Preesure changes in fliud movement

  • Thread starter Thread starter superb
  • Start date Start date
  • Tags Tags
    Movement
AI Thread Summary
The discussion revolves around calculating the pressure changes and lifting forces caused by fluid movement in a grooved surface that rotates over a stationary smooth surface. The user seeks clarification on whether the Bernoulli equation can be applied to this scenario, as they understand that high-speed fluid flow results in low pressure. Participants express uncertainty, with one suggesting that surface tension of the lubricant might play a role. The conversation highlights the need for expert insight to accurately address the complexities of fluid dynamics in this context. Understanding these principles is crucial for solving the user's problem effectively.
superb
Messages
2
Reaction score
0
Hope you guys can help me in solving this problem...

There one grooved surface seal the another smooth surface from bottom ...
inside the grooved surface there will be a liquid... this grooved surface will rotate at certain speed , while the smooth surface on the bottom will remain stationary.

The problem is the pressure changes result from the movement of the fluid inside the grooves will lift the grooved surface... how to calculate this pressure different and lifting force ?


p/s what i know, the high speed fluid will result the low pressure... how come there lifting force?
 
Physics news on Phys.org
Welcome to PF, Superb.
I'm having a bit of trouble understanding your question. Do you mean that you have a stationary seal with oiled grooves in the interior surface within which the shaft rotates?
 
yes, that's what i mean


could you help me... can i use the Bernoulli equation for this application?
 
I'm afraid that I can't help you, pal. I never finished high-school. My first thought is that it would be a surface-tension effect of the lubricant. You really have to wait for a real scientist to answer you, though.
 

Thread 'Need help understanding particle physics and quantum physics'

So I know that electrons are fundamental, there's no 'material' that makes them up, it's like talking about a colour itself rather than a car or a flower. Now protons and neutrons and quarks and whatever other stuff is there fundamentally, I want someone to kind of teach me these, I have a lot of questions that books might not give the answer in the way I understand. Thanks
View full post »

Similar threads

B Can Unlimited Energy Launch Objects into Orbit Using Accelerator Technology?
Replies
32
Views
5K
B Density of air experiment, why it yields these answers?
Replies
20
Views
3K
B Why do sails on a boat generate lift perpendicular to the sails?
Replies
9
Views
913
Kleppner:Mechanisc: 7.33 Grooved cone and mass
Replies
12
Views
2K
Particle inside a smooth groove performing circular motion
Replies
17
Views
3K
Calculating Force to Push Steel Rod Up 50 cm
Replies
24
Views
3K
B If the source of the pressure distribution around a lifting airfoil is known, why is not explained in textbooks?
Replies
23
Views
1K
Automotive Friction force, Coefficient of friction &Traction
Replies
5
Views
4K
"Air Pressure" is not "the weight of the air above you"
Replies
27
Views
4K
Effect of temperature on surface tension
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top