free-surface elevation
1Ocean surface wave — Ocean surface waves are surface waves that occur on the free surface of the ocean. They usually result from wind, and are also referred to as wind waves. Some waves can travel thousands of miles before reaching land. They range in size from small …
2Digital elevation model — 3D rendering of a DEM of Tithonium Chasma on Mars A digital elevation model is a digital model or 3 D representation of a terrain s surface commonly for a planet (including Earth), moon, or asteroid created from terrain elevation data. There is… …
3obstacle-free zone — The obstacle free zone is a three dimensional volume of airspace set up to protect aircraft transitioning to and from the runway. The OFZ clearing standard precludes taxiing and parked airplanes and object penetrations, except for frangible… …
4SEPTA Subway–Surface Trolley Lines — Infobox rail line name = color box|#SEPTA color|Subway Surface Subway–Surface Trolley Lines image width = 250px caption = #9074 operates on the #13 line in Darby, PA. type = Trolley system = status = locale = Philadelphia, Yeadon, and Darby, PA… …
5Obstacle Free Zone — The Obstacle Free Zone (OFZ) is a three dimensional volume of airspace below 150 feet (46 m), above the established airport elevation which protects for the transition of aircraft to and from the runway. The Obstacle Free Zone (OFZ) clearing …
6Airy wave theory — In fluid dynamics, Airy wave theory (often referred to as linear wave theory) gives a linearised description of the propagation of gravity waves on the surface of a homogeneous fluid layer. The theory assumes that the fluid layer has a uniform… …
7Cnoidal wave — US Army bombers flying over near periodic swell in shallow water, close to the Panama coast (1933). The sharp crests and very flat troughs are characteristic for cnoidal waves. In fluid dynamics, a cnoidal wave is a nonlinear and exact periodic… …
8Mild-slope equation — Simulation of wave penetration involving diffraction and refraction into Tedious Creek, Maryland, using CGWAVE (which solves the mild slope equation). In fluid dynamics, the mild slope equation describes the combined effects of diffraction and… …
9Boussinesq approximation (water waves) — In fluid dynamics, the Boussinesq approximation for water waves is an approximation valid for weakly non linear and fairly long waves. The approximation is named after Joseph Boussinesq, who first derived them in response to the observation by… …
10Ursell number — In fluid dynamics, the Ursell number indicates the nonlinearity of long gravity surface waves on a fluid layer. This dimensionless parameter is named after Fritz Ursell, who discussed its significance in 1953. [cite journal | first=F |… …
