Calculate Suction Pressure from Walls & Cups

The pipe with .25m area wide has a cross-sectional area of 0.05m^2, while the pipe with .50m area wide has a cross-sectional area of 0.1m^2. Since the force is constant at 1N, the pressure applied to each pipe is equal to 1N/0.05m^2 = 20Pa for the smaller pipe and 1N/0.1m^2 = 10Pa for the larger pipe. In summary, the pressure applied to the smaller pipe is 20Pa and the pressure applied to the larger pipe is 10Pa.
  • #1
bchohertz
2
0
Hi, I had a question regarding pressure and suction.

Say you have 2 walls with a suction cup that is attached to each.
Initial volume of the cup is 1m^3, area attached is 1m^2
Initial pressure is 1 atm
Both walls have a hole of different sizes with a pipe leading out to atmosphere.
1 pipe is .25m area wide, other is .50m area wide.
How do I calculate how much suction pressure is being applied to each of these pipes?
assume the suction cups can infinantly exand out (think of an infinantly long piston), constant force of 1N pulling them out. Assume no friction, etc.

Thank you!

l
l
l------l
hole -----> l_____ ---> 1N
l l
l------l
l
l



l
l
l------l
HOLE -----> l_____ ---> 1N
-----> l
l------l
l
l
 
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  • #2
Pressure is force per unit area. First calculate the cross-sectional area of the pipes.
 

What is suction pressure and why is it important?

Suction pressure is a measure of the force exerted by a liquid or gas against a surface. It is important in applications such as fluid dynamics, engineering, and medicine because it can determine the stability and efficiency of a system.

How do you calculate suction pressure from walls?

To calculate suction pressure from walls, you need to know the surface area of the wall, the density of the fluid, and the velocity of the fluid. The formula for suction pressure is P = 0.5 * ρ * v^2, where P is the pressure, ρ is the density, and v is the velocity.

How do you calculate suction pressure from cups?

To calculate suction pressure from cups, you need to know the surface area of the cup, the atmospheric pressure, and the force applied to the cup. The formula for suction pressure is P = Patm - F/A, where P is the pressure, Patm is the atmospheric pressure, F is the force, and A is the surface area.

What are some factors that can affect suction pressure?

Some factors that can affect suction pressure include the surface area of the wall or cup, the properties of the fluid, the velocity of the fluid, and the atmospheric pressure. The shape and texture of the surface can also play a role in suction pressure.

How can suction pressure be used in real-world applications?

Suction pressure has many real-world applications, including in fluid dynamics, where it is used to calculate the lift and drag on objects. It is also important in medical procedures such as suctioning fluids during surgery. In engineering, suction pressure is used to design efficient systems for moving fluids.

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