laminar flow of a viscous fluid between two infinetely long and wide flat plates?

Answer 1

I don't know who gave a thumbs down to the first answer, but whoever it was ... you're an idiot.

Couette flow is laminar viscous flow between two flat plates, one of which is moving relative to the other.

If the walls are stationary, the flow must be driven by a pressure gradient. This type of flow is known as Poiseuille flow.

These are special cases which allow for some simplifications of the Navier-Stokes equations, but if I tell you what those are, you won't learn anything. Crack open your fluids textbook and read for yourself.

Answer 2

Laminar flow simply means smooth, or lacking turbulence. If the the fluid is viscous (thick), then it has a lot of internal friction.The plates would have to be relatively far apart in order to prevent the boundary layer of fluid (which does not move, since it sticks to the plate) from creating turbulence in the middle layer, which will want to cling to the adjacent layers of fluid.

What is the question?

Answer 3

Couette flow.
if there is pressure difference, Poiseulli's flow.