Recent content by BobJonesX

So then, for the free-body diagram, how come we don't have to consider six planes ? the positive and negative z planes, the positive and negative y planes, and the positive and negative x planes ?

Ok. So considering the free body diagram, how come we don't consider all six faces? (i.e. are we considering a rectangular prism of water or is it more of a cylinder with shells? )

I was just wondering ( before I try to answer the rest of the questions), what causes the shear forces? (i.e. why are they there?)

Is the relationship the following : ? As for forces, is there a normal force ?

I I'm familiar with shear stress. I've just been introduced to viscocity. At the wall of the pipe, I'd imagine that the velocity would be almost zero. I would imagine that u(r) increases as it moves closer to the center of the pipe.

Unfortunately, I only have access to Fluid Mechanics (seventh edition) by Frank White. I looked up the Navier Stokes equations there and all I'm getting are a bunch of general-case partial derivative equations (e.g. du/dx + dv/dy = 0 ). I must not be getting it; can someone please either...

Ok, Thanks. So, do the Navier Stokes equations include this specific equation? Or am I supposed to derive the u(r) equation using the Stokes equations ? By the way, my textbook is Fluid Mechanics by Frank M. White, so if possible, could somebody tell me which chapter this type of problem is...

Homework Statement For low-speed(laminar) , steady flow through a circular pipe, the velocity u varies with radius and takes what form? Please see this link for picture of the pipe...