Physical
models are of two types, static and dynamic. Static physical model is scaled
down model of a system which does not change with time. An architect before
constructing a building, makes a scaled down model of the building, which
reflects all its rooms, outer design and other important features. This is an
example of static physical model. Similarly for conducting trials in water, we
make small water tanks, which are the replica of sea, and fire small scaled
down shells in them. This tank can be treated as a static model of sea.
Dynamic
physical model are ones which changes with time or which are function of time.
In wind tunnel, small aircraft models (static models) are kept and the air is
blown over them with different velocities and pressure profiles are measured
with the help of transductions embedded in the model. Here wind changes with
time and is the example of dynamic physical model.
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