8/31/2023 0 Comments Eddy viscosity ratio external flow![]() The improved derivation of the solar-wind driver function for the turbulence effect fails to yield higher correlation coefficients between measurements of the solar-wind driver and measurements of the response of the Earth's magnetosphere. For the freestream turbulence effect in solar-wind magnetosphere coupling, the eddy-viscous force of the solar wind on the Earth's magnetosphere is rederived accounting for the action of turbulent eddies smaller than the correlation length, along with other corrections. Thus, our concept of MHD eddy viscosity fails testing. For internal flows and flows where the origin of the. Typical examples are external aerodynamics, like flow around cars, aircrafts and submarines. The eddy viscosity ratio is especially convenient to use in low-turbulence cases where it is difficult to guess any characteristic turbulent length scale. = 100-h age of the solar-wind plasma at 1 AU, it is found that the slip zones are much narrower than eddy-viscosity theory says they should be. The main advantage with using the eddy viscosity ratio is that this directly says something about how strong the influence of the turbulent viscosity is compared to the molecular viscosity.
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