A

Thermal diffusivity

m ²/sec

A

Surface

m ²

B

Resolution

M

B

Width

M

B

Magnetic flux density

Tesla

C

Solute concentration

kg/m ³

c*

Exhaust velocity

m/s

c _p

Specific heat at constant pressure

J/kg-K

c _ph

Phase velocity

m/s

c _s

Speed of sound

m/s

c _v

Specific heat at constant volume

J/kg-K

C _valve

Valve capacity

m ²

C

Capacitance

F

C _D

Drag coefficient

-

C _F

Thrust coefficient

-

C _L

Lift coefficient

-

C _P

Pyroelectric coefficient

A.sec/K-m ²

D

Piezoelectric coefficient

N/C

d, D

Diameter

m

D

Diffusion coefficient

m ²/sec

D _h

Hydraulic diameter

M

e

Internal energy

J/kg

e

Spacing between pixels

m

E

Young's modulus

Pa

E _el

Electric field strength

V/m

E'

Energy density

J/m ³

Ec

Eckert number

-

f

Frequency

Hz

f

Friction factor

-

F

Force

N

g

Acceleration of gravity

m ²/sec

G _eff

Effective thermal conductance

W/K

h

Height, pump head

m

h

Heat transfer coefficient

-

I

Current

A

I _sp

Specific impulse

sec

I

Moment of inertia

m ⁴

k

Specific heat ratio

-

k

Spring constant

N/m

K _T

Mass transfer coefficient

m/sec

K

Boltzmann's constant

J/K

Kn

Knudsen number

-

l

Characteristic length

m

L

Length

m

L _e

Entrance length

m

L _valve

Leakage ratio

-

Latent heat

KJ/kmol

m

Magnetic moment

-

m

Mass

kg

m _gear

Gear module

Mass flow rate

kg/sec

M _m

Magnetization

A/m

M

Molecular weight