{"id":305419,"date":"2023-09-07T21:59:34","date_gmt":"2023-09-07T21:59:34","guid":{"rendered":"\/forum\/forums\/topic\/view-factor-calculation-in-parallel-mode\/"},"modified":"2023-10-07T18:47:15","modified_gmt":"2023-10-07T18:47:15","slug":"view-factor-calculation-in-parallel-mode","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/view-factor-calculation-in-parallel-mode\/","title":{"rendered":"View factor calculation in parallel mode"},"content":{"rendered":"<p>Hello,<\/p>\n<p>I am building a model where I have defined several closed enclosure radiation boundary conditions. I have been reading at Mechanical APDL Command and Theory Reference about the view factor calculation and I am interested in using the view factor condensation.<\/p>\n<p>As far I know, the VFCO command defines the level of view factor condensation and then, the view factor matrix should be generated by VFOPT,NEW or by SOLVE. As it is written at the VFOPT Command Reference:<\/p>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/p>\n<p>For 3-D analyses, two options are available for calculating view factors when running Distributed Ansys:<\/p>\n<div class=\"itemizedlist\">\n<ul class=\"itemizedlist\" type=\"disc\">\n<li class=\"listitem\">\n<p>Issue a&nbsp;<a class=\"link\" title=\"SOLVE\" href=\"https:\/\/ansyshelp.ansys.com\/Views\/Secured\/corp\/v221\/en\/ans_cmd\/Hlp_C_SOLVE.html\" target=\"_self\" rel=\"noopener\"><span class=\"command\"><strong>SOLVE<\/strong><\/span><\/a>&nbsp;command &#8212; View factors are calculated in parallel mode if no view factors were previously calculated.<\/p>\n<\/li>\n<li class=\"listitem\">\n<p>Issue a&nbsp;<span class=\"command\"><strong><span class=\"highlight\">VF<\/span>OPT<\/strong><\/span>,NEW command &#8212; View factors are calculated in serial mode.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n<p>https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v221\/en\/ans_cmd\/Hlp_C_VFOPT.html?q=vf<\/p>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/p>\n<p>The matter is that it seems that the only way to trigger the calculation of the view factor matrix with condensation is with an argument in the VFOPT command (VFOPT,NEW,,,,,,ON), which will be performed in serial mode.<\/p>\n<p>So, my question is:<\/p>\n<p>Anyone knows if there is any way to perform the view factor condensed matrix in parallel mode? For my simulation purpose, it will be great to use the condensed view factor matrix but calculate it in serial mode would weigh down the simulation time.<\/p>\n<p>Thank you for your time reading this post.<\/p>\n<p>Best regards,<\/p>\n<p>Antonio Zamora.<\/p>\n","protected":false},"template":"","class_list":["post-305419","topic","type-topic","status-closed","hentry","topic-tag-thermal-radiation-1","topic-tag-DistributedMemoryParallel-1","topic-tag-enclosure","topic-tag-view-factor-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["292544","20905"],"_bbp_author_ip":["23.52.43.88"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["984"],"_edit_lock":["1694124152:229501"],"_oembed_81e4623320b8920e1696fccb610935e2":["{{unknown}}"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["305419"],"_bbp_forum_id":["27791"],"_bbp_engagement":["20905","292544"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["310510"],"_bbp_last_active_id":["310510"],"_bbp_last_active_time":["2023-10-07 18:47:09"],"_oembed_50726c9105efd7a24ccf17db5ca0564e":["{{unknown}}"]},"test":"azjiac-es"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/305419","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\/305419\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=305419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}