{"id":31123,"date":"2018-10-26T05:39:24","date_gmt":"2018-10-26T05:39:24","guid":{"rendered":"\/forum\/forums\/topic\/htc-nu-and-f\/"},"modified":"2018-10-26T05:39:24","modified_gmt":"2018-10-26T05:39:24","slug":"htc-nu-and-f","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/htc-nu-and-f\/","title":{"rendered":"HTC Nu and f"},"content":{"rendered":"

Hello everyone,<\/p>\n

<\/p>\n

   I am trying to simulate 3D laminar developing flow and heat transfer in dimple enhanced pipe. The details are \"\"\"\"\"\"\"\"\"Different<\/p>\n

<\/p>\n

Mesh<\/span><\/p>\n

<\/p>\n

Tetrahedral mesh, 5 inflation layer on the wall<\/span><\/p>\n

<\/p>\n

Model:    Laminar<\/span><\/p>\n

<\/p>\n

Material:   Air<\/span><\/p>\n

<\/p>\n

 <\/span>Boundary conditions:<\/span><\/p>\n

<\/p>\n

Velocity inlet <\/span><\/p>\n

<\/p>\n

Pressure outlet<\/span><\/p>\n

<\/p>\n

Constant wall heat flux= 50w\/m^2<\/span><\/p>\n

<\/p>\n

Reference value: length 0.04m<\/span><\/p>\n

<\/p>\n

Residual: 10^-4 for all except energy 10^-6<\/span><\/p>\n

<\/p>\n

 <\/span>Results<\/span><\/p>\n

<\/p>\n

When I calculate Nusselt number in this way…<\/span><\/p>\n

<\/p>\n

Surface integral Area-weighted average wall fluxes Nusselt number & Skin friction factor, I feel these results are not in the right pattern…<\/span><\/p>\n

<\/p>\n

\"\"<\/span><\/p>\n

<\/p>\n

here the trend of results for both Nu and skin friction is in opposite order.<\/span><\/p>\n

<\/p>\n

 Please help me to calculate local and average Nusselt number and friction factor.<\/span><\/p>\n","protected":false},"template":"","class_list":["post-31123","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["3295"],"_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","0","0","0","0"],"_btv_view_count":["364"],"_bbp_subscription":["237535"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["31123"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","159823"],"_bbp_voice_count":["2"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["67666"],"_bbp_last_active_id":["67666"],"_bbp_last_active_time":["2018-10-26 10:59:51"]},"test":"jhjangmail-mcut-edu-tw-2"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/31123","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\/31123\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=31123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}