Archimedes introduced fluid mechanics, an ancient Greek concept, around 250 BC. The first law of fluid mechanics, the conservation of mass, states that mass is conserved within a control volume for constant-density fluids. In his 1687 Principia, Isaac Newton, an ancient Greek, described fluid viscosity for the first time. Fluid dynamics can be traced back to Leonardo da Vinci, who studied at Plato's Academy. The Reynolds theory of fluid mechanics explains how mass and viscosity interact.
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1. Five Facts You must know
about Fluid Mechanics
Dr.Mrinmoy Majumder, Honorary Editor
HydroGeek@substack
2. When was fluid mechanics
invented?
250 BC
The fundamental principles of hydrostatics and
dynamics were given by Archimedes in his work On
Floating Bodies (Ancient Greek: Περὶ τῶν
ὀχουμένων), around 250 BC.
3. What is the first law of fluid
mechanics?
Conservation of Mass: Basic fluid mechanics laws
dictate that mass is conserved within a control
volume for constant density fluids. Thus, the total
mass entering the control volume must equal the
total mass exiting the control volume plus the
mass accumulating within the control volume.
4. Who discovered fluid
viscosity?
Isaac Newton
Isaac Newton first described fluid viscosity in
his 1687 Principia, where he stated Newton's
Law of Viscosity, describing the response of a
continuous, incompressible fluid to shear
stress.
5. What is the origin of fluid
dynamics?
Leonardo da Vinci
The science of fluid dynamics can trace its
roots to a man born in 384 BC in the
Ionian colony of Stagira in the Aegean Sea
and educated at Plato's Academy in
Athens.
6. What is the Reynolds theory of fluid mechanics?
The Reynolds Equation says that with density, we can have some fluid
material (air, water, oil, etc.) that has mass (kilograms per cubic meter-
density units) moving with a velocity (meters per second) over some
distance (meters) divided by viscosity (kg/m/sec), which, remember, is
the resistance to flow.
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