Dy dz

The vector w is thus one-half of the vorticity vector:The vector w is thus one-half of the vorticity vector:

To avoid the factor 2 we define the vorticity Z as equal to twice the rotational vector w, then:

i

J

k

dx

dy

dz

vx

vy

Referring back to simple flow configuration of figure 2.13 we note that = vz =0 and vx = v0y , then we have:

0 0

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