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In fluid dynamics, the Keulegan–Carpenter number, also called the period number, is a dimensionless quantity describing the relative importance of the drag forces over inertia forces for bluff objects in an oscillatory fluid flow.
For long waves (λ ≫ h) with small Ursell number, U ≪ 32 π 2 / 3 ≈ 100, [3] linear wave theory is applicable. Otherwise (and most often) a non-linear theory for fairly long waves ( λ > 7 h ) [ 4 ] – like the Korteweg–de Vries equation or Boussinesq equations – has to be used.
Box2D is a free open source 2-dimensional physics simulator engine written in C by Erin Catto and published under the MIT license. It has been used in Crayon Physics Deluxe , Limbo , Rolando , Incredibots , Angry Birds , Tiny Wings , Shovel Knight , Transformice , Happy Wheels , [ 3 ] and many online Flash games, [ 4 ] as well as iPhone, iPad ...
The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured.
Quantity (common name/s) (Common) symbol/s SI units Dimension Number of wave cycles N: dimensionless dimensionless (Oscillatory) displacement Symbol of any quantity which varies periodically, such as h, x, y (mechanical waves), x, s, η (longitudinal waves) I, V, E, B, H, D (electromagnetism), u, U (luminal waves), ψ, Ψ, Φ (quantum mechanics).
A Kelvin wave is a wave in the ocean, a large lake or the atmosphere that balances the Earth's Coriolis force against a topographic boundary such as a coastline, or a waveguide such as the equator. A feature of a Kelvin wave is that it is non-dispersive , i.e., the phase speed of the wave crests is equal to the group speed of the wave energy ...
Step is based on bodies and forces placed by the user: Bodies range from tiny particles to huge polygons, and each body has unique properties that influence the outcome of the simulation, such as mass and velocity, and their derivations such as kinetic energy.
The KP equation was first written in 1970 by Soviet physicists Boris B. Kadomtsev (1928–1998) and Vladimir I. Petviashvili (1936–1993); it came as a natural generalization of the KdV equation (derived by Korteweg and De Vries in 1895). Whereas in the KdV equation waves are strictly one-dimensional, in the KP equation this restriction is ...