Shear flow themselves. In a shearing flow, adjacent layers of fluid move parallel to each other with different speeds. Viscous fluids resist this shearing motion. For a Newtonian fluid, the stress exerted by the fluid in resistance to the shear is proportional to the strain rate or shear rate. A simple example of a shear flow is Couette flow, in which a fluid is trapped between two large parallel plates, and one plate is moved with some relative velocity to the other. Here, the strain rate is simply the relative velocity divided by the distance between the plates. Shear flows in fluids
The Resistance to Theory aesthetic approach to literary studies and those who uphold an historical approach both find theory inconvenient and challenging. They are the polemical opponents of theory. As theory is as much a linguistic construct as literature, it falls prey to the same problematics of literary language. De Man states that the resistance to theory may be "a built-in constituent of its discourse." The real debate of literary theory is henceforth "not with its polemical opponents but rather with its own methodological assumptions and possibilities." (p. 358) This is because "the resistance to theory is a resistance to the use of language