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Would printing the mount in PETG have any impact on it melting over time?
So, if you understand fluid dynamics so well, why aren't computers outfitted with centrifugal fans? Or, why for that matter, aren't all small appliances outfitted with centrifugal fans? I mean, it's not like they're more expensive to produce.
The fan in the Ender 3 V2 PSU has a label that reads 12V. Check for labels on the fan before you go poking live wires.
2:3 Scale VT100 Terminal Reproduction
Continue a Failed 3d Print
Ender 3 - Silent Fan Replacement Guide