SS Archimedes SS Archimedes SS "Archimedes" was a steamship built in Britain in 1839. She is notable for being the world's first steamship to be driven by a screw propeller. "Archimedes" had considerable influence on ship development, encouraging the adoption of screw propulsion by the Royal Navy, in addition to her influence on commercial vessels. She also had a direct influence on the design of another innovative vessel, Isambard Kingdom Brunel's , then the world's largest ship and the first screw-propelled steamship to cross the Atlantic Ocean. The principle of moving water with a screw has been known since the invention of
Archimedes number forced convection dominates. When the density difference is due to heat transfer (e.g. fluid being heated and causing a temperature difference between different parts of the fluid), then we may write where: Doing this gives the Grashof number, i.e. the Archimedes and Grashof numbers are equivalent but suited to describing situations where there is a material difference in density and heat transfer causes the density difference respectively. The Archimedes number is related to both the Richardson number and Reynolds number via Archimedes number In viscous fluid dynamics, the Archimedes number (Ar) (not to be confused with Archimedes' constant, π), named