{"id":286932,"date":"2023-06-02T20:49:41","date_gmt":"2023-06-02T20:49:41","guid":{"rendered":"\/forum\/?post_type=topic&p=286932"},"modified":"2023-06-19T13:29:56","modified_gmt":"2023-06-19T13:29:56","slug":"some-suggestions-for-setting-up-thermal-constraints-for-oil-cooling-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/some-suggestions-for-setting-up-thermal-constraints-for-oil-cooling-simulation\/","title":{"rendered":"Some suggestions for setting up thermal constraints for oil cooling simulation"},"content":{"rendered":"

Hello everyone, I am doing a steady-state thermal simulation which involves a linear motor that drives grinding machine and the motor has a cooling pipe installed inside a coil slider (=heat source). <\/a><\/span><\/p>\n

The flow is laminar and heat transfer via forced convection occurs in internal flows of grinding oil. It is assumed that there is constant heat flux which is transferred to the grinding oil per unit area. From there I theoretically derived a linear equation describing the temperature profile across the fluid walls, which I use in Fluent. After that, I import the temperature result from Fluent into steady-state thermal<\/span><\/p>\n

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Figure below shows all thermal load and constraints that I have defined so far. The only load is in this case the internal heat generation from the coil slider. The last two constraints are applied on the fluid. <\/p>\n

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So my question is, have I already over-constrained or put too much redundant thermal constraints on the fluid? If yes, which one should choose? I was thinking about to suppress the heat flux option since the imported temperature profile has the heat flux quantity included based on the equation below, where T_m is the bulk fluid temperature and q_s is the constant heat flux.<\/span><\/p>\n

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Also if you looked in the model a solid cooling pipe is also included and it is also in contact with the grinding oil fluid. So should I extra define something like fluid-solid interface region in the steady-state thermal? Any explanations and suggestions are highly appreciated.<\/span><\/p>\n

Nikai<\/p>\n

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 <\/p>\n","protected":false},"template":"","class_list":["post-286932","topic","type-topic","status-closed","hentry","topic-tag-ansys-thermal-1","topic-tag-heat-flux","topic-tag-steady-state-thermal","topic-tag-thermal-analysis"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["23.217.200.71"],"_bbp_subscription":["284073"],"_btv_view_count":["621"],"_edit_lock":["1687181218:220423"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["286932"],"_bbp_forum_id":["27791"],"_bbp_engagement":["468","284073"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["287162"],"_bbp_last_active_id":["287162"],"_bbp_last_active_time":["2023-06-05 14:14:44"]},"test":"jia_tian-tanstudent-reutlingen-university-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/286932","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\/286932\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=286932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}