{"id":370501,"date":"2024-07-04T14:07:29","date_gmt":"2024-07-04T14:07:29","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/issue-calculating-the-reynolds-no-in-fluent\/"},"modified":"2024-07-04T14:07:29","modified_gmt":"2024-07-04T14:07:29","slug":"issue-calculating-the-reynolds-no-in-fluent","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/issue-calculating-the-reynolds-no-in-fluent\/","title":{"rendered":"Issue calculating the Reynolds no. in Fluent"},"content":{"rendered":"<p>Hi! I noticed something strange in my Reynolds output parameter, with the order of magnitude being way off.<br \/>If I compute it at the end of the simulation, I get 200<strong>%<\/strong> instead of 20&#8217;000. The fact it displays the result as a percentage is weird in its own right, since I did not specify that in the expression.<\/p>\n<p>I then tried to individually compute the density and molecular viscosity and everything is alright (I get <em>10^-2<\/em> and <em>10^-8<\/em> values, respectively).<br \/>But if I try to compute the ratio, this is what happens:<br \/><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/04-07-2024-1720102041-glitch Fluent.jpg\" alt=\"\"><\/p>\n<p>I get 1 with unit of measure [kg\/n*m*s] and I have no idea what that&nbsp;<em>n<\/em>&nbsp;stands for.<br \/>It almost seems to me that is confuses the memory location for the real number values of viscosity and density, but again, there&#8217;s that <em>n<\/em> among the units of measure to keep in consideration. I will again stress that when including velocity and diameter in the complete Reynolds formula, with their right units of measure, I get a wrong, percentage value.<\/p>\n<p>There might be some major mistake\/oversight on my part, but still, anyone has an idea of what&#8217;s going on?<\/p>\n<p>P.S. I also tried remaking all those variables from scratch, with different names, in case that could fix possible memory allocation issues, but nothing changed.<\/p>\n","protected":false},"template":"","class_list":["post-370501","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["142"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["199"],"_bbp_topic_id":["370501"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","60427"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["370503"],"_bbp_last_active_id":["370503"],"_bbp_last_active_time":["2024-07-04 14:21:47"]},"test":"alex-chiellamail-polimi-it"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/370501","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\/370501\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=370501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}