• Support PF! Buy your school textbooks, materials and every day products Here!

Flow Rate Problem (Help!)

  • Thread starter rawimpact
  • Start date
  • #1
14
0
1. A large tank isopen to the atmosphere and is filled with water. A small hole is 16m below the surface of the water. If the flow rate of the water is out of the hole is 2.5e^3 m^3/min, calculate: a)the velocity of the water as it leaves the hole and b) the diameter of the hole.



2. Lets say the pool is 1 and the hole is 2, P = pressure and P is density, i was given the equation: P1 + Pv1^2 + 1/2PY1 = P2 + 1/2PV2^2 + PY2


3. I have no clue how to solve this equation, can someone help me out please?
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
5
Check the relevant formula given in 2.
Inside the pool velocity is zero. And outside the pool Y2 is zero.
 
  • #3
14
0
Check the relevant formula given in 2.
Inside the pool velocity is zero. And outside the pool Y2 is zero.
So the equation is:

P1 + 1/2PY1 = P2 + 1/2PV2^2

Correct?

Where do i go from here?
 
  • #4
rl.bhat
Homework Helper
4,433
5
Again check the left hand side of the equation.
 
  • #5
14
0
Can you please explain the equation, i do not understand it so i really do not know what the velocities are
 
  • #6
rl.bhat
Homework Helper
4,433
5
OK. At the opening what is the total pressure inside the tank?
 
  • #7
14
0
OK. At the opening what is the total pressure inside the tank?
Well since it is exposed to the atmosphere, isnt it atmospheric pressure? 1.01x10^5 Pa?
 
  • #8
rl.bhat
Homework Helper
4,433
5
Well since it is exposed to the atmosphere, isnt it atmospheric pressure? 1.01x10^5 Pa?
Plus the pressure due to the water at the depth Y1
 
  • #9
14
0
Ok, i've figured it out, thank you for all of your help. I have another problem, should i continue that here or start another thread?
 
  • #10
rl.bhat
Homework Helper
4,433
5
You can continue here.
 

Related Threads for: Flow Rate Problem (Help!)

Replies
1
Views
2K
Replies
17
Views
1K
  • Last Post
Replies
14
Views
3K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
4
Views
947
  • Last Post
Replies
2
Views
2K
Replies
0
Views
3K
Top