30
this to occur, both the model and the prototype values for each dimensionless parameter must be the same. For the Froude Number, Equation 3.4 must be satisfied at all times.
VYV
S- P (3.4)
* V = velocity
* g = gravity
* d = depth When Equation 3.4 is solved for a time relationship between the model and the prototype, it provides a geometric scale between the two.
L. t_,
T (3.5)
L. = ( T P- (3.6)
1 L .1L
._ = (L (3.7)
T., Z (3.8) TP
ap
* L = length scale
* V = velocity scale
* T = time scale From the basic relationship V= LIT, an equation relating velocity to the geometric scale between model and prototype is determined.