This is a problem for an intermediate materials class. There is a RIGID beam (does not bend) that is pinned at the top and has a 220 lb force on the bottom. There are two cables holding it in place (See diagram below).
we are supposed to find the deflection of the beam at the bottom, and...
so you really think its an exact equation?
The reason i ask is that i was doing pipe flow simulations on flow lab for different Re's (different velocities, everything else the same).
the friction factor in the fully developed region was never quite equal to f=64/Re. the percentage of error...
hopefully this will be my last question...
My textbook says friction factor = 64/reynold's number for laminar flow.
But it doesn't say how this equation is derived. does anyone know where this equation comes from?
is it an approximation (i.e. will be more accurate for certain Re's and...
thanks for your replies.
i understand the part of the continuity equation that says
change in u / change in x =0 when fully developed. This makes sense because the velocity is now constant.
And i understand why u is slowing down initially (because of friction).
So according to the...
Let's say we have a horizontal pipe with steady, incompressible, two dimensional flow. There is friction at the top and bottom of the pipe which causes viscous effects.
The flow is fully developed. The velocity profile is parabolic.
Obviously there is an x-component (u) of velocity...
This is for a 300 level thermodynamics class. I am supposed to write a short paper comparing the 4 stroke engine to the otto cycle.
I thought these were the same thing though?
For my paper, i wrote what the 4 stroke are: intake, compression, power, exhaust...and described each one.
Then...
hmm good question. i was thinking of them as the same thing. But since you mentioned it, i think the prof. is asking about the velocity profile. Although wouldn't the boundary layer be the same thing when it first enters the pipe?
Thanks for your help so far.
The length of the pipe is the x-component. So i am assuming the y-component is the height of the pipe (if the pipe is laying horizontally). i was not given a picture or any additional info.
On flowlab, i assumed the fully developed region to be the point at...
Fluid Mechanics --continuity equation
This is for a 300 level fluid mechanics class.
"Consider the y-component of the velocity (v) at any cross-section in the entrance region. For simplicity, take the lower half of the pipe; the content of the flow field is going to be symmetric with respect...