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vorticity SUST.

vorticity

دردورية

vorticity

دوامية

vorticity

اضطراب دوامي

vorticity

السير في حركة دورية

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That is, we demand that the world lines of the fluid particles form a timelike congruence having nonzero vorticity but vanishing expansion and shear. en.wikipedia.org

This produces convergence because of the way the air gains cyclonic vorticity while entering the base of the trough. en.wikipedia.org

More precisely, the vorticity of a flow is a pseudovector field, equal to the curl (rotational) of its velocity field. en.wikipedia.org

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