Tangential velocity - Theoretical and the one used in different CFD softwares
Different velocity components in cylindrical coordinate are
(1) Radial velocity - u
(2) Tangential velocity - v
(3) Axial velocity - w
But the way tangential velocity defined in softwares like star-CCM+ is as follows
Tangential velocity = square root (u square + v square)
or, = sqrt(u2+v2).
Which one is the correct interpretation?
(2) should be the azimuthal velocity ...
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