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Negative Initial Temperature Condition

Hi I am simulating a tube and tube heat exchanger in OpenFoam and repeatedly getting error of Negative Initial Condition. Can someone please help how can I approach?

I have tried doing multiple things, applying limitTemperature in fvoptions,manipulating mesh, etc.

Can you suggest something?


OpenFOAM 02-05-23, 1:17 p.m. US1804

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