Malström

۹۸ طرفدار

۱۳ انتشار • فعال از ۲۰۱۰

A whirlpool is a body of rotating water produced by opposing currents or a current running into an obstacle. Miniature whirlpools form when a bath or a sink is draining. More powerful ones formed in seas or oceans may be called maelstroms ( MAYL-strom, -⁠strəm). Vortex is the proper term for a whirlpool that has a downdraft. In narrow ocean straits with fast flowing water, whirlpools are often caused by tides. Many stories tell of ships being sucked into a maelstrom, although only smaller craft are actually in danger. Small whirlpools appear at river rapids and can be observed downstream of artificial structures such as weirs and dams. Large cataracts, such as Niagara Falls, produce strong whirlpools.