Fluid
A fluid is a
substance, which deforms when subjected to a force. A fluid can offer no
permanent resistance to any force causing change of shape. Fluid flow under
their own weight and take the shape of any solid body with which they are in
contact. Fluids may be divided into liquids and gases. Liquids occupy definite
volumes. Gases will expand to occupy any containing vessel.
S.I Units in
Fluids
The
dimensional unit convention adopted in this course is the System International
or S.I system. In this convention, there are 9 basic dimensions. The three
applicable to this unit are: mass, length and time.
The
corresponding units are kilogrammes (mass), metres (length), and seconds
(time). All other fluid units may be derived from these.
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