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Abnormally high temperature while modelling radiant cooling panel

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Old   May 18, 2023, 04:28
Default Abnormally high temperature while modelling radiant cooling panel
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Hello, I am trying to model a radiant cooling panel but the temperature of the aluminum panel is abnormally high (the heat flux is only 92 W/m2 but the temperature reaches 5000+ K). When I modelled it without the panel (only the pipe, split in half; bottom and top, the heat flux applied to the bottom part) there seem to be no mistake, and this only happens when I use the panel. Any mistake I might have overlooked? The boundary conditions and supporting images are attached in the link below. Many thanks in advance!
https://imgur.com/a/OBbrS7Y
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