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Negative value of Velocity?

Question asked by Legt Chevrollier on Dec 28, 2011
Latest reply on Mar 5, 2012 by Legt Chevrollier

I am getting a negative value of Velocity in my Flow Simulation analysis. It is not much, something like - 0.5 m/s

This made me puzzled: How can a velocity of a wind have a negative value???

 

I know that pressure can have a negative and positive value. Positive value of wind will act like a compressional force towards the object. And negative value of pressure will act like a suction force.

 

But velocity can only take positive value. How can a velocity take a negative value?

 

Did I just miss some of the physics classes, or is this just Flow Simulation error?

 

Thank you for the replies.

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