Recent content by dor040101

I'm not sure because everyone makes different assumptions in fluid mechanics in this level... this is a question from an exam, the professor didn't neglect gravity. The NS equation is: ##0=- \frac{dP}{dz} + \mu \frac{d^2u}{d^2y} -\rho g## where ##u## is the velocity at ##z## direction. For the...

There is a cylinder which is held by a rope, inside a pipe. Fluid is flowing (laminar) in the direction of Q. I'm trying to calculate the velocity profile in the gaps between the pipe and cylinder, using Navier Stokes. First question is, if ##\frac{R_1-R}{R_1}<<1##, which means the gap width is...