Fluid Equations Flashcards
1
Q
What is SW?
A
γ = ρg
2
Q
What is SG?
A
SG = ρ/ρh20
3
Q
Ideal Gas law (density)
A
P = ρRT
4
Q
Speed of sound =
A
c = √ (kRT)
5
Q
dP/dz =
A
dP/dz = -γ ;
thus dP = -ρgdz
6
Q
dy/dz =
A
dy/dz = -ay / (g + az)
a = acceleration in xyz;
az often 0
7
Q
Ev =
A
-dP / (dV/V); dP / (dρ/ρ)
8
Q
Continuity equation is:
A
Q1 = Q2; Q = Av
9
Q
Hydrostatic force (FR) =
A
γ hr A = ρgh A
10
Q
What is yr and how to find it?
yr =
A
yr is the distance from surface to FR (along the line of action)
yr = (Ixc/ycA) + yc
11
Q
What is yc?
A
yc is the dist from surface to centroid of hatch along the line of action. Usually find with trig.
12
Q
FB (Archimedes) =
A
FB = γ V
13
Q
Bernoulli Equation:
A
P + 1/2ρV^2 + γz = const
14
Q
Equation for Total Head:
A
Bernoulli divided by gamma (ρg)
P/γ + (1/2g)V^2 + z
15
Q
Hydraulic Grad line =
A
HGL = Total head with velocity term removed.
= P/γ + z
