{"id":47338,"date":"2020-08-14T02:26:49","date_gmt":"2020-08-14T02:26:49","guid":{"rendered":"\/forum\/forums\/topic\/ansys-cfx-heat-exchanger-inlet-and-outlet-temperature-difference-is-zero\/"},"modified":"2020-08-14T02:26:49","modified_gmt":"2020-08-14T02:26:49","slug":"ansys-cfx-heat-exchanger-inlet-and-outlet-temperature-difference-is-zero","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-cfx-heat-exchanger-inlet-and-outlet-temperature-difference-is-zero\/","title":{"rendered":"Ansys CFX heat exchanger: inlet and outlet temperature difference is zero"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Greetings,&nbsp;&nbsp;I hope you guys are doing well.<\/p>\n<p>I am using Ansys cfx. I have modeled a coaxial pipe (inner pipe length 78 m , outer pipe length 80 m) used as a borehole heat exchanger (BHE) ,where the fluid (water) enters the inner pipe at 30 deg C and travels to the end of&nbsp;&nbsp;the inner pipe then circulates and exists the outer pipe leaving the heat exchanger at a cooler temperature. The pipes act as a heat exchanger because the fluid that is circulating looses its heat to the soil that surrounds the outer pipe. The solution isn&#039;t right because the temperature of outlet water is 30 deg C which means there wasn&rsquo;t any heat transferred due to conduction or convection. Your help will be extremely appreciated, thank you in advance.<\/p>\n<p>This is the geometry:<\/p>\n<p>1- Inner pipe<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/2G4NH5ZUAA5G\/f7dcfe13-825d-416d-9d50-3765b9a0a917.jpeg\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/2G4NH5ZUAA5G\/f7dcfe13-825d-416d-9d50-3765b9a0a917.jpeg\" alt=\"F7DCFE13-825D-416D-9D50-3765B9A0A917.jpeg\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-47338","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["19539"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":["]?rq"],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["943"],"_bbp_subscription":["254475"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["47338"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","180359"],"_bbp_voice_count":["3"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["124564"],"_bbp_last_active_id":["124564"],"_bbp_last_active_time":["2020-08-17 13:22:15"]},"test":"juju"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/47338","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\/47338\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=47338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}