Module 3B Flashcards
(15 cards)
it is used to increase mechanical energy of flowing fluid
Pump
for steady state, it is the work done by the fluid
boundary work
x-directed force caused by gravity acting on the mass M in a controlled volume
body forces (Fxg)
when fluid flows, there will be an x-directed shear of friction forces is present
friction forces (Fxs)
a low value of reynold’s number means that _________ are large in comparison with ______________
viscous forces; inertial forces
x-directed force caused by gravity acting on the mass M in a controlled volume
solid surface force
represented by Wp
pump
x-directed forces caused by pressure forces acting on the surface of the fluid system
pressure forces (Fxp)
what is alpha?
kinetic energy velocity correction
energy converted to work is lost in?
Mechanical Energy
bernoulli’s equation for steady frictionless flow states that, along a streamline:
total mechanical energy is constant
what are the assumptions in bernoulli’s equation?
- inviscid flow (no shear stress)
- constant density
- steady flow
- along a streamline
- applied in an inertial reference frame
resultant forces
Rx
what are the uses of the increase in ME due to pump?
- maintain the flow
- provide KE
- offset frictional losses
- increase PE
it is the sum of all frictional losses
frictional losses
