fluid dynamics question


by solo
Tags: dynamics, fluid
solo
solo is offline
#1
Feb10-04, 08:09 PM
P: 5
A straight horizontal pipe with a diameter of 1.0 cm and a length of 50 m carries oil with a coefficient of viscosity of 0.12 N s/m2. At the output of the pipe, the flow rate is 9.0 10-5 m3/s and the pressure is 1.0 atmosphere. Find the gauge pressure at the pipe input

I used the formula for flow rate: which is

Q = (pi)r^4(delta Pressure) / 8(coefficient of viscosity)(length)

I converted the diameter of 1.0 cm to .005 Meters radius, and the rest of the information is given

9.0 x 10^-5 = pi(6.25 x 10^-10)(Change in pressure) / 8(0.12)(50)

When i solve for pressure i get 21.7192 atm, and final pressure is 1,

so initial pressure is 1 + 21.7192 atm, which is 22.7192 ATM which is 2.30145 x 10^6 pascals

do you guys see anything wrong? thanks
Phys.Org News Partner Science news on Phys.org
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes

Register to reply

Related Discussions
Fluid Dynamics, Linearization Question Engineering, Comp Sci, & Technology Homework 0
Fluid Dynamics Question about streamlines...help!? Advanced Physics Homework 1
Question on Fluid Dynamics book Mechanical Engineering 2
Fluid Dynamics Question Introductory Physics Homework 0
Fluid Dynamics Question Engineering, Comp Sci, & Technology Homework 1