Register to reply 
Calculate the flow velocity 
Share this thread: 
#1
Jul713, 09:14 AM

P: 31

This might be simple but I can't remember how to do it.
problem: we have 2 tanks. One filled with atmospheric air at 1 bar and the other is vacuum. The two tanks are connected by a rigid pipe which has a valve. I open the valve and air flows to the vacuum tank. How do I calculate the air velocity? P.s: I don't think Bernoulli is valid here because the flow isn't steady I guess. Please state your assumptions clearly. Thanks in advance 


#2
Jul713, 09:37 AM

Sci Advisor
Thanks
P: 1,908

Flow velocity depends on the thickness and length of the pipe, and on the temperature of the air.



#3
Jul713, 11:23 PM

Emeritus
Sci Advisor
HW Helper
Thanks
PF Gold
P: 6,517

Instead of 'thickness' of the pipe, the term 'internal diameter' would be more apt.



Register to reply 
Related Discussions  
Convert an oscillating flow into a flow of constant velocity  Advanced Physics Homework  0  
Convert an oscillating flow into a flow of constant velocity  Engineering, Comp Sci, & Technology Homework  0  
Fluids, flow velocity and flow rate.  Introductory Physics Homework  2  
How to calculate flow velocity in bypass duct  Mechanical Engineering  0  
Flow rate relation? (velocity distribution in pipe flow)  Mechanical Engineering  1 