Register to reply

Velocity in a pipe

by fowler2k
Tags: pipe, velocity
Share this thread:
fowler2k
#1
Aug27-14, 02:51 PM
P: 6
I need to find the velocity within a pipe , I know the flow rate and diameter

Flow rate =0.01
Diameter =90mm

Am I correct in thinking to use V =Q/A

Where A is found using A=pi/4 x D^2

Using this I got A =0.0064m but somehow this does not seem quite right to me

Can anybody please tell me where I am going wrong please

Thanks
Phys.Org News Partner Engineering news on Phys.org
A spray-on light show on four wheels: Darkside Scientific
Research project on accident-avoiding vehicle concluded
Smaller artificial magnetic conductors allow for more compact antenna hardware
SteamKing
#2
Aug27-14, 03:08 PM
Emeritus
Sci Advisor
HW Helper
Thanks
PF Gold
P: 6,727
Please include units for all quantities. How else can we tell what these numbers mean?
fowler2k
#3
Aug27-14, 03:27 PM
P: 6
0.01m3 s-1

billy_joule
#4
Aug27-14, 08:14 PM
P: 88
Velocity in a pipe

Quote Quote by fowler2k View Post
I need to find the velocity within a pipe , I know the flow rate and diameter

Flow rate =0.01
Diameter =90mm

Am I correct in thinking to use V =Q/A

Where A is found using A=pi/4 x D^2

Using this I got A =0.0064m but somehow this does not seem quite right to me
Yes, it's not quite right. Your answer is a length...you want an area.
fowler2k
#5
Aug27-14, 08:38 PM
P: 6
Ah so it should be m^2 ?
JazzyJones
#6
Sep1-14, 12:04 AM
P: 20
What are the units for your flow rate?

And also, Your equation for area includes the term D^2 which implies the diameter is being squared, so your answer for area should have the units mm^2.


Register to reply

Related Discussions
Mean velocity for turbulent velocity distribution in pipe. Introductory Physics Homework 17
Pipe cutter is fixed on a pipe, with 3 forces acting on the pipe. Introductory Physics Homework 8
Why is the average velocity in a circular pipe equal to half the maximum velocity? Mechanical Engineering 4
Estimate the velocity and angular velocity of an empty pipe Mechanical Engineering 1
Pipe Velocity Introductory Physics Homework 3