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Cavitation Tunnel
A water tunnel is an experimental facility used for testing the hydrodynamic behavior of submerged bodies in flowing water. It functions similar to a recirculating wind tunnel, but uses water as the working fluid, and related phenomena are investigated, such as measuring the forces on scale models of submarines or lift and drag on hydrofoils. Water tunnels are sometimes used in place of wind tunnels to perform measurements because techniques like particle image velocimetry (PIV) are easier to implement in water. For many cases as long as the Reynolds number is equivalent, the results are valid, whether a submerged water vehicle model is tested in air or an aerial vehicle is tested in water. For low Reynolds number flows, tunnels can be made to run oil instead of water. The advantage is that the increased viscosity will allow the flow to be a faster speed (and thus easier to maintain in a stable manner) for a lower Reynolds number. Whereas in wind tunnels the driving force is usua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berlin-tiergarten Vws 20050404 P1020295
Tiergarten (, literally ''Animal Garden'', historically for ''Deer Garden'') is a locality within the borough of Mitte, in central Berlin (Germany). Notable for the great and homonymous urban park, before German reunification, it was a part of West Berlin. Until Berlin's 2001 administrative reform, Tiergarten was also the name of a borough (Bezirk), consisting of the current locality (''Ortsteil'') of Tiergarten (formerly called ''Tiergarten-Süd'') plus Hansaviertel and Moabit. A new system of road and rail tunnels runs under the park towards Berlin's main station in nearby Moabit. History Historical notes Once a hunting ground of the Electors of Brandenburg the ''Großer Tiergarten'' park of today was designed in the 1830s by landscape architect Peter Joseph Lenné. In the course of industrialization in the 19th century, a network of streets was laid out in the Hobrecht-Plan in an area that came to be known architecturally as the Wilhelmine Ring. In 1894 the Reichstag bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
