9. Physical Modeling
297
Table 9.1. (Continued)
Unit
Remarks
Moment
ML2T“2
Applied force times its distance
from a fixed point
Shear
MLT-2
Force per unit cross sectional area
parallel to the force
"Section Modulus
L3
Area moment of inertia divided by
the distance from the neural axis
to the extreme fiber
hydraulics
Kinetic Energy
ML2T~2
Capacity of a body for doing work
due to its configuration
Pressure Energy
ml2t-2
Energy due to pressure head
Potential Energy
ml2t~2
Capacity of a body for doing work
due to its configuration
Loss to friction
ML2T“2
Loss of energy or work due to
friction
SCOUR
Grain size of sédiments
L
For same prototype material
Free fall velocity
LT”1
Final velocity of a freely falling
particle in a medium
WAVE MECHANICS
Wave Height
L
Consecutive crest to trough
distance
Wave Period
T
Time between two successive crests
passing a point
Wave Length
L
Distance between two successive
crests at a given time
Celerity
LT"1
Velocity of wave (crest, for
example)
Particle Velocity
LT”1
Rate of change of movement of a
water particle
Particle Accélération
LT"2
Rate of change of velocity of a
water particle
Particle Orbit
L
Path of a water particle (closed or
open)
Wave Elévation
L
Form of wave (distance from still
waterline)
Wave Pressure
------ — __ _ _ _ _ _ _
ML-iT-2 Force exerted by a water particle
per unit area
(Continued)