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In the above development we have applied the thermodynamics of equilibrium ( referred to by some as thermostatics ) to the steady state.

This can be justified thermodynamically in this case, and this will be done in a separate paper which is being prepared.

This has an interesting analogy with the assumption stated by Philippoff that `` the deformational mechanics of elastic solids can be applied to flowing solutions ''.

There is one exception to the above statement as has been pointed out, and that is that fluids can relax by flowing into fields of lower rates of shear, so the statement should be modified by stating that the mechanics are similar.

If the mechanics are similar, we can also infer that the thermodynamics will also be similar.