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Vorticity equationThe vorticity equation is an important prognostic equation in the atmospheric sciences. Vorticity is a vector, therefore, there are three components. The equation of vorticity (three components in the canonical form) describes the total derivative (that is, the local change due to local change with time and advection) of vorticity, and thus can be stated in either relative or absolute form. The more compact version is that for absolute vorticity, component η, using the pressure system: Here, ρ is density, u, v, and ω are the components of wind velocity, and The terms on the RHS denote the positive or negative generation of absolute vorticity by divergence of air, twisting of the axis of rotation, and baroclinity, respectively. Additional recommended knowledge
Fluid dynamicsThe vorticity equation describes the evolution of the vorticity where, Equivalently in tensor notation, where, we have used the Einstein summation convention, and eijk is the Levi-Civita symbol. Physical Interpretation
Simplifications
Thus for an inviscid, barotropic fluid with conservative body forces, the vorticity equation simplifies to, [5] Alternately, in case of incompressible, inviscid fluid with conservative body forces, Notes
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Vorticity_equation". A list of authors is available in Wikipedia. |
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