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Dot product of flow direction and area normal is zero

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Old   February 28, 2023, 10:29
Angry Dot product of flow direction and area normal is zero
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Solaleh
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I have received an error in start fluent;
"Dot product of flow direction and area normal is zero, check the specified flow direction on mass Flow inlet boundary "
How can i fix this?!
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Old   February 28, 2023, 23:25
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Go to boundary conditions and edit the conditions for your surface. The specified flow direction vector is perpendicular to the boundary's normal vector. Give it the correct vector.
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