correct ? The x,y and z axes are just for the representation of geometrical co-ordinates. Please clarify.&lt;\/p&gt;&lt;p&gt;I tried searching for 500 modes and looking for the higher order mode corresponding to lower effective index.&lt;\/p&gt;&lt;p&gt;I see some closure results as similar as Comsol results but the extra garbage fields are coming in the straight waveguide region. How to reduce these fields ? What should be the cause of this ?&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-292441","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/292441","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/292441\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=292441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}