{"id":395084,"date":"2024-11-24T13:31:29","date_gmt":"2024-11-24T13:31:29","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/heat-transfer-in-a-battery-segment\/"},"modified":"2024-11-24T13:31:29","modified_gmt":"2024-11-24T13:31:29","slug":"heat-transfer-in-a-battery-segment","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/heat-transfer-in-a-battery-segment\/","title":{"rendered":"Heat Transfer in a Battery Segment"},"content":{"rendered":"<p>&lt;p&gt;Hi everyone,&lt;br&gt;&lt;br&gt;I&rsquo;m currently running a CFD simulation to analyze the heat transfer in a battery segment composed of lithium cells. Here are the key details of the setup:&lt;br&gt;&lt;br&gt;Model: k-epsilon turbulence model with energy equation enabled.&lt;br&gt;Heat source: On each cells, defined as a source term corresponding to the power dissipated in the cells, specified in W\/m&sup3; based on use cases.&lt;br&gt;Mesh: Focused on the positions of the cells, with a volume enclosure around the segment.&lt;br&gt;Boundary conditions:&lt;br&gt;Inlet: Velocity of 7 m\/s with an air temperature of 35&deg;C.&lt;br&gt;Outlet: Pressure outlet with air exiting at 35&deg;C.&lt;br&gt;The simulation runs fine overall, and the air temperature rises as expected while passing through the segment. However, I&rsquo;m observing an issue: the cells closest to the inlet are unexpectedly the hottest.&lt;br&gt;&lt;br&gt;I&rsquo;ve checked the inlet and outlet configurations, and they seem correct since the air is clearly heating as it moves through the segment. The mesh quality is good as well. I also have the radial and axial thermal conductivity values and the specific heat of the cells. &lt;br&gt;&lt;br&gt;Does anyone have an idea what could be causing this behavior? Could it be related to turbulence modeling, heat transfer mechanisms, or something I might have overlooked?&lt;br&gt;&lt;br&gt;Thanks in advance for your help!&lt;br&gt;&lt;br&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-395084","topic","type-topic","status-publish","hentry","topic-tag-battery-cooling","topic-tag-battery-pack-1","topic-tag-cfd","topic-tag-cooling","topic-tag-heat-transfer"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi everyone,I\u2019m currently running a CFD simulation to analyze the heat transfer in a battery segment composed of lithium cells. 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