{"id":430087,"date":"2025-04-25T19:40:26","date_gmt":"2025-04-25T19:40:26","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/efficient-output-file-management-and-restart-in-ansys-fluent\/"},"modified":"2025-04-25T19:40:26","modified_gmt":"2025-04-25T19:40:26","slug":"efficient-output-file-management-and-restart-in-ansys-fluent","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/efficient-output-file-management-and-restart-in-ansys-fluent\/","title":{"rendered":"Efficient Output File Management and Restart in ANSYS Fluent."},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;br&gt;&lt;br&gt;I run my ANSYS Fluent simulations on a supercomputer and need to write output files every 0.001 seconds to obtain the right information I need for post-processing. Currently, I generate both .cas.h5 (to enable restart) and .dat.h5 files at each step, but this results in a huge number of files and significantly slows down my simulation. For post-processing, I only need velocity and pressure data (using Tecplot 360), but Fluent writes 80+ variables by default.&lt;br&gt;&lt;br&gt;My questions:&lt;br&gt;&lt;br&gt;Is it possible to write only the .dat.h5 file at every timestep, and just the necessary .cas.h5 files for restart? Will this still allow me to restart the simulation from the last saved step?&lt;br&gt;&lt;br&gt;Can I limit the variables written to the .dat.h5 files to only certain variables , to reduce file size and speed up simulations? If so, how can I set this up?&lt;\/p&gt;&lt;p&gt;Any guidance on efficient file management and restart strategies would be greatly appreciated!&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-430087","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["430087"],"_bbp_subscription":["544680","8124"],"_bbp_author_ip":["66.7.118.66"],"_bbp_last_reply_id":["430979"],"_bbp_last_active_id":["430979"],"_bbp_last_active_time":["2025-05-07 14:54:46"],"_bbp_reply_count":["6"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["544680","8124"],"_btv_view_count":["579"],"_bbp_topic_status":["unanswered"]},"test":"livingquarshiegmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/430087","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\/430087\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=430087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}