Category
page 1Buoyancy

Archimedes
Archimedes of Syracuse ( ; ) was an Ancient Greek mathematician, physicist, engineer, astronomer, and inventor from the city of Syracuse in Sicily. Although few details of his life are known, based on his surviving work, he is considered one of the leading scientists in classical antiquity, and one of the greatest mathematicians of all time. Archimedes anticipated modern calculus and analysis by applying the concept of the infinitesimals and the method of exhaustion to derive and rigorously prove many geometrical theorems, including the area of a circle, the surface area and volume of a sphere
Archimedes' principle
law of physics fundamental to fluid mechanics
buoyancy
thumb|The forces at work in buoyancy. The object floats at rest because the upward force of buoyancy is equal to the downward force of gravity.

isostasy
Isostasy () or isostatic equilibrium is the state of gravitational equilibrium between Earth's crust (or lithosphere) and mantle such that the crust "floats" at an elevation that depends on its thickness and density. This concept is invoked to explain how different topographic heights can exist at Earth's surface. Although originally defined in terms of continental crust and mantle, it has subsequently been interpreted in terms of lithosphere and asthenosphere, particularly with respect to oceanic island volcanoes, such as the Hawaiian Islands.
Grashof number
characteristic number in fluid dynamics
chimney effect
phenomenon exposing movement of air into and out of buildings, chimneys, flue gas stacks, or other containers, resulting from air buoyancy
Richardson number
characteristic number of a falling body proportional to the quotient of potential and kinetic energy
Brunt–Väisälä frequency
angular frequency at which a vertically displaced parcel will oscillate within a statically stable environment
Boussinesq approximation
simplification for simulating fluids under natural convection
metacentric height
measurement of the initial static stability of a floating body
Equilibrium level
the height in the atmosphere at which a rising parcel of air reaches surrounding air of the same temperature
lifting gas
gas used to create buoyancy in a balloon or aerostat
Monin–Obukhov length
variable in atmospheric physics
compartment
portion of the space within a ship
delamination (geology)
process occurring when lower continental crust and mantle lithosphere break away from the upper continental crust
float
buoyant object used to indicate liquid level
neutral buoyancy
a state where buoyancy forces are exactly balanced by weight on an immersed body