You are Here: Home >< Physics

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. A venturi meter is being calibrated horizontally and has a diameter of 75mm at the entrance and 50mm at the throat . The flow rate is obtained by measuring the time required to collect certain amount of water . The average number of measurement gives 0.614m^3 of water in 55.82 second . If the pressure gauge at the inlet reads 20kN/ (m^2) more than the throat , calculate the head loss due to friction using Bernoulli's equation

how to do this ??
2. I think that if the pressure drop measured exceeds the pressure drop calculated due to the Bernoulli effect, you can say that the extra pressure drop has been caused by friction.
3. (Original post by Smack)
I think that if the pressure drop measured exceeds the pressure drop calculated due to the Bernoulli effect, you can say that the extra pressure drop has been caused by friction.
Do you have any idea how to do this question??

Sent from my C6502 using Tapatalk
4. (Original post by wilson dang)
Do you have any idea how to do this question??

Sent from my C6502 using Tapatalk
As per my post, work out the pressure drop due to Bernoulli and if it is smaller than the measured pressure drop, then the extra pressure drop can be assumed to have been caused by friction.
5. (Original post by Smack)
As per my post, work out the pressure drop due to Bernoulli and if it is smaller than the measured pressure drop, then the extra pressure drop can be assumed to have been caused by friction.
How to work out pressure drop due to bernoulli??

Sent from my C6502 using Tapatalk
6. (Original post by wilson dang)
How to work out pressure drop due to bernoulli??

Sent from my C6502 using Tapatalk
How to know the measured pressure drop ?

Sent from my C6502 using Tapatalk
7. (Original post by wilson dang)
How to know the measured pressure drop ?

Sent from my C6502 using Tapatalk
It tells you in the question.
8. (Original post by Smack)
It tells you in the question.
Do you mean this????
9. (Original post by wilson dang)
Do you mean this????
Can you rotate it so I can read it?
10. (Original post by Smack)
Can you rotate it so I can read it?
Attached Images

11. (Original post by wilson dang)
That looks okay to me I think. I kinda forgot how to integrate head loss due to friction in the Bernoulli equation (been too many years since I've done this kind of stuff) so my method would have been more complicated actually.
12. anyone can comment on my answer ?

Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: May 19, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

How does exam reform affect you?

From GCSE to A level, it's all changing

Who would you like to thank?

Poll
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.