Abstract
This paper considers a family of non-diffusive active scalar equations where a viscosity type parameter enters the equations via the constitutive law that relates the drift velocity with the scalar field. The resulting operator is smooth when the viscosity is present but singular when the viscosity is zero. We obtain Gevrey-class local well-posedness results and convergence of solutions as the viscosity vanishes. We apply our results to two examples that are derived from physical systems: firstly a model for magnetostrophic turbulence in the Earth’s fluid core and secondly flow in a porous media with an “effective viscosity”.
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20 July 2021
A Correction to this paper has been published: https://doi.org/10.1007/s00021-021-00609-8
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For simplicity, we sometime write and .
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Acknowledgements
S. Friedlander is supported by NSF DMS-1613135 and A. Suen is supported by Hong Kong Early Career Scheme (ECS) Grant Project Number 28300016.
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Friedlander, S., Suen, A. Wellposedness and Convergence of Solutions to a Class of Forced Non-diffusive Equations with Applications. J. Math. Fluid Mech. 21, 50 (2019). https://doi.org/10.1007/s00021-019-0454-1
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DOI: https://doi.org/10.1007/s00021-019-0454-1