He proved the existence of the entropy solution by using the vanishing viscosity method.
We close this section with the following example, which shows how to enforce entropy stability a posteriori by carefully removing any viscosity production.
Viscosity of air and water are quite different as well, which requires different system dynamics.
Elevated blood viscosity in cyanotic patients was slightly reduced by the contrast.
In the viscous-convective range the viscosity plays a dominant role but the diffusion can be neglected.
If our proposed model for the differential rotation is correct then the effective viscosity at the outer core can be obtained from (3).
Towards the end, the viscosity is taken away and an external force is applied to get the particles moving again.
An alternative way of deriving a cutoff for (1.5) at high frequencies is to retain the effect of viscosity.
