Twisting Term
Twisting Term : Also called: tilting term, tipping term: The term in the vorticity equation which represents the generation of vertical vorticity by the twisting of horizontal vorticity into the vertical through the agency of shear in the vertical velocity. In symbols this term is: du dw dv dw dz dy dz dx j where u, v, w ait the velocity components along the coordinate directions x, y, z, respectively. N.B. Refer to source to verify equation(s)