- #1
BobP
- 74
- 1
In fluid dynamics, the total energy of a fluid can be given as:
Pressure energy + gravitational potential energy + KE
or
P + ρgh + ½ρ(v^2)
But I have also seen the expression
P - ρgh + ½ρ(v^2)
NOTE the minus sign in the second equation.
Which is correct? Why are both equations used
Thank you
Pressure energy + gravitational potential energy + KE
or
P + ρgh + ½ρ(v^2)
But I have also seen the expression
P - ρgh + ½ρ(v^2)
NOTE the minus sign in the second equation.
Which is correct? Why are both equations used
Thank you