1. Theoretical calculations for liquid iron at the physical conditions of Earth's core predict a viscosity of μ = 10 –2 Pa s [
2. de Wijs G. A., et al., Nature 392, 805 (1998);
3. ]. The kinematic viscosity ν = μ/ρ of iron where ρ is the fluid density is comparable to the value for water.
4. Fluid velocities at the top of the core are inferred from time variations in the magnetic field. A review of the theory and observations is given by J. Bloxham and A. Jackson [ Rev. Geophys. 29 97 (1991)].
5. Glatzmaier G. A., Roberts P. H., Phys. Earth Planet. Inter. 91, 63 (1995).