Effect of compressibility on the generation of hydrodynamic helicity in the Earth’s liquid core |
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| Authors: | M Yu Reshetnyak |
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| Institution: | 1.Schmidt Institute of Physics of the Earth,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | By the example of a standard three-dimensional model of thermal convection in a rotating spherical shell, it is shown how radial density gradient ?ρ affects the generation of hydrodynamic helicity χ. For example, the generation of χ weakly depends on ?ρ inside a Taylor cylinder and, outside the cylinder, the compressibility of the liquid amplifies the generation of χ. The consequences for the geodynamo theory are considered. |
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