TABLE OF CONTENTS | a | Acceleration, m/s 2 | |
| a | Specific surface area, m 2/m 3 packing | |
| A | Area, m 2 | |
| A c | Cross-sectional area, m 2 | |
| B | Magnetic field, N/A m = T | |
| c | Particle speed, m/s | |
| c | Velocity of sound, m/s | |
| C | Capacitance, C/V | |
| C | Concentration, mol/m 3 | |
| C D | Drag coefficient, dimensionless | |
| C p | Specific heat at constant pressure, J/mol K or J/kg K | |
| C v | Specific heat at constant volume, J/mol K or J/kg K | |
| d | Diameter, m | |
| d | Distance, m | |
| D | Diffusivity, m 2/s | |
| D | Dilution rate, 1/s | |
| D | Rate of evaporation, mol/s | |
| D AB | Distance (surveying), m | |
| e | Charge of an electron | |
| E | Catalyst pellet effectiveness factor, dimensionless | |
| E | Extruder uniformity index, dimensionless | |
| E | Heat exchanger fin efficiency, dimensionless | |
| E | Residence time distribution, 1/s | |
| E | Young's modulus, Pa | |
| E | Electrical field, N/C | |
| E A | Activation energy, J/mol | |
| E K | Kinetic energy, J/kg or J/mol | |
| E p | Potential energy, J/kg or J/mol | |
| f | Friction factor, dimensionless | |
| f | Self-purification rate k L,a/k r, dimensionless | |
| F | Force, N | |
| F | Mass flow rate, kg/s | |
| F D | Drag force, N | |
| Fr | Froude number, v 2/l g, dimensionless | |
| g | Gravitational acceleration, 9.81 m/s 2 | |
| G | Mass velocity, F/A, kg/m 2s | |
| G | Universal gravitational constant, 6.6720 10 -11 N m |
