Practical analytical solutions for benchmarking of 2-D and 3-D geodynamic Stokes problems with variable viscosity

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Abstract

<p><strong>Abstract.</strong> Geodynamic modeling is often related with challenging computations involving solution of the Stokes and continuity equations under the condition of highly variable viscosity. Based on a new analytical approach we have developed particular analytical solutions for 2-D and 3-D incompressible Stokes flows with both linearly and exponentially variable viscosity. We demonstrate how these particular solutions can be converted into 2-D and 3-D test problems suitable for benchmarking numerical codes aimed at modeling various mantle convection and lithospheric dynamics problems. The Main advantage of this new generalized approach is that a large variety of benchmark solutions can be generated, including relatively complex cases with open model boundaries, non-vertical gravity and variable gradients of the viscosity and density fields, which are not parallel to the Cartesian axes. Examples of respective 2-D and 3-D MatLab codes are provided with this paper.</p>

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Popov, I. Y., Lobanov, I. S., Popov, S. I., Popov, A. I., & Gerya, T. V. (2014). Practical analytical solutions for benchmarking of 2-D and 3-D geodynamic Stokes problems with variable viscosity. Solid Earth, 5(1), 461–476. https://doi.org/10.5194/se-5-461-2014

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