Fluid Mechanics - Imperial and SI Units Dimensions
Imperial (USCS) and SI dimensions and units terminology in fluid mechanics.
Fluid mechanics in the
- Imperial or USCS - United States Customary Units
- International System of Units - SI system
Terminology | Dimensions | Imperial Units (USCS) | SI-units |
---|---|---|---|
Acceleration due to gravity | L / T2 | ft/s2 | m/s2 |
Area | L2 | ft2 | m2 |
Chezy roughness coefficient | L1/2 / T | ft1/2/s | m1/2/s |
Critical Depth | L | ft | m |
Density | F T2 / L4 | lb s2/ ft4 |
N s2/m4 |
Depth | L | ft | m |
Depth in open channel | L | ft | m |
Diameter | L | ft | m |
Distance from solid boundary | L | ft | m |
Flow rate | L3 / T | ft3/s | m3/s |
Force | F | lb | N |
Force due to pressure | F | lb | N |
Hazen Williams roughness coefficient | L0.37 / T | ft0.37/s | m0.37/s |
Head loss due to friction | L | ft | m |
Head of height | L | ft | m |
Head of weir | L | ft | m |
Height above datum | L | ft | m |
Hydraulic radius | L | ft | m |
Kinematic viscosity | L2 / T | ft2/s | m2/s |
Length | L | ft | m |
Manning's roughness coefficient | T / L1/3 | s/ft1/3 | s/m1/3 |
Mass | F T2 / L | lb s2/ft | N s2/m |
Modulus of elasticity | F / L2 | lb/in2 (psi) | Pa |
Perimeter, Weir Height | L | ft | m |
Pressure | F / L2 | lb/ft2 | Pa |
Radius | L | ft | m |
Shear stress | F / L2 | lb/ft2 | Pa |
Size of roughness | L | ft | m |
Specific weight | F / L3 | lb/ft3 | kg/m3 |
Surface tension | F / L | lb/ft | kg/m |
Time | T | s | s |
Thickness | L | ft | m |
Time | T | s | s |
Total head | L | ft | m |
Unit flow rate | L3 / T L | ft3/(s ft) | m3/(s ft) |
Velocity | L / T | ft/s | m/s |
Viscosity | F T / L2 | lb s/ft | Pa s |
Weight | F | lbf | N |
- L - length
- F - force
- T - time