Figure 3. Model facility showing bathymetry (measurements given in feet may be
converted to meters by multiplying by 0.3048)
Based on Froude's model law (Hughes 1993) and the linear scale of 1:50, the
model-prototype relations in Table 1 were derived. Dimensions are in terms of
length ! and time t. Figure 4 shows the model inlet during testing. As
mentioned previously, other scales may be assumed for the bathymetric contours,
so different scaling relationships would apply from these in Table 1.
A movable, 24.4-m- (80-ft-) long, unidirectional wave generator (Figure 2)
was located on the ocean side of the facility to produce either irregular or
monochromatic waves of fixed direction (long-crested waves). Unscaled wave
periods could be varied from 0.5 to about 3 sec and wave heights to 10 cm
(0.3 ft) (at the generator location and for this model configuration). Wave angle
(incident wave direction) was varied for specific tests by moving the generator on
its casters.
7
Chapter 2 Laboratory Facility, Equipment, and Experiment Design
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