Case of Start-up of Steady Shear
For this case only two components of the shear stress became non-zero:
and
The equations above describe stresses gradually risen from zero the steady-state values. The equation is only applicable, when the velocity profile in the shear flow is fully developed. Then the shear rate is constant over the channel height. If the start-up form a zero velocity distribution has to be calculated, the full set of PDEs has to be solved.
Read more about this topic: Upper Convected Maxwell Model
Famous quotes containing the words case of, case and/or steady:
“If you think dope is for kicks and for thrills, you’re out of your mind. There are more kicks to be had in a good case of paralytic polio or by living in an iron lung. If you think you need stuff to play music or sing, you’re crazy. It can fix you so you can’t play nothing or sing nothing.”
—Billie Holiday (1915–1959)
“God ... created a number of possibilities in case some of his prototypes failed—that is the meaning of evolution.”
—Graham Greene (1904–1991)
“A steady patriot of the world alone,
The friend of every country but his own.”
—George Canning (1770–1827)