{"id":440918,"date":"2025-09-06T12:33:43","date_gmt":"2025-09-06T12:33:43","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/guidance-needed-for-conjugate-heat-transfer-analysis-for-a-3s3p-li-ion-battery\/"},"modified":"2025-09-06T12:33:43","modified_gmt":"2025-09-06T12:33:43","slug":"guidance-needed-for-conjugate-heat-transfer-analysis-for-a-3s3p-li-ion-battery","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/guidance-needed-for-conjugate-heat-transfer-analysis-for-a-3s3p-li-ion-battery\/","title":{"rendered":"Guidance needed for Conjugate Heat Transfer Analysis for a 3s3p Li-ion Battery"},"content":{"rendered":"

<p>\"\"\"\"<\/p><p>I am performing a conjugate heat transfer (CHT) analysis of a 3s3p battery pack to evaluate the effect of copper plates on thermal management. As a baseline for comparison, I am first analyzing the pack without copper plates.<\/p><p>For validation, I am using data from a research paper that experimentally analyzed a 3s3p pack under a 3C discharge rate. The paper reports a volumetric heat generation of 170,000 W\/m³<\/strong> within the cells, which I have applied as a cell zone heat source in my simulation. At the cell walls, I specified a convective heat transfer coefficient of 5 W\/m²K<\/strong> (taken from youtube). The goal is to compare the simulated maximum cell surface temperature with the experimental results to validate the model.<\/p><p>The mesh is done in fluent with 6 layers of inflation.<\/p><p>\"\"\"\"<\/p><p>The simulation setup is transient, run for 700 s<\/strong> with a timestep of 1 s<\/strong>, using the k–ε turbulence model<\/strong>. Inlet and outlet boundary conditions are left at default settings, and all walls are coupled by default.<\/p><p>The issue I am facing is that the cell surface temperature continuously increases linearly with time<\/strong> (as shown below) and does not reach a steady value, even after many timesteps. I tested lower heat generation values –17,000 W\/m³<\/strong>(100k lower<\/strong>) and obtained the same trend: the temperature rise was still linear, just at a slower rate. <\/p><p>\"\"<\/p><p>\"\"<\/p><p>Despite multiple trials, the temperature evolution always shows this linear rise, and I am unable to stabilize or match it with the experimental results. I need guidance on resolving this issue.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-440918","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["440918"],"_bbp_subscription":["501041","62293"],"_bbp_author_ip":["2402:e280:3e28:53b:2e57:628d:a869:c2ff"],"_bbp_last_reply_id":["441040"],"_bbp_last_active_id":["441040"],"_bbp_last_active_time":["2025-09-09 08:44:29"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["501041","62293"],"_btv_view_count":["10116"],"_bbp_topic_status":["unanswered"],"_bbp_likes_count":["1"]},"test":"zulfikar-jasdanwala23vit-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/440918","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\/440918\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=440918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}