Frictional Effects in Strongly Divergent Flows

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  • 1 National Center for Atmospheric Research, Boulder, CO 80307
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Abstract

The effect of friction in strongly divergent steady flows is studied. It is found that friction weakens flow divergence out of strong high-pressure centers, contrary to the more commonly studied case for weaker high-pressure centers in rotating flows, for which friction produces divergence. The stability of the solution is discussed for the general case on a linear basis. Nonlinear analytic solutions are presented for the case of no deformation in the flow. The conclusions are quantified in a drag, deformation and Laplacian of geopotential parameter space.

Abstract

The effect of friction in strongly divergent steady flows is studied. It is found that friction weakens flow divergence out of strong high-pressure centers, contrary to the more commonly studied case for weaker high-pressure centers in rotating flows, for which friction produces divergence. The stability of the solution is discussed for the general case on a linear basis. Nonlinear analytic solutions are presented for the case of no deformation in the flow. The conclusions are quantified in a drag, deformation and Laplacian of geopotential parameter space.

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