Calculate Pressure Applied on Fluid by Piston Cylinder Arrangement

  • Thread starter Thread starter dE_logics
  • Start date Start date
  • Tags Tags
    Fluid Pressure
AI Thread Summary
The discussion centers on the pressure exerted by a piston cylinder arrangement on a fluid, questioning whether the pressure equals the applied force per unit area. It confirms that, under quasistatic conditions, the pressure at the fluid's surface is equal to the applied pressure. However, at greater depths, the pressure increases due to the weight of the fluid, necessitating the inclusion of the ρgh term. The conversation also touches on the principles of hydraulics and Pascal's principle, affirming the relationship between force and pressure in this context. Overall, the consensus is that the pressure at the fluid's surface equals the applied pressure, with additional considerations for depth.
dE_logics
Messages
742
Reaction score
0
In this attached image, a force is applied through a piston cylinder arrangement of cross section 1 cm...this force is uniformly distributed throughout the 1cm wide piston...so there's a certain pressure (x) that it poses on the fluid.

Will the fluid pressure under action of this force be = x?

Though it obviously should be, but I see some major advantages of this arrangement, that's why I'm asking.
 

Attachments

  • Untitled 1.jpg
    Untitled 1.jpg
    5.9 KB · Views: 404
Physics news on Phys.org
It will, if it's a quasistatic process.
 
dE_logics said:
Will the fluid pressure under action of this force be = x?
At the top of the fluid, yes. At depths below the surface, you'll need to add a ρgh term due to the weight of the fluid.
 
defunc said:
It will, if it's a quasistatic process.

It's not a process, it's a state.
 
Doc Al said:
At the top of the fluid, yes. At depths below the surface, you'll need to add a ρgh term due to the weight of the fluid.

Assume no gravity situation.

Verdict:Yes it's true.
 
Yes, this is essentially how hydraulics work.
 
dE_logics said:
Verdict:Yes it's true.
Yes, this is Pascal's principle.
 
Ok, thanks a lot everyone!
 
Back
Top