Viscous anisotropy of olivine

Monocrystal	Polycrystal

If grains are approximately orthotropic, the grain rheology can be modelled using the orthotropic power-law rheology. This requires specifying the grain eigenenhancements \(E_{ij}'\), the power-law exponent \(n'\), and the Taylor—Sachs weight \(\alpha\).

🚧 Not yet documented — see Rathmann et al. (2024) for details.