{"id":40443,"date":"2020-01-28T01:09:48","date_gmt":"2020-01-28T01:09:48","guid":{"rendered":"\/forum\/forums\/topic\/facing-issue-with-defining-turbulence-intensity-as-expression\/"},"modified":"2020-01-28T01:09:48","modified_gmt":"2020-01-28T01:09:48","slug":"facing-issue-with-defining-turbulence-intensity-as-expression","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/facing-issue-with-defining-turbulence-intensity-as-expression\/","title":{"rendered":"Facing issue with defining turbulence intensity as expression"},"content":{"rendered":"<p>Hi, I am working on a simulating the flow around a gable roof building and am trying to incorporate ABL profiles using named expressions for inlet velocity and inlet turbulence intensity. The expressions for the profiles were obtained by curve fitting. The expression for velocity is&nbsp;(-97.6[m\/s]*((y\/0.25[m])**-0.0159))+108.3[m\/s] and the expressions for turbulence intensity is&nbsp;5.171*((y\/0.25[m])**-0.4446)+12.56. I have noticed that unless turbulence intensity is defined as a constant value, the resulting turbulence intensity after simulation comes out to be 7e-7 at the inlet (shown in the attached screenshot). When turbulence intensity is defined as a constant value through expressions, the resulting turbulence intensity is scaled by a factor of 100. I&#8217;m not sure if my use of &#8216;y&#8217; here is the issue. Both my profiles vary with height and y is my vertical coordinate. However, my velocity profile is correct and have no issues with it.&nbsp;<\/p>\n<p><\/p>\n","protected":false},"template":"","class_list":["post-40443","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["12623"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1357"],"_bbp_subscription":["246906"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["40443"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","172619"],"_bbp_voice_count":["2"],"_bbp_reply_count":["12"],"_bbp_last_reply_id":["105385"],"_bbp_last_active_id":["105385"],"_bbp_last_active_time":["2020-02-14 15:54:16"]},"test":"vkb12"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/40443","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\/40443\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=40443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}