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Old   September 19, 2012, 23:54
Default Fluent error
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Dot product of flow direction and area normal is zero.
Check the specified flow direction on Mass Flow Inlet boundary
conditions for thread 8..this was the error i m getting when i m trying to simulate flow of the air in a room to find temperature and velocity profiles.i m new to this software and if its a amateur question..please bear with me
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Old   September 25, 2012, 11:48
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A dot product of zero between the face normal vector and the flow vector indicates that they are orthogonal. This way, no flow can enter the domain at this boundary.

Verify the direction vector of your boundary condition and make sure it has a component pointing towards the surface normal vector. I guess you just confused x and y components of the velocity vector.
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Old   September 29, 2012, 20:07
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thanks there
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Old   May 15, 2020, 16:53
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Quote:
Originally Posted by flotus1 View Post
A dot product of zero between the face normal vector and the flow vector indicates that they are orthogonal. This way, no flow can enter the domain at this boundary.

Verify the direction vector of your boundary condition and make sure it has a component pointing towards the surface normal vector. I guess you just confused x and y components of the velocity vector.
I have same cases like that. I've been already input for the direction. But the problem still show up
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