ANIMA: Anisotropic viscosity in mantle dynamics

Implement anisotropic viscosity (AV) calculations into a geodynamic code ASPECT, to understand its role in a variety of geodynamic processes.

AV depends on the deformation history of the rocks, and hence we have to track the strain history on the particles, calculate the texture obtained due to this strain history, and then calculate its effect on the viscosity. Computationally it is challenging, because to have reliable texture we need to have min 500 grains on each particle, and we need at least a few particles/cells to get a good average viscosity field. Since some order of magnitude variations in viscosity is expected within the model domains (at least for some problems), we utilize an adaptive mesh refinement.