Robert Boyle

Robert Boyle (1627-1691) is noted for his work with gases. He conducted his studies while a student at Oxford and was one of the first to conduct experiments to prove his theories rather than reason his theories out logically. One of his earliest experiments was to produce a vacuum in a sealed container. He was then able to observe the effect of a vacuum on sound.  He published the results of his work in 1600, in a book entitled, New Experiments in Physio-Mechinacall, Touching the Spring of the Air and its Effects.  He is most famous for his gas law. Wait! There’s more!

Fluids Defined

What exactly is a fluid? It helps to know the characteristics!

  1. Fluids are a state of matter in which a substance cannot hold a shape.
  2. Fluids can be a liquid, a gas, or air.
  3. Newtonian fluids flow easily and continually under an applied stress.
  4. Liquids are said to flow in a continuum.
  5. Some fluids, such as air and gas, are said to be compressible.

Some fluids are Newtonian. These fluids have a:

  1. linear relationship between the shear stress  and the shear rate.
  2. definable coefficient of viscosity.
  3. constant coefficient of viscosity.
  4. predictable behavior.

Some fluids are Non-Newtonian. These fluids:

  1. do not behave like Newtonian fluids.
  2. are subject to shear stress from other factors such as temperature and pressure.
  3. coefficient of viscosity  that is not possible to calculate.
  4. have unpredictable behavior.

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