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Fluid Mechanics Chapter 1: Basic Properties and Flow Characteristics
1. 6
Chapter 1
BASIC PROPERTIES
AND
FLOW CHARACTERISTICS
UNITS AND DIMENSIONS SESSION 1
Units:
Units may be defined as those standards in terms of which physical quantities
like area, volume, time, velocity etc. are measured For example; unit of length in
S.I.system is metre, unit of time is second, unit of mass is kg etc.
Dimensions:
Various quantities used to describe a phenomenon can be expressed in
terms of set of quantities which are so to say independent of each other. These quantities
are called “Fundamental Quantities” or “Primary Quantities”. These are mass, length,
time and temperature and are represented by M, L, T, Q.