Calculating Hydrostatic Force on valve cavity in a Solenoid Valve

[jackmrrabbit]

TL;DR

By any chance, can someone help me understand how one would calculate force acting on the walls of the valve cavity? Is pressure usually assumed to be constant? Assuming the fluid is an incompressible fluid. Thank you.

 

[erobz]

The maximum static pressure it will have while flowing will be less than the static pressure at the inlet. While flow is passing from port A to port B the pressure will drop through the restriction near the "valve core bottom".

 

[Lnewqban]

Welcome!
Pressure in the valve cavity should change according to the degree of closing-opening of the valve.

 

[jackmrrabbit]

Welcome!
Pressure in the valve cavity should change according to the degree of closing-opening of the valve.

If the valve was set to the open position, pressure would still not be constant throughout the path from A to B due to area changes right?

 

[jackmrrabbit]

If the valve was set to the open position, pressure would still not be constant throughout the path from A to B due to area changes right?

Would force be constant?

 

[erobz]

If the valve was set to the open position, pressure would still not be constant throughout the path from A to B due to area changes right?

If there is flow when the valve is set to full open, then the pressure will not be constant throughout the path from A to B.

 

[Lnewqban]

Would force be constant?

The force on the walls will vary as static pressure varies along the path of the valve.
As the valve closes, and flow is reduced, the static pressure becomes more uniform along the path, but its value is lower.
For your calculation, maximum static pressure should happen at full open flow and closer to the inlet.