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This video shows the CFD result of a heatsink which have two different air flow direction.
The air flow direction from the X negative direction created wake flow which decrease convective heat transfer rate compare to the other direction.
From the result shows increase at least 27% of cooling performance on the second scenario.
boundary conditions was airflow with V=7m/s at 20 degree C and heat source at the bottom of heatsink 10 W.
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