Principles of Physical Similarity - An Introduction
Laboratory tests are usually carried out under altered conditions of the operating variables from the actual ones in practice. These variables, in case of experiments relating to fluid flow, are pressure, velocity, geometry of the working systems and the physical properties of the working fluid.
The pertinent questions arising out of this situation are:
Answer of the above two questions lies in the principle of physical similarity. This principle is useful for the following cases:
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Principles of Physical Similarity - An Introduction
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