What is the coefficient of discharge and why is it important?

AI Thread Summary
The coefficient of discharge is a dimensionless number that quantifies the efficiency of fluid flow through an orifice or nozzle. It is important because it helps in predicting the actual flow rate compared to the theoretical flow rate. The discussion highlights confusion regarding the use of the coefficient of discharge in relation to the variable z, which represents a height difference with a specific dimension. Additionally, there are concerns about the author's use of dimensions in their equations, indicating a lack of clarity. Understanding the coefficient of discharge is crucial for accurate fluid dynamics calculations.
werson tan
Messages
183
Reaction score
1

Homework Statement


why the author consider the coefficient of discharge as the z here ? what is exactly coefficient of discharge?

Homework Equations

The Attempt at a Solution

 

Attachments

  • 0081.PNG
    0081.PNG
    5.7 KB · Views: 429
  • 0082.PNG
    0082.PNG
    8.2 KB · Views: 450
Physics news on Phys.org
1. He doesn't . ##\Delta z ## happens to be 0.61 m here. You can check: it has a dimension. C has not. (*
)
2. Didn't google work ? Plenty links when I try !(*) the author is rather sloppy with dimensions. ##\rho_0## has a dimension too.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Does the discharge coefficient of an injector depend on the fluid?
Replies
2
Views
2K
Fluid discharge from pipe to atmosphere
Replies
2
Views
1K
Why Do Capacitors Behave Differently in Series and Parallel Configurations?
Replies
20
Views
2K
What Resistor Value Discharges a Capacitor 99% in 5 Seconds?
Replies
1
Views
2K
Deriving Discharge Expression for Broad Crested Weir Model
Replies
1
Views
1K
Principle of a positive corona discharge?
Replies
1
Views
2K
Finding R(t) in discharging RC circuit
Replies
4
Views
2K
Understanding Discharge: Where Does Capacitor Charge Go?
Replies
3
Views
1K
Charged capacitors connected in series
Replies
10
Views
3K
Test question: What is true for a mechanical impact?
Replies
7
Views
1K

Hot Threads

Recent Insights

Back
Top