Mechanics of Fluids

680 Appendix 4: Algebraic symbols
Table A4.1 (contd.)
Symbol Definition Dimensional
formula
c average clearance in journal bearing [L]
c velocity (celerity) of wave propagation [LT−1 ]
cf cp
local skin friction coefficient
specific heat capacity at constant
pressure
[1]
[L2T−2�−1 ]
cν specific heat capacity at constant
volume (i.e. at constant density)
[L2T−2�−1 ]
D drag force [MLT −2 ]
D diameter, especially of piston or rotor [L]
Di vortex or induced drag [MLT −2 d diameter, especially of pipe
]
[L]
E modulus of elasticity [ML−1T−2 ]
E energy of system [ML2T−2 ]
E specific energy in open channel,
h + u2 /2g
[L]
e internal energy divided by mass [L2T−2 ]
e eccentricity of journal bearing [L]
F a force [MLT −2 ]
F force divided by length in
two-dimensional flow
[MT −2 ]
Fr Froude number, u/(gl) 1/2 [1]
f friction factor [1]
g gravitational acceleration [LT −2 ]
H total head [L]
H upstream surface level above crest of [L]
notch or weir
Hm manometric head of pump [L]
h depth below free surface of liquid [L]
h head of liquid [L]
h clearance in bearing [L]
h depth of flow in open channel [L]
h specific enthalpy = e + p/ϱ [L2T−2 ]
hf hi hl i
head lost to friction
inertia head
head lost
energy gradient in open channel
[L]
[L]
[L]
[1]
K a constant
K bulk modulus of elasticity [ML−1T−2 ]
K ′ effective bulk modulus of fluid in elastic
pipe
[ML−1T−2 ]
Ks isentropic bulk modulus [ML−1T−2 ]
k a constant
k head loss coefficient [1]
k Kozeny function [1]
k radius of gyration [L]
k roughness size [L]
L length of journal bearing [L]
L lift force [MLT −2 ]
l a length [L]