"Greg Neill" wrote in news:46386dd3$0$30274
:

"John Schutkeker" wrote in message
. 102...

Has the theory of viscous heating of an ordinary fluid been developed?

What's "an ordinary fluid"? What's not?

The stuff we're familiar with in ordinary life, with no extreme states of
condensed matter or plasmas. I guess I should have said "incompressible
liquid."

Joule measured the mechanical equivalent of heat using
frictional heating in a fluid in about 1845.

Theory, not measurement.