Richardson criterion سنجیدار ِ ریچاردسون sanjidâr-e Richardson
*Fr.: critère de Richardson*
A condition for the onset of → *instability*
in multilayer fluids which compares the balance between the restoring force of
→ *buoyancy* and the destabilizing effect of the
→ *shear*. Named after the British meteorologist Lewis Fry Richardson (1881-1953), who
first arrived in 1920 to the dimensionless ratio now called
→ *Richardson number*. The first formal proof of the criterion, however,
came four decades later for → *incompressible flow*s
(Miles, J. W. 1961, J. Fluid Mech., 10, 496; Howard, L. N., 1961, J. Fluid Mech., 10, 509).
Its extension to → *compressible flow*s was demonstrated subsequently
(Chimonas 1970, J. Fluid Mech., 43, 833); → *criterion*. |