Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

I have a system. You can assume it is just a 1" diameter steel pneumatic cylinder (1 foot long). Assume we ignore the bore size issue at this point. One chamber is filled up by oil (6" of volume), this chamber also has a hole to let the oil to go to atmosphere. The other half is connected to a 'x' psi gas pressure source (let x = 20 at this time).

My question is how to calculate the amount of time does the system take for all oil to get out from the cylinder?

Please give me some direction

Thanks

share|improve this question
    
Look for "flow through orifice" for the equations. –  ja72 Mar 27 '13 at 20:06
    
Related link: efunda.com/formulae/fluids/draining_tank.cfm –  ja72 Mar 27 '13 at 20:08

1 Answer 1

Assuming the system is horizontal, write the Bernouilly equation between the piston and the bore hole. From it you get V. Then write the equation for the volume remaining inside: Vol(t)=Vol(0)-V*s*t Where s is the surface of the bore.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.