> I was never clear on how a flat disk is supposed to couple
> to the working fluid, other than some nebulous explanation
> about a kind of surface tension effect between the disc
> surface and the working fluid molecules.
>
> Apparently the Tesla turbine efficiency is extremely poor
> when a work load is applied.
Not having gotten an answer I'm really happy with, I suppose it's time
to resort to trolling.
...
Do turbine engineers actually UNDERSTAND turbines, or do they just
optimize them with equations and software?